An inflation detection device with a fixed connection for plastic film welding seams

Abstract

An air inflation detection device for fixed connection of plastic film welding seams, comprising a starting-end air inflation device and a terminal detection device. The starting-end air inflation device and the terminal detection device are respectively located at both ends of the plastic film welding seam (5). The air inflation port of the starting-end air inflation device is connected to an external air inflation device and a pressure gauge. The starting-end air inflation device is an integrated structure composed of an air inflation valve (1), a fixed connection seat (2) and a ventilation pipe (3). The terminal detection device is an integrated structure composed of an induction display valve (4), a fixed connection seat (2) and a ventilation pipe (3). The induction display valve (4) can detect the pressure in the welding seam (5). The air inflation detection device for fixed connection of plastic film welding seams of the present invention ensures the sealing property during the detection process of plastic film welding seams, has lower cost, is easier to construct, has accurate detection data, can be inflated and detected multiple times, and effectively ensures the use effect and service life of the overall project.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic film weld seam detection, and particularly relates to a fixed connection inflation detection device for plastic film weld seams. Background Art

[0002] Plastic films are widely used in life. For plastic films that need to be used in large areas, they usually need to be welded together, such as the plastic films used in greenhouses or waterproof projects. Taking geomembranes as an example, currently, geomembranes are used in engineering anti-seepage of landfills, biogas digesters, river channels, reservoirs, roofs, oil tank foundations, etc. The welding seam of the geomembrane is a very critical process, directly affecting the overall engineering effect and service life. Generally, there are mainly two detection methods for geomembrane weld seams. One is inflation detection, that is, inflating the inside of the weld seam to check whether the geomembrane weld seam can maintain airtightness for 5 minutes under a pressure of 0.25 Mpa. Considering that the geomembrane coil is relatively soft and easy to deform, the plastic film allows a 20% pressure drop. The other is destructive testing, that is, performing a peel or shear test on the geomembrane weld seam.

[0003] Among them, inflation detection is carried out during the welding process of the geomembrane, and the detection frequency is relatively high, including the initial inspection, re-inspection, etc. of the geomembrane weld seam. The current detection means is usually to open the surface of the geomembrane weld seam, then insert a conical inflatable tube into it, and then inflate the inflatable tube to the specified pressure to observe the change of the pressure gauge. This detection method has many problems: 1. The connection between the conical inflatable tube and the surface of the geomembrane weld seam is easy to loosen, resulting in air leakage; 2. Only observing the value of the pressure gauge may lead to inaccurate detection results, and it is impossible to accurately determine the pressure value and air leakage situation at the end of the weld seam; 3. It requires professional and skilled personnel to use, and it is difficult to ensure a successful detection at one time. Summary of the Invention

[0004] In order to solve the problems of inconvenient use, inaccurate data, and high requirements for personnel in the traditional plastic film weld seam detection method, the present invention provides a fixed connection inflation detection device for plastic film weld seams, which ensures the sealing during the detection process of the plastic film weld seam, has a lower cost, is easier to construct, has accurate detection data, can be inflated and detected multiple times, and effectively ensures the use effect and service life of the overall project.

[0005] The technical solution of the present invention is as follows:

[0006] A fixed connection inflation detection device for plastic film weld seams includes a starting end inflation device and a terminal detection device. The starting end inflation device and the terminal detection device are respectively located at both ends of the plastic film weld seam. The inflation port of the starting end inflation device is connected to an external inflation device and a pressure gauge;

[0007] The starting-end inflation device includes an inflation valve, a fixed connection seat, and an air pipe. When in use, the fixed connection seat is fixed on the surface of the plastic film weld seam to ensure the sealing performance at the connection between the starting-end inflation device and the plastic film weld seam. One end of the inflation valve is connected to the fixed connection seat, and the other end extends outward from the plastic film weld seam. The opening direction of the inflation valve can face upward or to the side, which is convenient for connecting to an external inflation device. One end of the air pipe is connected to the fixed connection seat, and the other end extends into the plastic film weld seam;

[0008] The terminal detection device includes an induction display valve, a fixed connection seat, and an air pipe. When in use, the fixed connection seat is fixed on the surface of the plastic film weld seam to ensure the sealing performance at the connection between the terminal detection device and the plastic film weld seam. One end of the induction display valve is connected to the fixed connection seat, and the other end extends outward from the plastic film weld seam. The induction display valve can detect the pressure magnitude inside the weld seam. One end of the air pipe is connected to the fixed connection seat, and the other end extends into the plastic film weld seam.

[0009] Preferably, in the plastic film weld seam fixed-connection inflation detection device as described above, the inflation valve, the fixed connection seat, and the air pipe in the starting-end inflation device are of an integral structure and are internally connected. The induction display valve, the fixed connection seat, and the air pipe in the terminal detection device are also of an integral structure and are internally connected. This facilitates the manufacture of the starting-end inflation device and the terminal detection device.

[0010] Furthermore, the air pipe in the starting-end inflation device is a pointed pipe, and the size of its head is smaller than the root size where the air pipe is connected to the fixed connection seat, which is convenient for inserting into the plastic film weld seam.

[0011] Furthermore, the air pipe in the starting-end inflation device includes one or more ventilation ports, and one or more of the ventilation ports can be respectively connected to different weld seams inside. For example, the air pipe can include two parallel ventilation ports in the same direction for the detection of single-direction double weld seams; the air pipe can also include two ventilation ports arranged in parallel at 180 degrees for the detection of weld seams in two parallel directions; the air pipe can also include two ventilation ports arranged perpendicular to each other at 90 degrees in the same plane for the detection at right-angle weld seams; the air pipe can also include three ventilation ports arranged in a "T" shape for the detection of weld seams at the "T" - shaped three - direction location.

[0012] In the plastic film weld seam fixed-connection inflation detection device as described above, the induction display valve includes a tubular airbag arranged vertically upward. An activity marker is provided inside the tubular airbag, and the activity marker can move up and down inside the tubular airbag according to the change of the pressure value inside the plastic film weld seam, which is convenient for the operator to observe the pressure value inside the plastic film weld seam.

[0013] The inflatable detection device with fixed connection for plastic film welding seams as described above, the induction display valve can also adopt a spherical airbag. The airbag can be pinched flat and becomes spherical after inflation. The pressure inside the plastic film welding seam can be sensed by pinching it with hand.

[0014] A method of using the inflatable detection device with fixed connection for plastic film welding seams as described above, comprising the following steps:

[0015] Step 1: Cut open the upper layer film at both ends of the welding seam, and the incision sizes match the sizes of the ventilation pipes of the starting inflating device and the terminal detection device respectively;

[0016] Step 2: Insert the head of the ventilation pipe of the starting inflating device into the inside of the welding seam from the incision, and make the fixed connection seat contact the film surface of the welding seam;

[0017] Step 3: Insert the head of the ventilation pipe of the terminal detection device into the inside of the welding seam from the cut, and make the fixed connection seat contact the film surface of the welding seam;

[0018] Step 4: Fix the fixed connection seats of the starting inflating device and the terminal detection device to the film surface of the welding seam respectively;

[0019] Step 5: After the fixed connection seat in Step 4 is firmly fixed to the film surface of the welding seam, connect the inflating device to the inflating valve of the starting inflating device, and ventilate inward, and observe the air pressure in the induction display valve of the terminal detection device;

[0020] Step 6: After the detection is completed, disconnect the inflating device from the inflating valve. When reinspecting the plastic film welding seam, repeat the above Steps 1 to 5 again.

[0021] Furthermore, the fixation of the fixed connection seat to the film surface of the welding seam in the above Step 4 includes, but is not limited to, the following methods: fixing by a welding torch, fixing with glue, fixing with double-sided self-adhesive.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. For the inflatable detection device with fixed connection for plastic film welding seams disclosed by the present invention, the starting inflating device and the terminal detection device are respectively sealed and fixed to the plastic film welding seam through the fixed connection seat, ensuring the sealing during the detection process of the plastic film welding seam. It does not require professional technicians to operate. After simple training for the operators, they can start working, reducing the operation difficulty.

[0024] 2. For the inflatable detection device with fixed connection for plastic film welding seams disclosed by the present invention, connecting an external inflating device to the inflating valve can ventilate the inside of the plastic film welding seam. During the later reinspection, it is very convenient to use, saving a lot of time for construction workers and detection personnel, and thus reducing the labor cost.

[0025] 3. The fixed connection inflation detection device for plastic film welding seams disclosed by the present invention has a simple structure, low cost, accurate detection data. The detector can intuitively see the pressure condition inside the plastic film welding seam through the airbag state of the induction display valve, and then effectively control the product and construction quality. It can be applied to polymer sheets such as polyethylene film, polyvinyl chloride film, EVA film, etc., with a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the detailed description of the preferred embodiments below, the solutions and advantages of the present application will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention.

[0027] In the drawings:

[0028] Figure 1 is a schematic structural diagram of the fixed connection inflation detection device for plastic film welding seams of Embodiment 1;

[0029] Figure 2 is a schematic structural diagram of the inflation valve of Embodiment 1 when applied to a one-way double welding seam;

[0030] Figure 3 is a schematic structural diagram of the inflation valve of Embodiment 1 when applied to a right-angle double welding seam;

[0031] Figure 4 is a schematic structural diagram of the inflation valve of Embodiment 1 when applied to welding seams in two parallel directions;

[0032] Figure 5 is a schematic structural diagram of the inflation valve of Embodiment 1 when applied to a "T"-shaped three-way welding seam;

[0033] Figure 6 is a schematic structural diagram of the fixed connection inflation detection device for plastic film welding seams of Embodiment 2;

[0034] The components represented by the reference numerals in the drawings are:

[0035] 1. Inflation valve, 2. Fixed connection seat, 3. Vent pipe, 4. Induction display valve, 41. Tubular airbag, 42. Movable marker, 43. Spherical airbag, 5. Welding seam. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following will describe the exemplary embodiments of the present disclosure in more detail with reference to the drawings. It should be noted that these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. The present disclosure can be implemented in various forms and should not be limited by the embodiments described herein.

[0037] Example 1

[0038] See Figure 1 , Figure 1 , which is a fixed - connection inflation detection device for plastic film weld seams in this embodiment, including a starting - end inflation device and a terminal - end detection device. It can be applied to polymer sheets such as polyethylene film, polyvinyl chloride film, EVA film, etc., with a wide range of applications. The starting - end inflation device and the terminal - end detection device are respectively located at both ends of the plastic film weld seam. The inflation port of the starting - end inflation device is connected to an external inflation device and a pressure gauge.

[0039] The starting - end inflation device includes an inflation valve 1, a fixed connection seat 2, and a ventilation pipe 3. The fixed connection seat 2 is made of the same or similar material as the welded plastic film, so that the fixed connection seat 2 and the plastic film weld seam can be fixed together. During use, the fixed connection seat 2 is fixed on the surface of the plastic film weld seam to ensure the sealing performance at the connection between the starting - end inflation device and the plastic film weld seam. The shape of the fixed connection seat 2 can be various planar shapes such as circular, rectangular, square, triangular, or parallelogram, etc., which can be determined according to the on - site situation as long as it fits the film surface of the plastic film weld seam.

[0040] Furthermore, one end of the inflation valve 1 is connected to the fixed connection seat 2, and the other end extends outside the plastic film weld seam. The structure of the inflation valve 1 is similar to that of a valve stem. Its opening direction can be upward or towards the side position, which is convenient for connecting to an external inflation device. One end of the ventilation pipe 3 is connected to the fixed connection seat 2, and the other end extends into the plastic film weld seam. Preferably, the inflation valve 1, the fixed connection seat 2, and the ventilation pipe 3 in the starting - end inflation device can be an integrated structure with internal communication, which is convenient for manufacturing.

[0041] Furthermore, the ventilation pipe 3 in the starting - end inflation device is a pointed pipe, and the size of its head is smaller than the root size where the ventilation pipe 3 is connected to the fixed connection seat 2, which is convenient for inserting into the plastic film weld seam.

[0042] Furthermore, the ventilation pipe 3 in the starting - end inflation device includes one or more ventilation openings. One or more of the ventilation openings can be respectively connected to different weld seams, and multiple plastic film weld seams can be detected simultaneously, improving the detection efficiency. The following will be described in detail with reference to the accompanying drawings.

[0043] See Figure 2 , the ventilation pipe 3 can include two parallel ventilation openings in the same direction for detecting single - direction double weld seams.

[0044] See Figure 3 , the ventilation pipe 3 can include two ventilation openings arranged perpendicular to each other at 90 degrees in the same plane for detecting right - angle weld seams.

[0045] SeeFigure 4 The vent pipe 3 may include two vent openings arranged in parallel at 180 degrees for detecting the weld seams in two parallel directions.

[0046] See Figure 5 The vent pipe 3 may include three vent openings arranged in a "T" shape for detecting the weld seams at the three directions of the "T" shape.

[0047] In this embodiment, the terminal detection device includes an induction display valve 4, a fixed connection seat 2, and a vent pipe 3. The usage method of the fixed connection seat 2 of the terminal detection device is the same as that of the fixed connection seat 2 of the starting end inflation device, and both are fixed on the surface of the plastic film weld seam to ensure the sealing performance at the connection between the terminal detection device and the plastic film weld seam. One end of the induction display valve 4 is connected to the fixed connection seat 2, and the other end extends outside the plastic film weld seam. The induction display valve 4 can detect the pressure magnitude inside the weld seam. One end of the vent pipe 3 is connected to the fixed connection seat 2, and the other end extends inside the plastic film weld seam. Preferably, the induction display valve 4, the fixed connection seat 2, and the vent pipe 3 in the terminal detection device are also of an integral structure and are internally connected, which is convenient for manufacturing.

[0048] Furthermore, the induction display valve 4 adopts a tubular airbag 41 structure and is arranged vertically upward. An activity marker 42 is provided inside the tubular airbag 41. The activity marker 42 can move up and down inside the tubular airbag 41 according to the change of the pressure value inside the plastic film weld seam, which is convenient for the operator to observe the pressure value inside the plastic film weld seam. Preferably, the tubular airbag 41 is a transparent airbag, and the surface of the activity marker 42 is painted, which is convenient for observing the position of the activity marker 42 inside the tubular airbag 41.

[0049] A usage method of applying the above plastic film weld seam fixed connection inflation detection device includes the following steps:

[0050] Step 1: Cut the upper layer film at both ends of the weld seam, and the cut sizes respectively match the sizes of the vent pipes 3 of the starting end inflation device and the terminal detection device;

[0051] Step 2: Insert the head of the vent pipe 3 of the starting end inflation device into the inside of the weld seam from the cut, and make the fixed connection seat 2 contact the weld seam film surface;

[0052] Step 3: Insert the head of the vent pipe 3 of the terminal detection device into the inside of the weld seam from the cut, and make the fixed connection seat 2 contact the weld seam film surface;

[0053] Step 4: Fix the fixed connection seats 2 of the starting end inflation device and the terminal detection device to the weld seam film surface together respectively;

[0054] Step 5: After the fixed connection seat 2 in Step 4 is firmly fixed to the welded seam film surface, connect the inflation device to the inflation valve 1 of the starting-end inflation device, and introduce air inward to observe the air pressure in the induction display valve 4 of the terminal detection device;

[0055] Step 6: After the detection is completed, disconnect the inflation device from the inflation valve 1. When reinspecting the plastic film welded seam, repeat the above Steps 1 to 5 again.

[0056] Further, in Step 2 above, if the ventilation pipe 3 has multiple ventilation ports, cut the starting ends of multiple plastic film welded seams respectively, then insert the multiple ventilation ports of the ventilation pipe 3 into multiple plastic film welded seams respectively, and ensure that the fixed connection seat 2 can cover all the cuts.

[0057] Further, the fixation of the fixed connection seat 2 to the welded seam film surface in Step 4 above can be fixed to the film surface of the plastic film welded seam using a welding torch and plastic welding rods, or can be fixed to the film surface using glue, or can also be fixed to the film surface using high-strength double-sided self-adhesive, and no limitation is made here.

[0058] Embodiment 2

[0059] Combined with Figure 6 , in this embodiment, the induction display valve 4 adopts the form of a spherical airbag 43 to further simplify the structure. The spherical airbag 43 is communicated with the ventilation pipe and can be pinched flat. After inflation, the airbag is spherical. By pinching it with hand, the pressure condition inside the plastic film welded seam can be sensed by the hand feeling.

[0060] Other features not mentioned in this embodiment can be the same as those in Embodiment 1 and will not be elaborated here.

[0061] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes, increases or decreases, or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A fixed connection inflation detection device for plastic film weld seams, characterized in that, it includes a starting - end inflation device and a terminal detection device. The starting - end inflation device and the terminal detection device are respectively located at both ends of the plastic film weld seam (5). The inflation port of the starting - end inflation device is connected to an external inflation device and a pressure gauge; The starting - end inflation device includes an inflation valve (1), a fixed connection seat (2), and a ventilation pipe (3). When in use, the fixed connection seat (2) is fixed on the surface of the plastic film weld seam (5). One end of the inflation valve (1) is connected to the fixed connection seat (2), and the other end extends outside the plastic film weld seam (5). One end of the ventilation pipe (3) is connected to the fixed connection seat (2), and the other end extends inside the plastic film weld seam (5); The ventilation pipe (3) in the starting - end inflation device includes one or more ventilation ports, and one or more of the ventilation ports can be respectively connected to different weld seams (5); The inflation valve (1), the fixed connection seat (2), and the ventilation pipe (3) in the starting - end inflation device are of an integral structure and are internally connected; The terminal detection device includes an induction display valve (4), a fixed connection seat (2), and a ventilation pipe (3). When in use, the fixed connection seat (2) is fixed on the surface of the plastic film weld seam (5). One end of the induction display valve (4) is connected to the fixed connection seat (2), and the other end extends outside the plastic film weld seam (5). The induction display valve (4) can detect the pressure magnitude inside the weld seam (5). One end of the ventilation pipe (3) is connected to the fixed connection seat (2), and the other end extends inside the plastic film weld seam (5); The induction display valve (4), the fixed connection seat (2), and the ventilation pipe (3) in the terminal detection device are of an integral structure and are internally connected; The fixed connection seat (2) is made of the same or similar material as the welded plastic film, so that the fixed connection seat (2) and the plastic film weld seam can be fixed together.

2. A fixed connection inflation detection device for plastic film weld seams according to claim 1, characterized in that, the opening direction of the inflation valve (1) in the starting - end inflation device is upward or towards the side.

3. A fixed connection inflation detection device for plastic film weld seams according to claim 1, characterized in that, the ventilation pipe (3) in the starting - end inflation device is a pointed - end pipe, and the head size is smaller than the root size at the connection of the ventilation pipe (3) and the fixed connection seat (2).

4. A fixed connection inflation detection device for plastic film weld seams according to claim 1, characterized in that, the induction display valve (4) includes a tubular airbag (41), and a movable marker (42) is arranged inside the tubular airbag (41), and the movable marker (42) can move up and down inside the tubular airbag (41).

5. A fixed connection inflation detection device for plastic film weld seams according to claim 1, characterized in that, the induction display valve (4) includes a spherical airbag (43).

6. A method of using the fixed connection inflation detection device for plastic film weld seams according to any one of claims 1 - 5, characterized in that, it includes the following steps: Step 1: Cut the upper layer film at both ends of the weld seam (5), and the incision sizes are respectively matched with the sizes of the ventilation pipes (3) of the starting end inflation device and the terminal detection device; Step 2: Insert the head of the ventilation pipe (3) of the starting end inflation device into the inside of the weld seam (5) from the incision, and make the fixed connection seat (2) contact the film surface of the weld seam (5); Step 3: Insert the head of the ventilation pipe (3) of the terminal detection device into the inside of the weld seam (5) from the cut, and make the fixed connection seat (2) contact the film surface of the weld seam (5); Step 4: Fix the fixed connection seats (2) of the starting end inflation device and the terminal detection device to the film surface of the weld seam (5) respectively; Step 5: After the fixed connection seat (2) is firmly fixed to the film surface of the weld seam (5) in Step 4, connect the inflation device to the inflation valve (1) of the starting end inflation device, and ventilate inward to observe the air pressure in the induction display valve (4) of the terminal detection device; Step 6: After the detection is completed, disconnect the inflation device from the inflation valve (1), and repeat the above Steps 1 to 5 again when the plastic film weld seam is reinspected.

7. According to the method of using a fixed connection inflation detection device for a plastic film weld seam described in Claim 6, characterized in that, The fixation of the fixed connection seat (2) to the film surface of the weld seam (5) in Step 4 includes but is not limited to the following methods: welding and fixing with a welding torch, fixing with glue, and fixing with double-sided self-adhesive.

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