PE pipeline pressure testing device

Abstract

The utility model discloses a PE pipeline pressure testing device. The PE pipeline pressure testing device comprises a water storage tank, a pressure pump, a plugging mechanism and a pressure pipeline arranged between the pressure pump and a plugging head, the plugging mechanism comprises a main rod body and an umbrella framework connected to the head end of the main rod body, a water injection channel and an exhaust channel are arranged on the main rod body, and the water injection channel is connected to the pressurizing pipeline; the umbrella framework comprises a plurality of main supporting rods, auxiliary supporting rods connected between the main supporting rods and the main rod body and reinforcing rods between the auxiliary supporting rods and the main supporting rods, pushing rings are arranged at the connecting positions of the auxiliary supporting rods and the main rod body, and a plurality of layers of sealing rubber rings are connected to the pushing rings. By changing the structure of the plugging head, the PE pipe plugging device can be suitable for plugging PE pipes with different pipe diameters.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline construction, and particularly relates to a PE pipeline pressure testing device. Background Art

[0002] The pressure test of PE pipelines is a crucial test for polyethylene (PE for short) pipeline systems, aiming to evaluate the performance of the pipeline systems under specific pressure conditions, including their pressure-bearing capacity, sealing performance, and potential leakage points. This test is crucial for ensuring the safe and effective operation of the pipeline systems within their designed service life.

[0003] In the pressure test of PE pipelines, water is usually added to the pipeline system and pressurized to a certain level, and then maintained for a period of time to simulate the pressure conditions that the pipeline may bear during actual operation. During the test, the pressure changes of the pipeline system are closely monitored, and whether there is any leakage is checked. If the pipeline system can maintain the test pressure and does not leak within the specified time, it is considered to have passed the pressure test.

[0004] However, in the prior art, due to the various sizes of PE pipelines, to meet the requirements of pressurizing and testing PE pipelines, the testing device needs to be able to make good butt-joint connections with PE pipes of different diameters and be able to block PE pipes of different diameters to prevent leakage during the pressurization process, resulting in inaccurate test results. Summary of the Utility Model

[0005] The purpose of the utility model is to address the above problems existing in the prior art and propose a PE pipeline pressure testing device that can be applicable to blocking PE pipes of different diameters by changing the structure of the plug head.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is specifically as follows:

[0007] A PE pipeline pressure testing device includes a water storage tank, a pressure pump, and a plugging mechanism connected in sequence, and a pressure pipeline arranged between the pressure pump and the plug head; the plugging mechanism includes a main rod body, an umbrella frame connected to the head end of the main rod body, and a water injection channel and an exhaust channel are respectively arranged on the main rod body, and the water injection channel is connected to the pressure pipeline; the umbrella frame includes a plurality of main struts, auxiliary struts connected between each main strut and the main rod body, and reinforcing rods between the auxiliary struts and the main struts, and a pushing ring is arranged at the connection between the auxiliary strut and the main rod body, and a plurality of layers of sealing rubber rings are connected to the pushing ring.

[0008] Furthermore, an external connecting thread is arranged on the main rod body, and an internal connecting thread is arranged on the pushing ring.

[0009] Further, one end of the auxiliary strut is fixed on the pushing ring, and the other end is connected to the middle of the main strut.

[0010] Further, one end of the main strut is hinged to the end of the main rod body, and a support plate is provided at the other end of the main strut.

[0011] Further, the multi-layer sealing rubber ring is a rubber ring, and each layer of rubber ring fits to the inner wall of the PE pipe.

[0012] Further, an exhaust valve is provided on the exhaust passage.

[0013] Compared with the prior art, the advantages of the present utility model are as follows: First, the present utility model uses the friction between the umbrella frame and the multi-layer sealing rubber ring and the inner wall of the PE pipe as the connection fastening force. During the test, it is not necessary to perform hot melt connection on the PE pipe, and the test can be completed on-site without other tools. The structure is simple and easy to implement.

[0014] Secondly, the present utility model adopts a structure where the umbrella frame can be slid and expanded to be applicable to PE pipes with different diameters, and the rubber sealing ring suitable for the pipe diameter can be replaced to fit to the inner wall of the PE pipe, playing a good sealing role and enabling good pressure testing inside the PE pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 Structural schematic of the PE pipe pressure testing device provided by the present utility model Figure 1 ;

[0017] Figure 2 Structural schematic of the PE pipe pressure testing device provided by the present utility model Figure 2 。

[0018] Reference numerals: 1, main rod body; 2, pushing ring; 3, sealing rubber ring; 4, auxiliary strut; 5, strengthening rod; 6, main strut; 7, support plate; 8, pressure pump; 9, pressure pipeline; 10, exhaust passage; 11, PE pipe to be tested. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0020] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] In addition, if terms such as "first", "second", "third", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0023] In addition, if terms such as "horizontal", "vertical", "hanging" do not mean that the component is required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] It should be noted that the features in the embodiments of the present utility model can be combined with each other without conflict.

[0026] Such as Figure 1 - Figure 2As shown in the figure, the PE pipe pressure test device includes a water storage tank, a pressure pump 8, and a plugging mechanism connected in sequence, and a pressure pipeline 9 provided between the pressure pump 8 and the plugging head; the plugging mechanism includes a main rod body 1, an umbrella frame connected to the head end of the main rod body 1, and a water injection channel and an exhaust channel 10 are respectively provided on the main rod body 1, and the water injection channel is connected to the pressure pipeline 9; the umbrella frame includes a plurality of main support rods 6, auxiliary support rods 4 connected between each main support rod 6 and the main rod body 1, and reinforcing rods 5 between the auxiliary support rods 4 and the main support rods 6, and a push ring 2 is provided at the connection between the auxiliary support rod 4 and the main rod body 1, and a plurality of layers of sealing rubber rings 3 are connected to the push ring 2.

[0027] Compared with the prior art, in the prior art, the pressure test of PE pipes is mainly carried out by filling water into the PE pipes and exhausting the air therein. A pressure pump is used to increase the water pressure in the pipeline system to the test pressure and maintain it for a period of time to stabilize the pressure. The test pressure is usually 1.5 times or higher than the working pressure of the pipeline system, and the specific value depends on the design requirements and specifications. According to the pressure change and leakage detection results during the test, the performance of the pipeline system is evaluated to see if it meets the requirements. If the pipeline system can maintain the test pressure and does not leak within the specified time, it is considered to have passed the pressure test. The pressure test technology for PE pipes has been very mature, and the main disadvantage is that the pressure test devices in the prior art need to carry out hot melt connection to fix the PE pipes, or need to open connection threads on the PE pipes, etc., and then add a plug at the end of the PE pipe for pressure test, which are all time-consuming and laborious. In the present utility model, the friction force between the umbrella frame and the inner wall of the PE pipe by the multi-layer sealing rubber rings 3 is used to fix the plugging mechanism, and a stable sealing structure is formed by using the multi-layer sealing rubber rings 3, and the overall structure is simple and easy to implement.

[0028] The main rod body 1 is provided with external connection threads, and the push ring 2 is provided with internal connection threads. By rotating the push ring 2 provided on the main rod body 1 forward or backward, the auxiliary support rod 4 is pushed or pulled back, so that the support plate 7 provided at the end of the main support rod 6 abuts against the inner wall of the PE pipe or the support is cancelled.

[0029] One end of the auxiliary support rod 4 is fixed to the push ring 2, and the other end is connected to the middle of the main support rod 6. One end of the main support rod 6 is hinged to the end of the main rod body 1, and a support plate 7 is provided at the other end of the main support rod 6.

[0030] The multi-layer sealing rubber rings 3 are rubber rings, and each layer of rubber ring fits to the inner wall of the PE pipe. Each layer of the sealing rubber ring 3 can be connected to the push ring 2 in a threaded form. It can also be tightened on the push ring 2 in the form of a rubber sleeve, or in other similar mechanical connection forms to fix the sealing rubber ring 3 on the push ring 2.

[0031] An exhaust valve is provided on the exhaust passage 10.

[0032] During actual use, before the pressure test, the PE pipeline 11 to be tested needs to be filled with water and soaked for no less than 12 hours. The purpose of this step is to fully soak the pipeline and reduce the test error caused by the change in pipeline material. Then, place the plugging mechanism into the PE pipeline to be tested. Before that, it is also necessary to change the size of the multi-layer sealing rubber ring 3 according to the inner wall diameter of the PE pipeline to be tested, so that the diameter of the sealing rubber ring 3 is at least equivalent to the inner wall diameter of the PE pipeline to be tested, and make the sealing rubber ring 3 fit to the inner wall of the PE pipeline to be tested. Then rotate the pushing ring 2 so that the pushing ring 2 moves along the main rod body 1 and pushes the auxiliary strut 4 and the main strut 6 to open until the support plate 7 at the end of the main strut 6 fits to the inner wall of the PE pipeline to be tested. Finally, open the exhaust valve, and reduce the pressure in the water pressure test PE pipeline to atmospheric pressure through the exhaust pipeline and maintain it for 60 minutes. During this period, it should be ensured that air does not enter the pipeline. Use the pressure pump 8 to inject water into the PE pipeline 11 to be tested, and slowly raise the pressure of the pipeline to the experimental working pressure and stabilize it for 30 minutes. If the working pressure drops during this period, water can be filled to supplement the pressure, but it shall not be higher than the experimental working pressure, and check whether there is any leakage at the pipeline joints, fittings, etc.

[0033] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A PE pipeline pressure testing device, characterized in that: It includes a water storage tank, a pressurizing pump (8), and a plugging mechanism connected in sequence, and a pressurizing pipeline (9) provided between the pressurizing pump (8) and the plugging head; the plugging mechanism includes a main rod body (1), an umbrella frame connected to the head end of the main rod body (1), and a water injection channel and an exhaust channel (10) are respectively provided on the main rod body (1), and the water injection channel is connected to the pressurizing pipeline (9); the umbrella frame includes a plurality of main struts (6), auxiliary struts (4) connected between each main strut (6) and the main rod body (1), and reinforcing rods (5) between the auxiliary struts (4) and the main struts (6), and a pushing ring (2) is provided at the connection between the auxiliary strut (4) and the main rod body (1), and a plurality of layers of sealing rubber rings (3) are connected to the pushing ring (2).

2. The PE pipeline pressure testing device according to claim 1, characterized in that: External connection threads are provided on the main rod body (1), and internal connection threads are provided on the pushing ring (2).

3. The PE pipeline pressure testing device according to claim 1, characterized in that: One end of the auxiliary strut (4) is fixed to the pushing ring (2), and the other end is connected to the middle of the main strut (6).

4. The PE pipeline pressure testing device according to claim 1, characterized in that: One end of the main strut (6) is hinged to the end of the main rod body (1), and a support plate (7) is provided at the other end of the main strut (6).

5. The PE pipeline pressure testing device according to claim 1, characterized in that: The multi-layer sealing rubber rings (3) are rubber rings, and each layer of rubber ring fits to the inner wall of the PE pipeline.

6. The PE pipeline pressure testing device according to claim 1, characterized in that: An exhaust valve is provided on the exhaust channel (10).

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