Testing system for testing pipeline performance

Abstract

The utility model discloses a test system for testing pipeline performance, which comprises a water tank, the water tank is connected with a water inlet pipe and a water outlet pipe, the water inlet pipe is connected with a water pump and an adjusting valve, the water inlet pipe is connected with a water inlet plug used for being matched with an opening part of a test pipe section, and the middle part of the water outlet pipe comprises a U-shaped hose section. A height adjusting support is arranged at the water outlet end of the U-shaped hose section, the water outlet pipe is connected with a water outlet plug used for being matched with an opening of the test pipe section, ventilation openings are formed in the upper portion of the water inlet plug and the upper portion of the water outlet plug, and an overflow outlet and a bottom connecting opening used for being connected with the water outlet pipe are formed in the water outlet plug. The overflow outlet is higher than the bottom connector and is connected with an overflow pipe, and the overflow pipe is connected with the water tank; the device has the advantages of being good in performance testing effect, capable of simulating various working conditions and easy to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline performance testing, and particularly relates to a test system for testing the performance of pipelines. Background Art

[0002] In engineering cases of chemical wastewater treatment systems, severe corrosion of sewage pipelines often occurs. The main reasons for corrosion are that the chemical wastewater transported by sewage pipelines, especially the water quality containing corrosive substances such as acids and alkalis, causes pipeline corrosion, and there are sulfate-reducing bacteria (SRB) in the sludge of sewage pipelines. These bacteria use the organic matter in the sludge as a carbon source and the hydrogen generated in the bacterial biofilm to reduce sulfate to hydrogen sulfide. The hydrogen sulfide diffuses in the sewage pipeline and reacts with the oxygen in the pipeline to form sulfuric acid, which adheres to the unfilled part of the pipeline, causing corrosion of the unfilled part of the pipeline.

[0003] In the fields of metallurgy, chemical industry, and textile industry, ductile iron pipes are widely used in wastewater treatment systems. Ductile iron pipe sewage pipelines are usually coated with high-aluminum cement mortar lining, enabling the drainage pipe network to have good sewage corrosion resistance and a long service life. As an excellent drainage pipe material, ductile iron pipe sewage pipes have been widely used in the fields of sewage treatment and discharge. Compared with other pipe materials, ductile iron pipes have the advantages of good pressure-bearing performance, corrosion resistance, and sealing performance.

[0004] The problems of the prior art are that it is inconvenient to test the corrosion resistance of metal pipelines after manufacturing, and some only test the corrosion situation under a single working condition, resulting in potential pipeline corrosion hazards; there is a lack of corresponding equipment in the prior art to test the performance of metal pipelines under various working environments. Summary of the Invention

[0005] The purpose of the utility model is to provide a test system for testing the performance of pipelines in view of the problems existing in the prior art, which has the advantages of good performance testing effect, simulating multiple working conditions, and simple operation.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is: a test system for testing the performance of pipelines, including a water tank, the water tank is connected with a water inlet pipe and a water outlet pipe, a water pump and a regulating valve are connected to the water inlet pipe, the water inlet pipe is connected with a water inlet plug for cooperating with the orifice of the test pipe section, the middle part of the water outlet pipe includes a U-shaped hose section, a height-adjusting bracket is arranged at the water outlet end of the U-shaped hose section, the water outlet pipe is connected with a water outlet plug for cooperating with the orifice of the test pipe section, ventilation openings are arranged on the upper parts of the water inlet plug and the water outlet plug, an overflow outlet and a bottom connection port for connecting with the water outlet pipe are opened on the water outlet plug, the height of the overflow outlet is higher than that of the bottom connection port, the overflow outlet is connected with an overflow pipe, and the overflow pipe is connected with the water tank.

[0007] In the above solution, a water tank is used to store and continuously supply experimental water. A water pump on the water inlet pipe is used to continuously transport the water in the water tank to the pipeline. A regulating valve is used to regulate the water flow rate. The water inlet pipe is connected to the mouth of the test pipe section through a water inlet plug. The U-shaped hose section in the middle of the water outlet pipe cooperates with the height adjustment bracket to utilize the principle of communicating vessels to adjust the liquid level height in the test pipe section. The water outlet pipe is connected to the mouth of the test pipe section through a water outlet plug. A ventilation port is provided to ensure that the part above the liquid level in the test pipe section is filled with air. The overflow outlet on the water outlet plug is connected to an overflow pipe to limit the highest liquid level height in the test pipe section, avoid the situation of too high liquid level, and ensure the smooth progress of the test.

[0008] Furthermore, a water distributor is connected to the end of the water inlet pipe. The water distributor includes a number of horizontally arranged water outlet holes and is connected inside the test pipe section.

[0009] By setting the water distributor, the water flow of the water inlet pipe is distributed at multiple points, avoiding scouring the inner wall of the test pipe at a concentrated point, simulating the actual working condition of the rolling pipe, and improving the test effect.

[0010] Furthermore, the height adjustment bracket includes a base. A column is provided on the top surface of the base. A connecting block is slidably arranged on the column. A locking screw for cooperating with the column is screwed on the connecting block, and a pipe clamp is connected to the connecting block.

[0011] The column is supported and positioned by the base. The connecting block is slidably arranged on the column, and the height can be slidably adjusted. The height position is locked by the locking screw. The U-shaped hose section is clamped and connected by the pipe clamp, which is convenient for adjusting the liquid level height in the test pipe section by adjusting the height of the water outlet end of the U-shaped hose section.

[0012] Furthermore, a scale line one is provided on the column for cooperating with the connecting block.

[0013] By providing the scale line one on the column to cooperate with the connecting block, it is convenient for adjusting the height of the water outlet end of the U-shaped hose section.

[0014] Furthermore, the water inlet plug and the water outlet plug include flange plates, and the flange plates are connected to the end face of the test pipe section through fasteners.

[0015] The water inlet plug and the water outlet plug include a flange plate structure, which is convenient for connection and fixation through fasteners.

[0016] Furthermore, an observation window is provided in the middle of the water outlet plug, and a scale line two is provided at the observation window.

[0017] An observation window is opened in the middle of the water outlet plug and the scale line two is provided to facilitate accurately reading the liquid level height in the test pipe section and ensure the test effect.

[0018] Further, the ventilation port includes a hole groove opened in the upper part of the flange plate, and the overflow outlet is located at the middle height of the test pipe section.

[0019] Opening a hole groove in the upper part of the flange plate facilitates air circulation, and the overflow outlet located at the middle height facilitates controlling the maximum liquid level height not to exceed half, thereby ensuring sufficient space in the upper part of the test pipe for sulfuric acid corrosion and facilitating the observation of experimental results.

[0020] Further, a flow meter is provided on the water inlet pipe, and the water pump includes a timer.

[0021] By setting the flow meter to count the total water flow in the test pipe section, and by setting the timer, it is convenient to control the total test duration.

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] 1. By setting a water tank, a water inlet pipe, a water outlet pipe, a water pump, a water inlet plug, and a water outlet plug to connect the test pipe section, a continuous flowing water environment is formed at the test pipe section to simulate the actual working conditions and perform the performance test of the test pipe section, solving the problem that the existing corrosion test system cannot accurately simulate the actual operating environment of the sewage pipe under different fullness conditions. It can simulate the sewage transportation pipeline system and provide test information for the corrosion resistance of ductile iron pipe sewage pipes under different fullness conditions, with good performance test effects;

[0024] 2. By setting a water pump, a regulating valve, a U-shaped hose section and a height adjusting bracket, it is convenient to adjust the liquid level height in the test pipe section, simulate various working environments, with simple operation and good test effects; by setting a scale line one at the height adjusting bracket and a scale line two at the water outlet plug, the liquid level height can be visually observed, with simple operation;

[0025] 3. The device has a simple structure, is easy to use, and is suitable for multi-condition testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a test system for testing the performance of a pipeline according to Embodiment 1 of the present utility model;

[0027] Figure 2 It is a schematic structural diagram of the height adjusting bracket in Embodiment 1 of the present utility model;

[0028] Figure 3 It is a schematic structural diagram of the water distributor in Embodiment 1 of the present utility model;

[0029] Figure 4Structural schematic diagram of the height adjustment bracket in Embodiment 2 of the present utility model;

[0030] Figure 5 Structural schematic diagram of the water outlet plug in Embodiment 2 of the present utility model;

[0031] Figure 6 Structural schematic diagram of the water inlet plug in Embodiment 2 of the present utility model;

[0032] In the figure: 1, water tank; 2, water inlet pipe; 3, water outlet pipe; 4, water pump; 5, regulating valve; 6, water inlet plug; 7, U-shaped hose section; 8, water outlet plug; 9, ventilation port; 10, overflow pipe; 11, water distributor; 12, water outlet hole; 13, base; 14, column; 15, connecting block; 16, locking screw; 17, pipe clamp; 18, scale line 1; 19, fastener; 20, observation window; 21, scale line 2; 22, hole groove; 23, flowmeter; 24, test pipe section. Detailed implementation mode

[0033] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work conditions belong to the scope of protection of the present utility model. In the description of the present utility model, it should be noted that the terms front, back, left, right, etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0034] Embodiment 1

[0035] As Figures 1-3As shown in the figure, a test system for testing the performance of pipelines includes a water tank 1, which is connected with a water inlet pipe 2 and a water outlet pipe 3. A water pump 4 and a regulating valve 5 are connected to the water inlet pipe 2. The water inlet pipe 2 is connected with a water inlet plug 6 for mating with the mouth of the test pipe section 24. The middle part of the water outlet pipe 3 includes a U-shaped hose section 7. A height-adjusting bracket is arranged at the water outlet end of the U-shaped hose section 7. The water outlet pipe 3 is connected with a water outlet plug 8 for mating with the mouth of the test pipe section 24. Vent holes 9 are arranged on the upper parts of the water inlet plug 6 and the water outlet plug 8. An overflow outlet and a bottom connection port for connecting with the water outlet pipe 3 are arranged on the water outlet plug 8. The height of the overflow outlet is higher than that of the bottom connection port. The overflow outlet is connected with an overflow pipe 10, and the overflow pipe 10 is connected with the water tank 1.

[0036] In the above solution, the water tank 1 is used to store and continuously supply experimental water. The water pump 4 on the water inlet pipe 2 is used to continuously convey the water in the water tank 1 to the pipeline. The regulating valve 5 is used to adjust the water flow rate. The water inlet plug 6 is used to connect the water inlet pipe 2 with the mouth of the test pipe section 24. The U-shaped hose section 7 in the middle of the water outlet pipe 3 cooperates with the height-adjusting bracket to adjust the liquid level height in the test pipe section 24 by using the principle of communicating vessels. The water outlet pipe 3 is connected with the mouth of the test pipe section 24 through the water outlet plug 8. The vent holes 9 are arranged to ensure that the part above the liquid level in the test pipe section 24 is filled with air. The overflow outlet on the water outlet plug 8 is connected with the overflow pipe 10 to limit the highest liquid level height in the test pipe section 24, avoid the situation of too high liquid level, and ensure the smooth progress of the test.

[0037] After opening the valve of the water tank 1, the frequency-converting constant-pressure pump, the flowmeter 23 and the flow regulating valve 5 and running them, sewage is injected into the test pipeline. The fullness is adjusted through the water outlet end of the U-shaped hose section 7. When the sewage liquid level reaches the set measurement height, the sewage starts to flow out from the water outlet pipe 3.

[0038] By controlling the sizes of the frequency-converting constant-pressure pump and the flow regulating valve 5, the flow velocity, and the height of the water outlet end of the U-shaped hose section 7, different fullness degrees of sewage in the ductile iron pipe sewage pipe section are simulated. Through this device, the test on the sewage corrosion resistance performance of the ductile iron pipe sewage pipe section under different fullness degrees of the cement mortar lining and the sealing rubber ring can be carried out.

[0039] Take DN200 pipe sections with ordinary Portland cement mortar lining and high-alumina cement mortar lining, and cut test pipe sections 24 with a length of 0.5 ± 0.1 meters respectively. Before the test, the pipe sections are immersed in water at ambient temperature for about 24 hours. Soft water or deionized water is added to the pipe sections to monitor and adjust the Ca ion concentration, and the concentration should not be greater than 200 mg / L. After treatment, the initial thickness of the cement mortar lining is measured.

[0040] Measure the thickness of the cement mortar lining. After the test, observe and measure the cement mortar lining, synthetic resin coating and rubber sealing ring.

[0041] Prepare sulfuric acid solution with pH 3 and sodium hydroxide solution with pH 13 respectively to simulate sewage or actual sewage (which can be prepared or taken according to experimental needs) and inject it into water tank 1. Under the action of water pump 4, inject it into the ductile iron pipe test section 24 to conduct the corrosion test. During operation, regularly monitor and adjust the pH of the solution to ensure that the change in pH (relative to the initial value) is not greater than ±0.3.

[0042] Except for the pipes only used for conveying rainwater, when the pipes and pipe fittings are tested as above, they should be exposed to acid solution and alkali solution for 6 months respectively and then inspected to see if they meet the requirements: the reduction value of the thickness of the cement mortar lining should not be greater than 0.2 mm; there should be no obvious cracks in the rubber sealing ring; the hardness, tensile strength and elongation should meet the provisions of GB / T 21873.

[0043] During the test, the test section 24 is placed horizontally on the support or positioned by the pipe clamp 17. The lining material of the test section 24 can be ordinary portland cement, sulfuric acid-resistant cement or high-alumina cement.

[0044] The height of the overflow pipe 10 is higher than the height of the outlet pipe 3. The inlet plug 6 and the outlet plug 8 are snap-connected to the test section 24.

[0045] Furthermore, a water distributor 11 is connected to the end of the inlet pipe 2. The water distributor 11 includes a plurality of horizontally arranged water outlet holes 12, and the water distributor 11 is connected inside the test section 24.

[0046] By setting the water distributor 11, the water flow of the inlet pipe 2 is distributed at multiple points, avoiding scouring the inner wall of the test pipe at a single point, simulating the actual working condition of the rolling pipe, and improving the test effect.

[0047] Furthermore, the height-adjusting support includes a base 13. A column 14 is arranged on the top surface of the base 13. A connecting block 15 is slidably arranged on the column 14. A locking screw 16 for cooperating with the column 14 is screwed on the connecting block 15, and a pipe clamp 17 is connected to the connecting block 15.

[0048] The column 14 is supported and positioned by the base 13. The connecting block 15 is slidably arranged on the column 14, and the height can be slidably adjusted. The height position is locked by the locking screw 16. The U-shaped hose section 7 is clamped and connected by the pipe clamp 17, which is convenient for adjusting the liquid level height in the test section 24 by adjusting the height of the water outlet end of the U-shaped hose section 7.

[0049] The U-shaped hose section 7 is a corrosion-resistant metal hose. The inlet pipe 2 and the outlet pipe 3 can be made of PP pipes.

[0050] Further, a flow meter 23 is provided on the water inlet pipe 2, and the water pump 4 includes a timer.

[0051] By setting the flow meter 23, the total water flow in the test pipe section 24 is counted, and by setting the timer, it is convenient to control the total test duration.

[0052] The water pump 4 including a timer and the flow meter 23 can both be directly purchased in the market. The water pump 4 is preferably a variable frequency constant pressure pump.

[0053] Embodiment 2

[0054] As Figures 4-6 shown, a test system for testing the performance of a pipeline in this embodiment is further modified as follows on the basis of Embodiment 1:

[0055] Further, a first scale line 18 is provided on the column 14, and the first scale line 18 is used to cooperate with the connecting block 15.

[0056] By providing the first scale line 18 on the column 14 to cooperate with the connecting block 15, it is convenient to adjust the height of the water outlet end of the U-shaped hose section 7.

[0057] Further, the water inlet plug 6 and the water outlet plug 8 include flange plates, and the flange plates are connected to the end face of the test pipe section 24 through fasteners 19.

[0058] The water inlet plug 6 and the water outlet plug 8 include a flange plate structure, which is convenient for connection and fixation through the fasteners 19.

[0059] The fastener 19 includes a bolt. A fastening hole is provided in the outer circle of the flange plate, and a threaded hole corresponding to the fastening hole is provided in the end face of the test pipe section 24 to connect the bolt. A rubber ring is provided on the flange plate for sealing at the connection.

[0060] Further, an observation window 20 is provided in the middle of the water outlet plug 8, and a second scale line 21 is provided at the observation window 20.

[0061] An observation window 20 is opened in the middle of the water outlet plug 8 and the second scale line 21 is provided to facilitate accurately reading the liquid level height in the test pipe section 24 and ensure the test effect.

[0062] Further, the vent 9 includes a hole groove 22 opened in the upper part of the flange plate, and the overflow outlet is located at the middle height of the test pipe section 24.

[0063] By opening the hole groove 22 in the upper part of the flange plate, it is convenient for air circulation. The overflow outlet is located at the middle height, which is convenient for controlling the maximum liquid level height not to exceed half, so as to ensure sufficient space above the test pipeline for sulfuric acid corrosion and facilitate observing the experimental results.

[0064] The overflow pipe 10 can also use a flexible metal hose and be equipped with a height adjustment bracket for adjusting the maximum liquid level height.

[0065] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test system for testing the performance of a pipeline, characterized in that, It includes a water tank, which is connected with a water inlet pipe and a water outlet pipe. A water pump and a regulating valve are connected to the water inlet pipe. The water inlet pipe is connected with a water inlet plug for cooperating with the mouth of the test pipe section. The middle part of the water outlet pipe includes a U-shaped hose section. A height-adjusting bracket is arranged at the water outlet end of the U-shaped hose section. The water outlet pipe is connected with a water outlet plug for cooperating with the mouth of the test pipe section. Vent holes are arranged at the upper parts of the water inlet plug and the water outlet plug. An overflow outlet and a bottom connection port for connecting with the water outlet pipe are arranged on the water outlet plug. The height of the overflow outlet is higher than that of the bottom connection port. The overflow outlet is connected with an overflow pipe, and the overflow pipe is connected with the water tank.

2. The test system for testing the performance of a pipeline according to claim 1, wherein, The end of the water inlet pipe is connected with a water distributor, which includes a number of horizontally arranged water outlet holes, and the water distributor is connected inside the test pipe section.

3. The test system for testing the performance of a pipeline according to claim 1, characterized in that, The height-adjusting bracket includes a base. A column is arranged on the top surface of the base. A connecting block is slidably arranged on the column. A locking screw for cooperating with the column is screwed on the connecting block. A pipe clamp is connected to the connecting block.

4. The test system for testing the performance of a pipeline according to claim 3, characterized in that, Scale line one is arranged on the column for cooperating with the connecting block.

5. The test system for testing the performance of a pipeline according to claim 1, characterized in that, The water inlet plug and the water outlet plug include flange plates, and the flange plates are connected with the end faces of the test pipe section through fasteners.

6. The test system for testing the performance of a pipeline according to claim 4, wherein An observation window is arranged in the middle of the water outlet plug, and scale line two is arranged at the observation window.

7. The test system for testing the performance of a pipeline according to claim 5, characterized in that, The vent hole includes a hole groove opened at the upper part of the flange plate, and the overflow outlet is located at the middle height of the test pipe section.

8. The test system for testing the performance of a pipeline according to claim 1, wherein A flowmeter is arranged on the water inlet pipe, and the water pump includes a timer.

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