CN204630834U - A kind of plastic inspection well weld strength test unit - Google Patents

Abstract

The utility model relates to a welding strength testing device for a plastic inspection well, which belongs to the field of product performance testing and testing. The utility model includes a water tank, a workbench, a sealing ring, a water injection hole, a plastic inspection well, a locking hoop, a water pump, a motor, a two-position three-way electromagnetic reversing valve, a pressure regulating and limiting valve; the water tank is fixed on the foundation, and the working The table is installed on the frame, the sealing ring is installed on the workbench, and there is a water injection hole on the workbench. The plastic inspection well is installed on the upper part of the workbench through the locking hoop. There is a weld at the joint of the plastic inspection well body, and the water pump and The motor, the two-position three-way electromagnetic reversing valve and the pressure regulating and limiting valve are integrated and fixed on the water tank, and the pressure water pipe is connected with the water injection hole. The device of the utility model is simple and reliable, occupies a small area, is not limited by the height of the inspection well, is convenient and simple to operate, and has low manufacturing cost.

Description

A plastic inspection well welding strength test device

technical field

The utility model relates to a welding strength testing device for a plastic inspection well, which belongs to the field of product performance testing and testing.

Background technique

Inspection wells, commonly known as "cellar wells", are shafts built at intervals of underground pipelines. They are one of the underground infrastructures of urban roads. They are mainly used for maintenance of pipelines, removal of sludge, and connection of pipelines in different directions and heights. The structures used. Most of them are located at bends, pipe junctions, pipe diameter or slope changes, water drops, and straight pipe sections. Due to its good sealing performance, the plastic inspection well can be constructed around the clock without being restricted by the weather. It can be combined separately, and the height can be adjusted up and down. With the advantages of low cost and other advantages, it gradually replaced the inspection well of the traditional brick structure or reinforced concrete structure. Butt welding is usually required in the production process of plastic inspection wells, so welding seams will be produced. However, affected by factors such as material properties, welding temperature, and operating level, the welds often have virtual welding, false welding, and impenetrable welding. , in order to ensure the overall strength of the plastic inspection well, that is, to ensure the strength of the weld, the strength of the weld must be tested. However, due to the lack of special detection devices for the welding strength of plastic inspection wells, the welding strength detection of existing plastic inspection wells is mostly completed by traditional mechanical tensile testing devices, which have complex structures, cumbersome operations, and poor reliability. In order to solve this problem, it is necessary to design a special device for testing and detecting the strength of plastic inspection well welding seam.

Utility model content

The purpose of this utility model is to provide a hydraulic type plastic inspection well welding strength special test device to complete the test and detection of the welding seam strength of the plastic inspection well, so as to overcome the shortcomings of the traditional plastic inspection well welding strength detection device with complex structure and cumbersome operation and insufficient.

The utility model is realized according to the following technical scheme: a plastic inspection well welding strength test device, including a water tank 1, a workbench 2, a sealing ring 3, a water injection hole 4, a plastic inspection well 5, a locking hoop 7, a water pump 8, and a motor 9. Two-position three-way electromagnetic reversing valve 10, pressure regulating and pressure limiting valve 11; the water tank 1 is fixed on the foundation through anchor bolts, the workbench 2 is installed on the frame 1 through bolts, and the sealing ring 3 is installed on the workbench 2 On the workbench 2, there is a water injection hole 4, the plastic inspection well 5 is installed on the upper part of the workbench 2 through the locking hoop 7, the joint of the plastic inspection well 5 cylinder is provided with a weld 6, the water pump 8 and the motor 9, two The position three-way electromagnetic reversing valve 10 and the pressure regulating and limiting valve 11 are integrated and fixed on the water tank 1, and its pressure water pipe is connected with the water injection hole 4.

The detection method of the plastic inspection well welding strength test device is to first place the prepared plastic inspection well 5 on the workbench 2 with the wellhead facing down, and lock and fix the plastic inspection well 5 on the workbench 2 with the locking hoop 7, so that To ensure that the wellhead is reliably sealed and does not fall off when pressurized, set the pressure value of the pressure regulating and limiting valve 11, turn on the motor 9, the two-position three-way electromagnetic reversing valve 10 is energized, and the 4-way water injection hole opened on the workbench 2 Fill the plastic inspection well 5 with pressurized water to a given pressure, keep the pressure for a given time, and observe whether there are cracks, breaks, damages, or deformations at the joint weld 6 of the plastic inspection well 5 barrel, so as to achieve the purpose of checking the plastic inspection well 5 Testing of weld strength.

The working principle of a plastic inspection well welding strength test device is as follows: when the plastic inspection well 5 is filled with high-pressure water, the high-pressure water acts on the surrounding walls of the plastic inspection well 5, and the hydraulic forces acting on the radial direction of the well bore wall interact with each other. The balance cancels out, but makes the barrel swell. The hydraulic force acting on the top of the wellbore wall is vertically upward, making the wellbore have a tendency to stretch upward in the axial direction, and the lower part of the wellbore body is consolidated with the workbench 2 through the locking hoop 7, acting on the workbench at the lower part of the wellbore wall The force of water pressure on 2, the direction is vertically downward, makes the wellbore have a tendency to stretch downward axially, so that the cylinder of the plastic inspection well 5 is subjected to axially upward and downward forces, which make the plastic The inspection well 5 produces axial tension, and the weld 6 is the weak point under the axial tension, and the weld 6 of the plastic inspection well 5 should be damaged first. Therefore, high-pressure water injection pressurization has achieved the purpose of weld strength test detection.

The utility model has the following beneficial effects:

1. The interface seal of the experimental device adopts a double-stage seal and a hoop to lock the seal, which can better ensure the reliability of the seal and the safety of the test;

2. The equipment is simple and reliable, occupies a small area, and is not limited by the height of the inspection well;

3. The operation is convenient and simple, and the cost is low.

Description of drawings

Fig. 1 is the structural representation of the test device of the present utility model;

Fig. 2 is the structural schematic diagram of the test detection working principle of the present utility model;

Fig. 3 is a schematic structural diagram of the test detection water hydraulic control principle of the utility model.

The labels in the figure are: 1: water tank, 2: workbench, 3: sealing ring, 4: water injection hole, 5: plastic inspection well, 6: welding seam, 7: locking hoop, 8: water pump, 9: motor , 10: Two-position three-way electromagnetic reversing valve, 11: Pressure regulating and limiting valve.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model will be further described, but the content of the utility model is not limited to said range.

Example 1: As shown in Figure 1-3, a plastic inspection well welding strength test device, including a water tank 1, a workbench 2, a sealing ring 3, a water injection hole 4, a plastic inspection well 5, a locking hoop 7, and a water pump 8. Motor 9, two-position three-way electromagnetic reversing valve 10, pressure regulating and pressure limiting valve 11; the water tank 1 is fixed on the foundation through anchor bolts, the workbench 2 is installed on the frame 1 through bolts, and the sealing ring 3 is installed on the On the workbench 2, there is a water injection hole 4 on the workbench 2, the plastic inspection well 5 is installed on the upper part of the workbench 2 through the locking hoop 7, the plastic inspection well 5 cylinder joint is provided with a weld 6, the water pump 8 and the motor 9. The two-position three-way electromagnetic reversing valve 10 and the pressure regulating and limiting valve 11 are integrated and fixed on the water tank 1 , and the pressure water pipe thereof is connected to the water injection hole 4 .

Example 2: As shown in Figure 1-3, a plastic inspection well welding strength test device, including a water tank 1, a workbench 2, a sealing ring 3, a water injection hole 4, a plastic inspection well 5, a locking hoop 7, and a water pump 8. Motor 9, two-position three-way electromagnetic reversing valve 10, pressure regulating and limiting valve 11; water tank 1 is fixed on the foundation by bolts, workbench 2 is installed on frame 1 by screws, and sealing ring 3 is installed on the workbench 2, the workbench 2 is provided with a water injection hole 4, the plastic inspection well 5 is installed on the upper part of the workbench 2 through the locking hoop 7, the joint of the plastic inspection well 5 cylinder is provided with a weld 6, the water pump 8 and the motor 9, The two-position three-way electromagnetic reversing valve 10 and the pressure regulating and limiting valve 11 are integrated and fixed on the water tank 1 , and the pressure water pipe thereof is connected with the water injection hole 4 .

Claims (1)

1. a plastic inspection well weld strength test unit, is characterized in that: comprise water tank (1), worktable (2), O-ring seal (3), water injection hole (4), plastic inspection well (5), locking anchor ear (7), water pump (8), motor (9), two position, three-way electromagnetic change valve (10), pressure-regulating and pressuring-limiting valve (11); Water tank (1) is fixed on ground, worktable (2) is arranged in frame (1), O-ring seal (3) is arranged on worktable (2), worktable (2) offers water injection hole (4), plastic inspection well (5) is arranged on worktable (2) top by locking anchor ear (7), plastic inspection well (5) cylindrical shell junction is provided with weld seam (6), water pump (8) is connected with motor (9), two position, three-way electromagnetic change valve (10) and pressure-regulating and pressuring-limiting valve (11) and is integratedly fixed on water tank (1), and its penstocks are connected with water injection hole (4).