Preparation method of inner shielding layer of 10kV variable intermediate joint

Abstract

The invention provides a preparation method of a 10kV variable intermediate joint inner shielding layer, and belongs to the technical field of electric power. The problems that an existing inner shielding layer is hard in material and prone to being broken or fractured when subjected to external force, so that the service life is short, and an internal cable cannot be effectively protected are solved. The preparation method of the inner shielding layer of the 10kV variable intermediate joint comprises the following steps: step 1, weighing 100 parts by mass of raw rubber, 30 parts by mass of white carbon black, 3 parts by mass of hydroxyl silicone oil, 0.3 part by mass of zinc stearate and 5 parts by mass of acetylene carbon black; 2, starting the closed rubber mixing machine, feeding the raw rubber into the closed rubber mixing machine, and starting primary closed rubber mixing, wherein the rubber mixing time is 9-12 minutes; through cooperation of the materials and the steps, the produced inner shielding layer of the intermediate joint has good physical properties such as retraction permanent deformation, tear resistance and stretching resistance and also has good insulativity, and the length of the inner shielding layer can be adjusted according to the length of the customized intermediate joint.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power, and in particular relates to a method for preparing an inner shielding layer of a 10kV variable intermediate joint. Background Art

[0002] Electricity is an energy source that uses electrical energy as a driving force. It is an electricity production and consumption system consisting of power generation, transmission, transformation, distribution and consumption. It converts the primary energy in nature into electricity through mechanical energy devices, and then supplies electricity to various users through transmission, transformation and distribution.

[0003] In order to protect the joints of cables in the power system, an intermediate joint needs to be installed at the connection of two cables. The inner shielding layer is an important component of the intermediate joint. The existing inner shielding layer is made of a hard material and is easily broken or cracked when subjected to external force, resulting in a short service life and failure to effectively protect the internal cables. Therefore, in order to solve this problem, we proposed a method for preparing the inner shielding layer of a 10kV variable intermediate joint. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing an inner shielding layer of a 10kV variable intermediate joint in view of the above problems existing in the prior art.

[0005] The object of the present invention can be achieved by the following technical scheme: A method for preparing an inner shielding layer of a 10kV variable intermediate joint, characterized in that it comprises the following steps: Step 1: Weigh 100 parts by mass of raw rubber, 30 parts by mass of white carbon black, 3 parts by mass of hydroxy silicone oil, 0.3 parts by mass of zinc stearate and 5 parts by mass of acetylene black.

[0006] Step 2: Open the closed rubber mixing machine and put the raw rubber into it to start the first closed rubber mixing. The mixing time is 9-12 minutes.

[0007] Step 3: After the initial mixing time is reached, open the closed rubber mixer, add white carbon black, hydroxy silicone oil, zinc stearate and acetylene black one by one, and mix the rubber again in a closed mixer for 15-20 minutes.

[0008] Step 4: After the secondary mixing time is reached, turn on the rubber discharge and sheet unloading function of the closed rubber mixer, and place the rubber sheets to cool to room temperature.

[0009] Step 5: The cooled film enters the rubber cutting machine for cutting. The cutting length and width are adjusted according to the required length and diameter of the middle joint.

[0010] Step 6: Open the molding mold and put the cut rubber strips into the molding mold, close the molding mold for high temperature and pressure deformation treatment, turn off the high temperature and pressure functions of the molding mold after the time is up, naturally cool to 50-60℃, and demold the molding mold to obtain the finished rubber semicircular tube.

[0011] The preparation method of the inner shielding layer of the 10kV variable intermediate joint, through the combination of the above materials and steps, produces an inner shielding layer of the intermediate joint, which has good physical properties such as permanent shrinkage deformation, tearing resistance and stretching resistance, and has good insulation. The length of the inner shielding layer can be adjusted according to the customized length of the intermediate joint.

[0012] In the above-mentioned method for preparing the inner shielding layer of the 10kV variable intermediate joint, the raw rubber in step 1 is methyl vinyl raw rubber, and the rubber mixing temperature in steps 2 and 3 is both 135-145°C.

[0013] In the above-mentioned method for preparing the inner shielding layer of the 10kV variable intermediate joint, the cutting speed of the rubber cutting machine in step 5 is 3-5m / min, and the knives used by the rubber cutting machine include steel knives and ceramic knives.

[0014] In the above-mentioned method for preparing the inner shielding layer of the 10kV variable intermediate joint, the length and width of the film cut in step five are both greater than the length and diameter of the intermediate joint, and the sides and ends of the film are cut off by the shaping knife installed on the rubber cutting machine during the cutting process.

[0015] In the above-mentioned method for preparing the inner shielding layer of the 10kV variable intermediate joint, the heating temperature in step six is ​​90-120°C, the pressure is 4-6MPa, and the duration is 5-8min. After the molding mold is closed in step six, the part of the rubber strip that overflows the mold is cut.

[0016] In the above-mentioned method for preparing the inner shielding layer of the 10kV variable intermediate joint, in the step 2, before the raw rubber is put into the closed rubber mixing mill, the heating function is turned on in advance for preheating.

[0017] Compared with the prior art, the present invention produces an inner shielding layer of the intermediate joint through the combination of the above materials and steps, which has good physical properties such as shrinkage permanent deformation, tear resistance and stretching resistance, and also has good insulation. The length of the inner shielding layer can be adjusted according to the customized length of the intermediate joint. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention, which further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0019] A method for preparing an inner shielding layer of a 10kV variable intermediate joint comprises the following steps: Step 1: Weigh 100 parts by mass of raw rubber, 30 parts by mass of white carbon black, 3 parts by mass of hydroxy silicone oil, 0.3 parts by mass of zinc stearate and 5 parts by mass of acetylene black.

[0020] Step 2: Open the closed rubber mixing machine and put the raw rubber into it to start the first closed rubber mixing. The mixing time is 9-12 minutes.

[0021] Step 3: After the initial mixing time is reached, open the closed rubber mixer, add white carbon black, hydroxy silicone oil, zinc stearate and acetylene black one by one, and mix the rubber again in a closed mixer for 15-20 minutes.

[0022] Step 4: After the secondary mixing time is reached, turn on the rubber discharge and sheet unloading function of the closed rubber mixer, and place the rubber sheets to cool to room temperature.

[0023] Step 5: The cooled film enters the rubber cutting machine for cutting. The cutting length and width are adjusted according to the required length and diameter of the middle joint.

[0024] Step 6: Open the molding mold and put the cut rubber strips into the molding mold, close the molding mold for high temperature and pressure deformation treatment, turn off the high temperature and pressure functions of the molding mold after the time is up, naturally cool to 50-60℃, and demold the molding mold to obtain the finished rubber semicircular tube.

[0025] In actual manufacturing, the raw rubber in step 1 is methyl vinyl raw rubber, and the mixing temperature in steps 2 and 3 is 135-145°C.

[0026] In actual manufacturing, the cutting speed of the rubber cutting machine in step 5 is 3-5 m / min, and the cutting tools used by the rubber cutting machine include steel knives and ceramic knives.

[0027] In actual manufacturing, the length and width of the film cut in step 5 are both greater than the length and diameter of the middle joint, and the sides and ends of the film are cut off by the shaping knife installed on the rubber cutting machine during the cutting process.

[0028] In actual manufacturing, in step six, the heating temperature is 90-120° C., the pressure is 4-6 MPa, and the duration is 5-8 minutes. After the molding mold is closed in step six, the portion of the rubber strip that overflows the mold is cut off.

[0029] In actual manufacturing, before the raw rubber is put into the closed rubber mixer in step 2, the heating function is turned on in advance for preheating.

[0030] Implementation column 1: A method for preparing an inner shielding layer of a 10kV variable intermediate joint comprises the following steps: Step 1: Weigh 100 parts by mass of raw rubber, 30 parts by mass of white carbon black, 3 parts by mass of hydroxy silicone oil, 0.3 parts by mass of zinc stearate and 5 parts by mass of acetylene black.

[0031] Step 2: Open the closed rubber mixing machine and put the raw rubber into it to start the first closed rubber mixing. The mixing time is 9-12 minutes.

[0032] Step 3: After the initial mixing time is reached, open the closed rubber mixer, add white carbon black, hydroxy silicone oil, zinc stearate and acetylene black one by one, and mix the rubber again in a closed mixer for 20 minutes.

[0033] Step 4: After the secondary mixing time is reached, turn on the rubber discharge and sheet unloading function of the closed rubber mixer, and place the rubber sheets to cool to room temperature.

[0034] Step 5: The cooled film enters the rubber cutting machine for cutting. The cutting length and width are adjusted according to the required length and diameter of the middle joint.

[0035] Step 6: Open the molding mold and put the cut rubber strips into the molding mold, close the molding mold for high temperature and pressure deformation treatment, turn off the high temperature and pressure functions of the molding mold after the time is up, naturally cool to 50°C, and demold the molding mold to obtain the finished rubber semicircular tube.

[0036] In actual manufacturing, the raw rubber in step 1 is methyl vinyl raw rubber, and the mixing temperature in steps 2 and 3 is 135°C.

[0037] In actual manufacturing, the cutting speed of the rubber cutting machine in step 5 is 3 m / min, and the cutting tools used by the rubber cutting machine include steel knives and ceramic knives.

[0038] In actual manufacturing, the length and width of the film cut in step 5 are both greater than the length and diameter of the middle joint, and the sides and ends of the film are cut off by the shaping knife installed on the rubber cutting machine during the cutting process.

[0039] In actual manufacturing, in step six, the heating temperature is 120° C., the pressure is 4 MPa, and the duration is 5 minutes. After the molding mold is closed in step six, the portion of the rubber strip that overflows the mold is cut off.

[0040] In actual manufacturing, before the raw rubber is put into the closed rubber mixer in step 2, the heating function is turned on in advance for preheating.

[0041] Implementation column 2: A method for preparing an inner shielding layer of a 10kV variable intermediate joint comprises the following steps: Step 1: Weigh 100 parts by mass of raw rubber, 30 parts by mass of white carbon black, 3 parts by mass of hydroxy silicone oil, 0.3 parts by mass of zinc stearate and 5 parts by mass of acetylene black.

[0042] Step 2: Open the closed rubber mixing machine and put the raw rubber into it to start the first closed rubber mixing. The mixing time is 9-12 minutes.

[0043] Step 3: After the initial mixing time is reached, open the closed rubber mixer, add white carbon black, hydroxy silicone oil, zinc stearate and acetylene black one by one, and mix the rubber again in a closed manner. The mixing time is 17 minutes.

[0044] Step 4: After the secondary mixing time is reached, turn on the rubber discharge and sheet unloading function of the closed rubber mixer, and place the rubber sheets to cool to room temperature.

[0045] Step 5: The cooled film enters the rubber cutting machine for cutting. The cutting length and width are adjusted according to the required length and diameter of the middle joint.

[0046] Step 6: Open the molding mold and put the cut rubber strips into the molding mold, close the molding mold for high temperature and pressure deformation treatment, turn off the high temperature and pressure functions of the molding mold after the time is up, naturally cool to 55°C, and demold the molding mold to obtain the finished rubber semicircular tube.

[0047] In actual manufacturing, the raw rubber in step 1 is methyl vinyl raw rubber, and the mixing temperature in steps 2 and 3 is 140°C.

[0048] In actual manufacturing, the cutting speed of the rubber cutting machine in step 5 is 4 m / min, and the cutting tools used by the rubber cutting machine include steel knives and ceramic knives.

[0049] In actual manufacturing, the length and width of the film cut in step 5 are both greater than the length and diameter of the middle joint, and the sides and ends of the film are cut off by the shaping knife installed on the rubber cutting machine during the cutting process.

[0050] In actual manufacturing, in step six, the heating temperature is 105° C., the pressure is 5 MPa, and the duration is 7 minutes. After the molding mold is closed in step six, the portion of the rubber strip that overflows the mold is cut off.

[0051] In actual manufacturing, before the raw rubber is put into the closed rubber mixer in step 2, the heating function is turned on in advance for preheating.

[0052] Implementation column three: A method for preparing an inner shielding layer of a 10kV variable intermediate joint comprises the following steps: Step 1: Weigh 100 parts by mass of raw rubber, 30 parts by mass of white carbon black, 3 parts by mass of hydroxy silicone oil, 0.3 parts by mass of zinc stearate and 5 parts by mass of acetylene black.

[0053] Step 2: Open the closed rubber mixing machine and put the raw rubber into it to start the first closed rubber mixing. The mixing time is 9-12 minutes.

[0054] Step 3: After the initial mixing time is reached, open the closed rubber mixer, add white carbon black, hydroxy silicone oil, zinc stearate and acetylene black one by one, and mix the rubber again in a closed manner for 15 minutes.

[0055] Step 4: After the secondary mixing time is reached, turn on the rubber discharge and sheet unloading function of the closed rubber mixer, and place the rubber sheets to cool to room temperature.

[0056] Step 5: The cooled film enters the rubber cutting machine for cutting. The cutting length and width are adjusted according to the required length and diameter of the middle joint.

[0057] Step 6: Open the molding mold and put the cut rubber strips into the molding mold, close the molding mold for high temperature and pressure deformation treatment, turn off the high temperature and pressure functions of the molding mold after the time is up, naturally cool to 60°C, and demold the molding mold to obtain the finished rubber semicircular tube.

[0058] In actual manufacturing, the raw rubber in step 1 is methyl vinyl raw rubber, and the mixing temperature in steps 2 and 3 is 145°C.

[0059] In actual manufacturing, the cutting speed of the rubber cutting machine in step 5 is 5 m / min, and the cutting tools used by the rubber cutting machine include steel knives and ceramic knives.

[0060] In actual manufacturing, the length and width of the film cut in step 5 are both greater than the length and diameter of the middle joint, and the sides and ends of the film are cut off by the shaping knife installed on the rubber cutting machine during the cutting process.

[0061] In actual manufacturing, in step six, the heating temperature is 90° C., the pressure is 6 MPa, and the duration is 8 minutes. After the molding mold is closed in step six, the portion of the rubber strip that overflows the mold is cut off.

[0062] In actual manufacturing, before the raw rubber is put into the closed rubber mixer in step 2, the heating function is turned on in advance for preheating.

[0063] The present invention, through the coordination of the above-mentioned material steps, produces an inner shielding layer of the intermediate joint, which has good physical properties such as shrinkage permanent deformation, tearing resistance and stretching resistance, and also has good insulation. The length of the inner shielding layer can be adjusted according to the customized length of the intermediate joint.

[0064] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in the field. The specific embodiments described herein are merely examples of the spirit of the present invention. The technical personnel in the technical field to which the present invention belongs can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but they will not deviate from the spirit of the present invention or exceed the scope defined by the attached claims.

Claims

1. A method for preparing the inner shielding layer of a 10kV variable intermediate joint, characterized in that The steps include: Step 1: Weigh 100 parts by mass of raw rubber, 30 parts by mass of white carbon black, 3 parts by mass of hydroxy silicone oil, 0.3 parts by mass of zinc stearate and 5 parts by mass of acetylene black; Step 2: Open the closed rubber mixing machine and put the raw rubber into it to start the first closed rubber mixing. The mixing time is 9-12 minutes; Step 3: After the initial mixing time is reached, open the closed rubber mixer, add white carbon black, hydroxy silicone oil, zinc stearate and acetylene carbon black one by one, and mix the rubber again in a closed mixer for 15-20 minutes; Step 4: After the secondary mixing time is reached, the rubber discharging and sheeting function of the closed rubber mixer is turned on, and the rubber sheets are placed to cool to room temperature; Step 5: The cooled rubber sheet enters the rubber cutting machine for cutting. The cutting length and width are adjusted according to the required length and diameter of the middle joint. Step 6: Open the molding mold and put the cut rubber strips into the molding mold, close the molding mold for high temperature and pressure deformation treatment, turn off the high temperature and pressure functions of the molding mold after the time is up, naturally cool to 50-60℃, and demold the molding mold to obtain the finished rubber semicircular tube.

2. The method for preparing the inner shielding layer of the 10kV variable intermediate joint according to claim 1, characterized in that: The raw rubber in step 1 is methyl vinyl raw rubber, and the rubber mixing temperature in steps 2 and 3 is 135-145°C.

3. The method for preparing the inner shielding layer of the 10kV variable intermediate joint according to claim 1, characterized in that: The cutting speed of the rubber cutting machine in step 5 is 3-5 m / min, and the cutting tools used by the rubber cutting machine include steel knives and ceramic knives.

4. The method for preparing the inner shielding layer of the 10kV variable intermediate joint according to claim 1, characterized in that: The length and width of the film cut in step 5 are both greater than the length and diameter of the middle joint, and the sides and ends of the film are cut off by a shaping knife installed on the rubber cutting machine during the cutting process.

5. The method for preparing the inner shielding layer of the 10kV variable intermediate joint according to claim 1, characterized in that: In the step six, the heating temperature is 90-120° C., the pressure is 4-6 MPa, and the duration is 5-8 min. After the molding mold is closed in the step six, the portion of the rubber strip that overflows the mold is cut.

6. The method for preparing the inner shielding layer of the 10kV variable intermediate joint according to claim 1, characterized in that: In the step 2, before the raw rubber is put into the closed rubber mixer, the heating function is turned on in advance for preheating.