Air bag assembly for pipeline pressure test

Abstract

The utility model belongs to the technical field of rubber products, and particularly relates to an air bag assembly for pipeline pressure testing. According to the air bag assembly for the pipeline pressure test, the transition section, the mounting section, the inflating valve, the annular protruding belt and the connecting chain unit are arranged on the air bag main body section, so that 1, the annular protruding belt can provide a more sufficient pipeline sealing effect; 2, the connecting chain unit can provide a sufficient and appropriate anti-lost function;

Description

Technical Field

[0001] The utility model belongs to the technical field of rubber products, and particularly relates to an airbag assembly for pipeline pressure testing. Background Art

[0002] Generally, the pipeline pressure testing method is as follows: first, block the end of the pipeline to be tested with an airbag, then apply pressure to the pipeline to be tested, and finally observe whether the decrease range / degree of the pipeline pressure value is within the allowable range. When the pipeline to be tested has relatively small and slow pressure relief, it can be determined that the sealing performance of the pipeline is qualified; otherwise, there are relatively large holes that do not meet the requirements on the pipeline to be tested.

[0003] Therefore, correspondingly, for the above-mentioned airbag assembly, it is required to have at least the following two functions or characteristics: First, when blocking the end of the pipeline, the airtightness is sufficient; second, it is not easy to be lost when not in use. After all, its own size is relatively small and belongs to the category of small parts.

[0004] For example, the Chinese utility model patent with the authorization announcement number CN217105082U and the authorization announcement date of August 2, 2022 discloses a split hole plugging airbag for static breaking of the pile head of a cast-in-place pile, which is composed of a rubber airbag, a valve body and a valve core. Before inflation, the rubber airbag is in a strip shape, and after inflation, it is in a cylindrical shape with a rough surface. The valve body is made of metal. The outer thread on the upper part is used to fix the external inflator pump, the inner thread is used to fix the valve core, and the lower valve seat is adhered to the rubber airbag. The valve core is clamped in the valve body as a gas valve device to control the inflow and outflow of gas.

[0005] The general advantages of the plugging airbag in this utility model patent are as follows: it can effectively resist the expansion force generated by the reaction of the splitting agent during the static breaking process, has a simple structure, and strong engineering practicability.

[0006] However, during the actual use of this plugging airbag, there are at least the following two deficiencies, which are also the technical problems to be solved by the present utility model, namely:

[0007] First, its rubber airbag realizes airtightness only by means of a rough surface, which is far from enough and is prone to the harmful phenomenon of local air leakage.

[0008] Second, it lacks a practical and safe hanging and fixing function, and this plugging airbag is relatively easy to be lost and dropped when not in use.

[0009] Therefore, in summary, there is an urgent need for a new type of airbag assembly with enhanced airtightness on the outer surface of the airbag and a function of preventing dropping when not in use, so as to be used in the pressure testing operations of various pipelines with corresponding sizes. Summary of the Utility Model

[0010] The present utility model provides an airbag assembly for pipeline pressure testing, which can provide a more sufficient pipeline sealing effect through the way of setting a transition section, an installation section, a valve nozzle, an annular protruding belt, and a connecting chain unit on the airbag main body section, and can provide a sufficient and appropriate anti-loss function through the connecting chain unit.

[0011] The technical solution adopted by the present utility model to solve the above problems is: an airbag assembly for pipeline pressure testing, the structure includes an airbag main body section, a transition section, an installation section, and a valve nozzle, and further includes an annular protruding belt arranged on the outer ring surface of the airbag main body section and used to increase the airtightness between the pipeline, and a connecting chain unit arranged on the outer ring surface of the transition section and used for hanging and preventing loss.

[0012] A further preferred technical solution lies in that: the protruding dimension of the annular protruding belt on the outer ring surface of the airbag main body section is 1.0 - 4.0 mm.

[0013] A further preferred technical solution lies in that: the number of the annular protruding belts is 4 - 10, and they are evenly spaced along the axial direction of the airbag main body section.

[0014] A further preferred technical solution lies in that: the connecting chain unit includes an installation ring arranged on the outer ring surface of the transition section, a chain arranged on the installation ring, and a hanging ring arranged on the chain.

[0015] A further preferred technical solution lies in that: the connecting chain unit further includes an opening arranged on the installation ring, two orifice plates respectively arranged at both sides of the opening, and fastening screw connectors arranged on the two orifice plates.

[0016] A further preferred technical solution lies in that: the contour shape of the transition section is frustum-shaped, and a protruding block for axially fixing the installation ring is further arranged on the outer ring surface of the transition section; the connecting chain unit further includes an inner ring surface groove arranged on the installation ring and used for clamping the protruding block.

[0017] A further preferred technical solution lies in that: the shapes of the protruding block and the inner ring surface groove are both arc-shaped, and the two end faces of the protruding block respectively clamp the two end faces of the inner ring surface groove.

[0018] A further preferred technical solution lies in that: the chain is arranged between one of the orifice plates and the bolt head.

[0019] A further preferred technical solution lies in that: the hanging ring is a key ring.

[0020] A further preferred technical solution is that the difference between the outer diameter of the hanging ring and the outer diameter of the airbag main body section before use is ≤ 1 cm. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the present utility model.

[0022] Figure 2 It is a schematic diagram of the position of the annular protruding band in the present utility model.

[0023] Figure 3 It is a schematic structural diagram of the connecting chain unit in the present utility model.

[0024] Figure 4 It is a schematic diagram of one shape of the protruding block in the present utility model.

[0025] Figure 5 It is a schematic diagram of one shape of the inner ring surface groove in the present utility model.

[0026] Figure 6 It is a schematic diagram of the position of the protruding dimension in the present utility model.

[0027] Figure 7 It is a schematic diagram of the position of the chain in the present utility model.

[0028] Figure 8 It is a schematic diagram of the usage mode of the present utility model.

[0029] In the figure, the meanings of the respective marks are as follows:

[0030] Pipe a, protruding dimension b, inflation pipe c, pressure gauge d;

[0031] Airbag main body section 11, transition section 12, installation section 13, valve nozzle 14;

[0032] Annular protruding band 1, connecting chain unit 2, protruding block 3;

[0033] Installation ring 201, chain 202, hanging ring 203, opening 204, orifice plate 205, fastening screw connector 206, inner ring surface groove 207. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following is only a preferred embodiment of the present utility model, and does not limit the scope of the present utility model.

[0035] As shown in the attached Figure 1-8As shown in the figure, an airbag assembly for pipeline pressure testing, the structure includes an airbag main body section 11, a transition section 12, an installation section 13, and a valve nozzle 14. It also includes an annular protruding belt 1 provided on the outer ring surface of the airbag main body section 11 and used to increase the airtightness between the pipeline a, and a connecting chain unit 2 provided on the outer ring surface of the transition section 12 and used for hanging to prevent loss.

[0036] In this embodiment, the airbag main body section 11, the transition section 12, and the installation section 13 are integrally formed, and the material is natural rubber, which has outstanding advantages such as excellent elasticity, wear resistance, tear resistance, and alkali resistance.

[0037] Among them, the installation section 13 and the valve nozzle 14 are fixed by bonding or screwing. When the airbag assembly is in use, the valve nozzle 14 is always connected to the inflatable tube c to ensure that the airbag main body section 11 expands fully and appropriately, and then block the end position of the pipeline a. After that, the pipeline a is inflated and pressurized, and the pressure gauge d is used to detect the speed and degree of the pipeline air pressure drop. If the above two amplitudes are within a reasonable range or an allowable range, it can be determined that the airtightness of the pipeline a is good; otherwise, the pipeline airtightness is unqualified.

[0038] In addition, the valve nozzle 14 is a commercially available product, and the valve pressure is generally 30psi - 40psi, which is suitable for most inflatable devices on the market. The shape of the annular protruding belt 1 is a complete ring, which is also integrally formed with the airbag main body section 11. Its function is to form multiple independent local areas for strengthening resistance and sealing between the airbag main body section 11 and the pipeline a.

[0039] At this time, most of the area of the outer ring surface of the airbag main body section 11 is still inflated and attached to the inner ring surface of the pipeline a to achieve a basic sealing effect, while the multiple annular protruding belts 1 locally strengthen the above sealing effect. So far, as long as the airbag assembly is used normally, it can provide sufficient sealing effect at the end of the pipeline a, and the air leakage between the outer ring surface of the airbag main body section 11 and the inner ring surface of the pipeline a can be ignored.

[0040] On the other hand, the function of the connecting chain unit 2 is that when the airbag assembly is idle and waiting to be used, the connecting chain unit 2 can be hung and fixed, so that the airbag assembly is not easily lost. After all, its size is relatively small and belongs to the category of small parts.

[0041] Furthermore, the connecting chain unit 2 can be hung and fixed on the inflatable device because the airbag assembly must be used together with the inflatable device when in use.

[0042] So far, the airbag assembly has the comprehensive advantages of sufficient sealing performance during use and not being easily lost when waiting to be used.

[0043] The protruding dimension b of the annular protruding belt 1 on the outer circumferential surface of the airbag main body section 11 is 1.0 - 4.0 mm.

[0044] In this embodiment, if the protruding dimension b is small, the effects of the above-mentioned enhanced pressing and enhanced sealing are not obvious. However, if this dimension is larger, most areas of the outer surface of the airbag main body section 11 are difficult to fit the pipe a, resulting in a significant reduction in the basic sealing performance.

[0045] Both of the above two situations need to be avoided, so the above-mentioned numerical range of the protruding dimension b is determined.

[0046] The number of the annular protruding belts 1 is 4 - 10, and they are evenly spaced in the axial direction of the airbag main body section 11.

[0047] In this embodiment, the number of the annular protruding belts 1 is also not too many and not too few, ensuring that the effect of its enhanced sealing is sufficient and appropriate. Finally, between the airbag main body section 11 and the pipe a, a combined sealing effect is formed: most areas are fully fitted, and enhanced pressing is achieved at 4 - 10 positions.

[0048] The connecting chain unit 2 includes a mounting ring 201 provided on the outer circumferential surface of the transition section 12, a chain 202 provided on the mounting ring 201, and a hanging ring 203 provided on the chain 202.

[0049] In this embodiment, the material of the connecting chain unit 2 is stainless steel. The transition section 12 neither needs to fit the inner circumferential surface of the pipe a nor install the valve nozzle 14, so it is a suitable installation position for the connecting chain unit 2.

[0050] Among them, the mounting ring 201 is sleeved on the transition section 12 and at least will not move in the length direction of the airbag assembly. The two ends of the chain 202 are respectively connected to the mounting ring 201 and the hanging ring 203, finally enabling the hanging ring 203 to fix the airbag assembly as required, and preventing the airbag assembly from being lost due to reasons such as easy rolling and small size.

[0051] The connecting chain unit 2 further includes an opening 204 provided on the mounting ring 201, two orifice plates 205 respectively provided on both sides of the opening 204, and fastening screw connectors 206 provided on the two orifice plates 205.

[0052] In this embodiment, the fastening screw connectors 206 are bolts and nuts, which screw the two orifice plates 205 together, enabling the connecting chain unit 2 to be fully fastened on the transition section 12 and also be installed movably.

[0053] When the rubber integral body of the airbag main body section 11, the transition section 12 and the installation section 13 is accidentally damaged, both the connecting chain unit 2 and the valve nozzle 14 can be removed and reused, which is very efficient and practical.

[0054] Wherein, the mounting ring 201 and the two orifice plates 205 are integrally formed.

[0055] The contour shape of the transition section 12 is frustum-shaped, and a protruding block 3 for axially fixing the mounting ring 201 is further provided on the outer ring surface of the transition section 12; the connecting chain unit 2 further includes an inner ring surface groove 207 provided on the mounting ring 201 and used for engaging the protruding block 3.

[0056] In this embodiment, the contour shapes of the airbag main body section 11 and the installation section 13 are generally cylindrical, and with the frustum-shaped transition section 12, the rubber integral body has the shape characteristics of good external dimension coherence and as uniform wall thickness as possible everywhere, so that it is not easy to break after self-pressurization.

[0057] Wherein, the protruding block 3 is also integrally formed with the transition section 12, and its function is to prevent the mounting ring 201 from sliding and shifting left and right, that is, to prevent it from falling off the transition section 12.

[0058] In addition, the inner ring surface groove 207 may or may not protrude on the outer ring surface of the mounting ring 201, which depends on the dimensional values between the protruding size of the protruding block 3 and the wall thickness of the mounting ring 201.

[0059] The shapes of the protruding block 3 and the inner ring surface groove 207 are both arc-shaped, and the two end faces of the protruding block 3 respectively engage the two end faces of the inner ring surface groove 207.

[0060] In this embodiment, the central angle degree of the protruding block 3 > 180°, and it is an open ring, that is, corresponding to the above-mentioned arc shape. And the width, depth and circumferential length of the inner ring surface groove 207 are all adapted to the protruding block 3, and are all slightly larger than the corresponding dimensions of the protruding block 3.

[0061] So far, the mounting ring 201 has the enhanced fixing effect of not being easy to slide axially and not being easy to rotate circumferentially. It is not easy to fall off and does not easily wear the transition section 12, which is very necessary and practical.

[0062] The chain 202 is arranged between one of the orifice plates 205 and the bolt head.

[0063] In this embodiment, the chain 202 is a common commercially available product, and the specific shape can be referred to in the appendix Figure 7 .

[0064] Its first loop is arranged between the orifice plate 205 and the bolt head and is fixed by being pressed by the bolt head. Compared with the way that the first loop is sleeved on the bolt rod, this way has a more stable and safer installation effect, avoiding the frequent impact of the above-mentioned first loop on the orifice plate 205 and the impact transition section 12. For details, please refer to the appendix Figure 3 .

[0065] The hanging ring 203 is a key ring.

[0066] In this embodiment, the hanging ring 203 in the form of a key ring has an installation and hanging method that can be strung on another ring compared with the form of a complete ring, further improving the fixing and anti-loss effect of the airbag assembly.

[0067] The difference between the outer diameter of the hanging ring 203 and the outer diameter of the airbag main body section 11 before use is ≤ 1 cm.

[0068] In this embodiment, the diameter sizes of the hanging ring 203 and the airbag main body section 11 are similar. Therefore, when multiple airbag assemblies are hung, one that matches the pipeline to be tested can be quickly selected, which is very practical, especially when multiple airbag assemblies are hung and installed on an inflation device.

[0069] Furthermore, in order to prevent the rubber part of the airbag assembly from being exposed and aging for a long time, the whole of the airbag main body section 11, the transition section 12, the installation section 13, and the valve nozzle 14 can be built into a box, with the hanging ring 203 exposed.

[0070] At this time, the diameter sizes of the hanging ring 203 and the airbag main body section 11 are similar, and the function of the former indicating the size specification of the airbag main body section 11 becomes more obvious and practical, which is very ingenious.

[0071] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various modifications can be made without departing from the purpose of the present invention. These are all non-creative modifications and are protected by the patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An airbag assembly for pipeline pressure testing, comprising an airbag main body section (11), a transition section (12), a mounting section (13), and a valve (14), characterized in that: It also includes an annular protruding belt (1) arranged on the outer annular surface of the airbag main body section (11) and used to increase the airtightness between the airbag and the pipeline (a), and a connecting chain unit (2) arranged on the outer annular surface of the transition section (12) and used to suspend and prevent loss.

2. The airbag assembly for pipeline pressure testing according to claim 1, characterized in that: The protrusion dimension of the annular protruding band (1) on the outer annular surface of the airbag main body section (11) is 1.0-4.0 mm.

3. The airbag assembly for pipeline pressure testing according to claim 1, characterized in that: The number of the annular protruding bands (1) is 4-10, and they are evenly spaced and distributed in the axial direction of the airbag main body section (11).

4. The airbag assembly for pipeline pressure testing according to claim 1, characterized in that: The connecting chain unit (2) comprises a mounting ring (201) arranged on the outer annular surface of the transition section (12), a chain (202) arranged on the mounting ring (201), and a hanging ring (203) arranged on the chain (202).

5. The airbag assembly for pipeline pressure testing according to claim 4, characterized in that: The connecting chain unit (2) further comprises an opening (204) arranged on the mounting ring (201), two orifice plates (205) respectively arranged at two sides of the opening (204), and fastening screws (206) arranged on the two orifice plates (205).

6. The airbag assembly for pipeline pressure testing according to claim 4, characterized in that: The transition section (12) has a truncated cone-shaped profile, and a protruding block (3) for axially fixing the mounting ring (201) is also provided on the outer ring surface of the transition section (12); the connecting chain unit (2) further comprises an inner ring surface groove (207) provided on the mounting ring (201) and used for engaging the protruding block (3).

7. The airbag assembly for pipeline pressure testing according to claim 6, characterized in that: The protruding block (3) and the inner annular surface groove (207) are both in the shape of an arc, and the two end surfaces of the protruding block (3) respectively engage with the two end surfaces of the inner annular surface groove (207).

8. The airbag assembly for pipeline pressure testing according to claim 5, characterized in that: The chain (202) is arranged between one of the orifice plates (205) and the bolt head.

9. The airbag assembly for pipeline pressure testing according to claim 4, characterized in that: The hanging ring (203) is a key ring.

10. The airbag assembly for pipeline pressure testing according to claim 4, characterized in that: The difference between the outer diameter of the hanging ring (203) and the outer diameter of the airbag main body section (11) before use is ≤1 cm.

Images