A functional rubber sealing ring for HDPE bellows flow monitoring

Abstract

The present invention discloses a functional rubber sealing ring for HDPE corrugated pipe flow monitoring, belonging to the field of sealing ring technology, comprising a rubber ring, an electromagnetic flowmeter upper part, a transmitter, an electromagnetic flowmeter lower part, a processor, and a conductor. The rubber ring is made of thermoplastic vulcanized rubber granules. The electromagnetic flowmeter upper part, the transmitter, the electromagnetic flowmeter lower part, and the processor are sequentially connected in series via a conductor and pre-buried in the rubber ring. The conductor is composed of a steel wire and a signal line. The present invention uses thermoplastic vulcanized rubber granules as the material of the rubber ring and adopts a conductor design composed of a steel wire and a signal line, thereby synergistically enhancing the resistance of the rubber sealing ring and the entire pipeline to abnormal deformation. The use of a pre-buried electromagnetic flowmeter upper part, transmitter, electromagnetic flowmeter lower part, and processor design ensures that the rubber sealing ring can monitor the flow inside the pipeline in real time, can promptly detect water seepage, and reduce safety hazards.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing rings, and in particular relates to a functional rubber sealing ring for flow monitoring of HDPE corrugated pipes. Background Art

[0002] HDPE corrugated pipe is a new type of lightweight pipe made from high-density polyethylene. It features lightweight, high-pressure resistance, excellent toughness, fast construction, and long service life. Its superior wall structure significantly reduces costs compared to other pipe structures. Its convenient and reliable connection has led to its widespread use, replacing concrete and cast iron pipes. With the continued expansion of environmental protection projects, HDPE corrugated pipe is widely used in the construction of water supply and drainage, sewage, and exhaust facilities. Drainage pipes consist of a main pipe body and a sleeve that connects two sections of the pipe body. To achieve a waterproof seal between the pipe body and the sleeve, a rubber sealing ring is typically installed between the pipe body and the sleeve to prevent water seepage.

[0003] Existing rubber seals for HDPE corrugated pipes typically employ an interference fit between the rubber seal and the pipe, leveraging the seal's own deformation for secure connection and sealing. However, during use, uneven force can easily cause the rubber seal and pipe to deform abnormally, creating gaps between the seal and pipe, leading to water seepage. This water seepage may not be noticeable during initial site inspections, but over time, water seepage at the joints can cause soil loss and, in severe cases, ground collapse and wastewater overflow, resulting in irreversible environmental damage.

[0004] Currently, watertightness tests in the HDPE corrugated pipe industry are generally conducted under ideal conditions. Once abnormal deformation occurs, there is no timely tracking or verification of construction specifications, which still poses a significant safety hazard. Furthermore, watertightness tests are generally performed after pipe installation. However, since abnormal deformation is caused by cumulative or later external forces, it is impossible to accurately monitor whether the pipe is leaking after construction is completed, which also poses a significant safety hazard. Summary of the Invention

[0005] The object of the present invention is to provide a functional rubber sealing ring for flow monitoring of HDPE bellows to solve the problems in the background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A functional rubber seal for HDPE corrugated pipe flow monitoring includes a rubber ring, an upper electromagnetic flowmeter, a transmitter, a lower electromagnetic flowmeter, a processor, and a wire. The rubber ring is made of thermoplastic vulcanized rubber granules. The upper electromagnetic flowmeter, transmitter, lower electromagnetic flowmeter, and processor are connected in series via a wire composed of a steel wire and a signal line and pre-buried in the rubber ring. The upper and lower electromagnetic flowmeter parts combine to measure the volume flow of the liquid medium inside the pipe.

[0008] The rubber ring provides sealing for the pipe installation and covers the upper part of the electromagnetic flowmeter, the transmitter, the lower part of the electromagnetic flowmeter, the processor, and the wire assembly; the pre-buried electromagnetic flowmeter design can monitor the internal flow of the pipeline at each joint node to achieve all-round monitoring; the pre-buried processor and transmitter design can not only collect and store the electromagnetic flowmeter measurement data in real time, but also send the measured data to the ground cloud processor in real time according to the set requirements, so that the cloud processor can analyze the collected big data and make judgments.

[0009] As a further embodiment of the present invention, the thermoplastic vulcanized rubber granules include the following raw materials in parts by weight: 70-80 parts of natural rubber, 30-34 parts of polypropylene granules, 0.15-0.17 parts of antioxidant 1010, 0.7-0.8 parts of methylhexahydrophthalic anhydride (crosslinking agent), 0.35-0.4 parts of trimethylolpropane trimethacrylate (crosslinking accelerator), and 0.1-0.12 parts of initiator.

[0010] As a further embodiment of the present invention, the initiator is any one of ammonium persulfate and potassium persulfate.

[0011] As a further embodiment of the present invention, the thermoplastic vulcanized rubber pellets are prepared by the following steps:

[0012] Step 1: Weigh the raw materials according to the formula, add natural rubber, polypropylene pellets and antioxidant 1010 into an internal mixer and mix them, then cool to 23±2°C to obtain a rubber-plastic blend;

[0013] Step 2: After the rubber-plastic blend is conveyed to an open mill for roll wrapping, methyl hexahydrophthalic anhydride, trimethylolpropane trimethacrylate and an initiator are added, and triangular packages are made 11-13 times. The mixture is cut into strips, conveyed to a twin-screw extruder for dynamic vulcanization, and then conveyed to a granulator for shear granulation to obtain thermoplastic vulcanized rubber pellets. The thermoplastic vulcanized rubber pellets prepared by dynamic vulcanization are dispersed in a polypropylene continuous phase in the form of cross-linked natural rubber nanoparticle aggregates, showing a network structure. The network structure effect of the rubber nanoparticle aggregates increases the hardness of the thermoplastic vulcanized rubber pellets, thereby improving the ability of the rubber sealing ring to resist abnormal deformation.

[0014] As a further solution of the present invention, the rotor speed of the internal mixer in step 1 is 300-350 rpm, the mixing temperature is 150-155° C., and the mixing time is 10-13 min.

[0015] As a further solution of the present invention, the roller temperature of the open mill in step 2 is 23±2°C, the temperature of the twin-screw extruder is 150-155°C, and the rotation speed is 400-500r / min.

[0016] As a further embodiment of the present invention, a functional rubber sealing ring for HDPE corrugated pipe flow monitoring is prepared by the following steps:

[0017] A steel wire is combined with a signal line to form a conductor. The conductor then connects the upper electromagnetic flowmeter, transmitter, lower electromagnetic flowmeter, and processor in series. The conductor is then placed into an O-ring mold along with thermoplastic vulcanized rubber pellets for compression molding. After cooling and forming, the mold is removed and trimmed to create a functional rubber seal for flow monitoring in HDPE bellows. The upper electromagnetic flowmeter, transmitter, lower electromagnetic flowmeter, and processor are all pre-embedded during the molding process. Once installed in the ground with the pipeline, they remain functional for years. This pre-embedded design effectively ensures the longevity of the electromagnetic flowmeter, processor, and transmitter. The conductor, which connects the upper electromagnetic flowmeter, transmitter, lower electromagnetic flowmeter, and processor, is constructed with a rigid and tough steel wire that not only meets signal transmission requirements but also provides rigidity for the rubber seal. It also effectively dissipates some external pressure from the pipeline, enhancing its overall resistance to abnormal deformation.

[0018] As a further solution of the present invention, the molding temperature is 150-155° C., the pressure is 18-20 MPa, and the time is 4-5 minutes.

[0019] Beneficial effects of the present invention:

[0020] The thermoplastic vulcanized rubber granules prepared by blending natural rubber and polypropylene granules and dynamically vulcanizing the thermoplastic vulcanized rubber granules are dispersed in a polypropylene continuous phase in the form of cross-linked natural rubber nanoparticle aggregates, exhibiting a network structure. The network structure effect of the rubber nanoparticle aggregates increases the hardness of the thermoplastic vulcanized rubber granules. The thermoplastic vulcanized rubber granules used as the material of the rubber ring enhance the ability of the rubber sealing ring to resist abnormal deformation.

[0021] The present invention enhances the supporting capacity of the rubber sealing ring and further enhances the ability of the rubber sealing ring and the pipeline as a whole to resist abnormal deformation through a conductor design composed of a steel wire and a signal line.

[0022] The upper part of the electromagnetic flowmeter, the transmitter, the lower part of the electromagnetic flowmeter, and the processor are all pre-buried as a whole during the molding stage. After being installed on the ground with the pipeline, they can ensure effective operation for a long time. The overall pre-buried design effectively guarantees the service life of the electromagnetic flowmeter, the transmitter, and the processor. When the functional rubber sealing ring for HDPE corrugated pipe flow monitoring of the present invention is used, the transmitter integrates the data provided by the processor and sends it to the ground, which is received by the signal receiving tower and then sent to the cloud processor. The cloud processor monitors and tracks the pipeline after the overall installation and use in real time. During cloud processing, the data sent back by the first transmitter is compared and calculated with the data sent back by more transmitters to see whether there is a decrease or other changes in the overall flow, and a comprehensive judgment is made on whether the pipeline is leaking, ensuring that the rubber sealing ring can monitor the flow inside the pipeline in real time, can detect water seepage in time, take preventive measures early, and reduce safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic structural diagram of a functional rubber sealing ring for HDPE bellows flow monitoring in Example 4.

[0025] In the accompanying drawings, the structures represented by the reference numerals are listed as follows:

[0026] 1. Rubber ring; 2. Upper part of electromagnetic flowmeter; 3. Transmitter; 4. Lower part of electromagnetic flowmeter; 5. Processor; 6. Wire. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] Example 1

[0029] A thermoplastic vulcanized rubber granular material comprises the following steps of preparation:

[0030] Step 1: Weigh the raw materials according to the formula, add 70 kg of natural rubber, 30 kg of polypropylene pellets and 0.15 kg of antioxidant 1010 into an internal mixer (the rotor speed of the internal mixer is 300 rpm), mix at 150°C for 10 minutes, and then cool to 23±2°C to obtain a rubber-plastic blend;

[0031] Step 2: The rubber-plastic blend is conveyed to an open mill (roller temperature is 23±2°C) for rolling, and then 0.7kg of methylhexahydrophthalic anhydride, 0.35kg of trimethylolpropane trimethacrylate, and 0.1kg of ammonium persulfate and potassium persulfate are added. Triangular packages are performed 11 times, and the mixture is cut into strips. The mixture is conveyed to a twin-screw extruder for dynamic vulcanization (the temperature of the twin-screw extruder is 150°C and the speed is 400r / min), and then conveyed to a granulator for shearing and granulation to obtain thermoplastic vulcanized rubber pellets.

[0032] Example 2

[0033] A thermoplastic vulcanized rubber granular material comprises the following steps of preparation:

[0034] Step 1: Weigh the raw materials according to the formula, add 80 kg of natural rubber, 34 kg of polypropylene pellets and 0.17 kg of antioxidant 1010 into an internal mixer (the rotor speed of the internal mixer is 350 rpm), mix at 155°C for 13 minutes, and then cool to 23±2°C to obtain a rubber-plastic blend;

[0035] Step 2: The rubber-plastic blend is conveyed to an open mill (roller temperature is 23±2°C) for rolling, and then 0.8kg of methylhexahydrophthalic anhydride, 0.4kg of trimethylolpropane trimethacrylate, and 0.12kg of ammonium persulfate and potassium persulfate are added. The mixture is triangularly packaged 13 times, cut into strips, and conveyed to a twin-screw extruder for dynamic vulcanization (the temperature of the twin-screw extruder is 155°C and the speed is 500r / min). After that, it is conveyed to a granulator for shearing and granulation to obtain thermoplastic vulcanized rubber pellets.

[0036] Example 3

[0037] A thermoplastic vulcanized rubber granular material comprises the following steps of preparation:

[0038] Step 1: Weigh the raw materials according to the formula, add 75 kg of natural rubber, 32.5 kg of polypropylene pellets and 0.16 kg of antioxidant 1010 into an internal mixer (the rotor speed of the internal mixer is 325 rpm), mix them at 152.5 ° C for 11.5 min, and then cool to 23 ± 2 ° C to obtain a rubber-plastic blend;

[0039] Step 2: The rubber-plastic blend is conveyed to an open mill (roller temperature is 23±2°C) for rolling, and then 0.75kg of methylhexahydrophthalic anhydride, 0.375kg of trimethylolpropane trimethacrylate, and 0.11kg of ammonium persulfate and potassium persulfate are added. The mixture is triangularly packaged 12 times, cut into strips, and conveyed to a twin-screw extruder for dynamic vulcanization (the temperature of the twin-screw extruder is 152.5°C and the speed is 450r / min). After that, it is conveyed to a granulator for shearing and granulation to obtain thermoplastic vulcanized rubber pellets.

[0040] Example 4

[0041] See also Figure 1 As shown, a functional rubber sealing ring for HDPE corrugated pipe flow monitoring includes a rubber ring 1, an electromagnetic flowmeter upper part 2, a transmitter 3, an electromagnetic flowmeter lower part 4, a processor 5, and a wire 6. The electromagnetic flowmeter upper part 2, the transmitter 3, the electromagnetic flowmeter lower part 4, and the processor 5 are sequentially connected in series through the wire 6 and pre-buried in the rubber ring 1. The wire 6 is composed of a steel wire and a signal line.

[0042] Example 5

[0043] A functional rubber sealing ring for HDPE corrugated pipe flow monitoring is prepared by the following steps:

[0044] A steel wire and a signal line are combined into a conductor 6, and the upper part 2 of the electromagnetic flowmeter, the transmitter 3, the lower part 4 of the electromagnetic flowmeter, and the processor 5 are connected in series in sequence using the conductor 6. Then, the conductor 6 is placed in an O-ring mold together with the thermoplastic vulcanized rubber pellets prepared in Example 1 and molded (the molding temperature is 150°C and the pressure is 18 MPa) for 4 minutes. After cooling and molding, the conductor 6 is removed from the mold and trimmed to obtain a functional rubber sealing ring for HDPE bellows flow monitoring.

[0045] Example 6

[0046] A functional rubber sealing ring for HDPE corrugated pipe flow monitoring is prepared by the following steps:

[0047] A steel wire and a signal line are combined into a conductor 6, and the upper part 2 of the electromagnetic flowmeter, the transmitter 3, the lower part 4 of the electromagnetic flowmeter, and the processor 5 are connected in series in sequence using the conductor 6. Then, the conductor 6 is placed in an O-ring mold together with the thermoplastic vulcanized rubber pellets prepared in Example 2 and molded (the molding temperature is 155°C and the pressure is 20 MPa) for 5 minutes. After cooling and molding, the conductor 6 is removed from the mold and trimmed to obtain a functional rubber sealing ring for HDPE bellows flow monitoring.

[0048] Example 7

[0049] A functional rubber sealing ring for HDPE corrugated pipe flow monitoring is prepared by the following steps:

[0050] A steel wire and a signal line are combined into a conductor 6, and the upper part 2 of the electromagnetic flowmeter, the transmitter 3, the lower part 4 of the electromagnetic flowmeter, and the processor 5 are connected in series in sequence using the conductor 6. Then, they are placed into an O-ring mold together with the thermoplastic vulcanized rubber pellets prepared in Example 3 and molded (the molding temperature is 152.5°C and the pressure is 19 MPa) for 4.5 minutes. After cooling and molding, the mold is removed and the edges are trimmed to obtain a functional rubber sealing ring for HDPE corrugated pipe flow monitoring.

[0051] Comparative Example 1

[0052] Compared with Example 5, this comparative example is different in that the "thermoplastic vulcanized rubber pellets prepared in Example 1" are replaced with "natural rubber", and the other steps and parameters are the same.

[0053] Comparative Example 2

[0054] Compared with Example 5, this comparative example omits "a steel wire", that is, the upper part 2 of the electromagnetic flowmeter, the transmitter 3, the lower part 4 of the electromagnetic flowmeter, and the processor 5 are only connected in series with a signal line, and other steps and parameters are the same.

[0055] The following performance tests were performed on the rubber sealing rings prepared in Examples 5-7 and the rubber sealing rings prepared in Comparative Examples 1-2:

[0056] 1. Hardness test according to GB / T 5720-2008;

[0057] 2. According to GB / T 1684-1985, a short-time static compression test of vulcanized rubber is carried out to measure the pressure per unit area of ​​the sample when the specified compression deformation is reached (N / m 2 );

[0058] The test results are shown in Table 1.

[0059] Table 1

[0060] Test items Hardness / Shore <![CDATA[Pressure per unit area of the specimen / (N / m 2 )]]> Example 5 85 <![CDATA[2.50×10 7 ]]> Example 6 90 <![CDATA[2.49×10 7 ]]> Example 7 88 <![CDATA[2.52×10 7 ]]> Comparative Example 1 70 <![CDATA[1.60×10 7 ]]> Comparative Example 2 84 <![CDATA[0.60×10 7 ]]>

[0061] It can be seen from Table 1 that the rubber sealing rings prepared in Examples 5-7 have stronger ability to resist abnormal deformation than the rubber sealing rings prepared in Comparative Examples 1-2.

[0062] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0063] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A functional rubber sealing ring for HDPE corrugated pipe flow monitoring, characterized in that: The invention comprises a rubber ring (1), an upper part of an electromagnetic flowmeter (2), a transmitter (3), a lower part of an electromagnetic flowmeter (4), a processor (5), and a wire (6). The material of the rubber ring (1) is thermoplastic vulcanized rubber granules. The upper part of the electromagnetic flowmeter (2), the transmitter (3), the lower part of the electromagnetic flowmeter (4), and the processor (5) are sequentially connected in series through the wire (6) and pre-buried in the rubber ring (1). The wire (6) is composed of a steel wire and a signal line. The thermoplastic vulcanized rubber granules include the following raw materials in parts by weight: 70-80 parts of natural rubber, 30-34 parts of polypropylene granules, 0.15-0.17 parts of antioxidant 1010, 0.7-0.8 parts of methylhexahydrophthalic anhydride, 0.35-0.4 parts of trimethylolpropane trimethacrylate, and 0.1-0.12 parts of initiator.

2. The functional rubber sealing ring for HDPE corrugated pipe flow monitoring according to claim 1, characterized in that: The initiator is any one of ammonium persulfate and potassium persulfate.

3. The functional rubber sealing ring for HDPE corrugated pipe flow monitoring according to claim 1, characterized in that: The thermoplastic vulcanized rubber granules are prepared by the following steps: Step 1: Weigh the raw materials according to the formula, add natural rubber, polypropylene pellets and antioxidant 1010 into an internal mixer and mix them, then cool to 23±2°C to obtain a rubber-plastic blend; Step 2: After the rubber-plastic blend is conveyed to an open mill for roll wrapping, methyl hexahydrophthalic anhydride, trimethylolpropane trimethacrylate and an initiator are added, and triangular wrapping is performed 11-13 times. The mixture is cut into strips, conveyed to a twin-screw extruder for dynamic vulcanization, and then conveyed to a granulator for shear granulation to obtain thermoplastic vulcanized rubber pellets.

4. The functional rubber sealing ring for HDPE corrugated pipe flow monitoring according to claim 3, characterized in that: The rotor speed of the internal mixer is 300-350 rpm, the mixing temperature is 150-155° C., and the mixing time is 10-13 minutes.

5. The functional rubber sealing ring for HDPE corrugated pipe flow monitoring according to claim 3, characterized in that: The roller temperature of the open mill is 23±2° C., the temperature of the twin-screw extruder is 150-155° C., and the rotation speed is 400-500 r / min.

6. The functional rubber sealing ring for HDPE corrugated pipe flow monitoring according to claim 1, characterized in that: The method comprises the following steps: A steel wire and a signal line are combined into a conductor (6), and the upper part (2) of the electromagnetic flowmeter, the transmitter (3), the lower part (4) of the electromagnetic flowmeter, and the processor (5) are sequentially connected in series with the conductor (6). The conductor (6) is then placed into an O-ring mold together with thermoplastic vulcanized rubber granules for molding, cooling and forming, and then the mold is removed and the edges are trimmed to obtain a functional rubber sealing ring for HDPE corrugated pipe flow monitoring.

7. The functional rubber sealing ring for HDPE corrugated pipe flow monitoring according to claim 6, characterized in that: The molding temperature is 150-155° C., the pressure is 18-20 MPa, and the time is 4-5 minutes.

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