Anti-freezing testing device for cable protection pipe

Abstract

The utility model discloses an anti-freezing testing device for a cable protection pipe, and relates to the technical field related to power cables. The device comprises a test box, a sealing cover, a movable plate, a cable protection tube main body, a long rod and an impact hammer, an impact test tube is fixed at the center of the top of the test box in a penetrating manner, and the impact hammer is arranged in the impact test tube; a temperature sensor is fixed at the top of the test box beside the impact test tube, and a cold air pipe penetrates through the side surface of the test box; sealing covers are hermetically fixed at two ends of the test box; two movable plates are movably inserted into the test box, and a cable protection pipe body is arranged in the two movable plates in a penetrating mode. Through the arrangement of the test box, the movable plate, the sealing cover, the long rod, the impact test tube and the impact hammer, the problems that anti-freezing test is lacked for cable protection tubes in special regions, and the existing anti-freezing test cannot be combined with the anti-freezing test, the functionality is insufficient, and the performance of the test device is not comprehensive enough are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of power cables, and in particular relates to an antifreeze testing device for cable protection pipes. Background Technology

[0002] Cable protection pipes are conduit systems used to protect power and communication cables from mechanical damage, chemical corrosion, and external interference. Common types include: fiberglass cable protection pipes, PVC-C / CPVC cable protection pipes, MPP cable protection pipes, HDPE cable protection pipes, and stainless steel cable protection pipes. Among these, MPP cable protection pipes are currently the most widely used. Before cable protection pipes are put on the market, certain tests are required, such as impact resistance tests and freeze protection tests. However, the following drawbacks still exist in actual testing operations:

[0003] For certain regions with special characteristics, such as colder regions, the freeze resistance of cable protection pipes is particularly important. They need to have sufficient freeze resistance to protect the internal cables from damage. However, there is currently a lack of corresponding freeze resistance testing equipment on the market, and the effectiveness of freeze resistance testing cannot be effectively demonstrated.

[0004] Secondly, after the freeze resistance test, an impact resistance test should be conducted to obtain a more complete testing procedure. However, the current impact resistance test cannot be combined with the freeze resistance test, resulting in insufficient functionality and incomplete testing performance. Utility Model Content

[0005] The purpose of this utility model is to provide a freeze protection test device for cable protection pipes. By setting up a test box, movable plate, cover, long rod, impact test pipe, and impact hammer, it solves the problems of lack of freeze protection test for cable protection pipes in special areas, and the inability of current impact test to be combined with freeze protection test, resulting in insufficient functionality and incomplete performance of the test device.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to an antifreeze testing device for cable protection pipes, comprising a test box, a cover, a movable plate, a cable protection pipe body, a long rod, and an impact hammer. An impact test pipe is fixedly inserted through the center of the top of the test box, and an impact hammer is installed inside the impact test pipe. A temperature sensor is fixedly installed on the top of the test box next to the impact test pipe, and the probe of the temperature sensor extends into the test box. A cooling pipe is fixedly inserted through the side of the test box. The two ends of the test box are sealed and fixed with a cover.

[0008] The test box contains two movable plates, and a cable protection pipe body is installed through both movable plates.

[0009] Furthermore, both ends of the cable protection pipe body are sealed with end caps, and a pipe is fixed through the end cap. A rubber plug is inserted into the port of the pipe away from the end cap.

[0010] Furthermore, symmetrical limiting grooves are provided on both inner walls of the test chamber, and symmetrical limiting blocks are fixed on both sides of the two movable plates, with the limiting blocks slidably disposed within the limiting grooves.

[0011] Furthermore, the movable plate above the main body of the cable protection pipe is symmetrically provided with adjustment grooves, and a long rod is inserted into the two adjustment grooves on the same straight line in the two movable plates, and the lower part of the long rod is fixed with equally distributed ribbons.

[0012] Furthermore, a slot is provided through the impact test tube; during the freezing test, a plate is inserted into the slot and the impact hammer is pulled out of the impact test tube; during the impact resistance test, the plate is pulled out of the slot and the impact hammer enters the impact test tube.

[0013] Furthermore, ear plates are fixed on both sides of both ends of the test box, and a plug is fixed on the side of the cover facing the test box, with the plug extending into the test box. A sealing gasket is provided outside the plug, and the sealing gasket contacts the end of the test box. Ear plates are fixed on both sides of the cover, and bolts are inserted between adjacent ear plates and ear plates, and nuts are screwed in to fix them.

[0014] Furthermore, a connecting rod is fixed to the top of the impact hammer, a sliding block is fixed to the upper end of the connecting rod, a handle is fixed to the upper end of the sliding block, and the upper end of the handle extends out of the impact test tube. The sliding block is located inside the impact test tube, and the impact hammer contacts the top of the main body of the cable protection tube.

[0015] This utility model has the following beneficial effects:

[0016] This invention solves the problem of lacking antifreeze testing for cable protection pipes in special areas by setting up a test box, movable plates, a cover, and long rods. Before conducting the antifreeze test, two movable plates are inserted through both ends of the cable protection pipe body and fixed and sealed with adhesive. Then, two long rods are inserted between the two movable plates. Finally, the two movable plates are movably locked into the test box, and both ends of the cable protection pipe body are sealed with end caps. Finally, the end caps at both ends of the test box are closed. During the test, a cold air pipe is connected to a refrigeration device, and cold air is introduced into the test box. After a certain period of time, the cold air is stopped and allowed to thaw. Then, the cold air is introduced again, and this process is repeated several times, with the specific number of times depending on the actual testing requirements. After the antifreeze test, to check the antifreeze effect, the cover is opened, and the long rods are brought close together. At this time, the ribbon falls onto the cable protection pipe body. Then, the rubber plug on the pipe inside the end cap is opened, and air is blown into the cable protection pipe body. If the ribbon is disturbed, it proves that a crack exists; otherwise, it proves that the antifreeze test of the cable protection pipe body is qualified.

[0017] This invention solves the problem that current impact resistance testing cannot be combined with freeze resistance testing, resulting in insufficient functionality and incomplete testing performance. By setting up a test box, impact test tube, and impact hammer, the current invention addresses the issue that impact resistance testing cannot be combined with freeze resistance testing, resulting in insufficient functionality and incomplete testing performance. After the freeze resistance test is completed, the plug is pulled out, and the impact hammer is held by the handle to a certain height. After releasing the handle, the impact hammer falls along the impact test tube until it hits the surface of the cable protection pipe body. This process is repeated several times. Finally, air is blown into the cable protection pipe body to observe whether the ribbon flutters, to check for cracks, and to observe the impact resistance test effect. If it passes the test, it can be sold and used. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 A three-dimensional view of a cable protection pipe antifreeze testing device during an antifreeze test;

[0020] Figure 2 A three-dimensional view of an antifreeze testing device for cable protection pipe during an impact resistance test;

[0021] Figure 3 This is a cross-sectional view of the test chamber during the freeze-thaw test;

[0022] Figure 4 This is a cross-sectional view of the test chamber during an impact test.

[0023] Figure 5 This diagram shows the connection between the main body of the cable protection pipe and the movable plate and long rod.

[0024] Figure 6 This is a connection diagram of the cable protection pipe body and the movable plate;

[0025] Figure 7 This is a structural diagram of a long rod;

[0026] Figure 8 This is a structural diagram of the cap.

[0027] Figure label:

[0028] 1. Test box; 101. Impact test tube; 1011. Slot; 102. Insert plate; 103. Temperature sensor; 104. Cooling pipe; 105. Limiting groove; 106. Ear plate one; 2. Cover; 201. Plug; 202. Sealing gasket; 203. Ear plate two; 3. Movable plate; 301. Adjustment groove; 302. Limiting block; 4. Cable protection pipe body; 401. End cap; 402. Pipe; 403. Rubber plug; 5. Long rod; 501. Streamer; 6. Impact hammer; 601. Sliding block; 602. Connecting rod; 603. Handle. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0030] Please see Figure 1-8 As shown, this utility model is a frost protection testing device for cable protection pipes, including a test box 1, a cover 2, a movable plate 3, a cable protection pipe body 4, a long rod 5, and an impact hammer 6. An impact test tube 101 is fixed through the center of the top of the test box 1, and an impact hammer 6 is installed inside the impact test tube 101. A temperature sensor 103 is fixed to the top of the test box 1 next to the impact test tube 101, and the probe of the temperature sensor 103 extends into the test box 1. A cooling pipe 104 is fixed through the side of the test box 1. The two ends of the test box 1 are sealed and fixed with the cover 2.

[0031] The test chamber 1 serves as the main testing area and is made of a relatively thick transparent material (including but not limited to a thick acrylic sheet) to facilitate observation of the test results. Temperature changes within the test chamber 1 are observed through a temperature sensor 103. The temperature sensor 103 is a digital display type and is a common electrical appliance on the market; therefore, it will not be described in detail or have specific model limitations. For the freeze resistance test, an external refrigeration device can be connected to input cold air into the test chamber 1. For the heat resistance test, the cold air pipe 104 can be connected to a heat-generating device to input heat into the test chamber 1. The impact hammer 6 inside the impact test tube 101 undergoes a free fall from a certain height for impact resistance testing. For the freeze resistance test, both ends of the test chamber 1 need to be sealed with a cover 2.

[0032] The test box 1 has two movable plates 3 that are movably connected inside, and the cable protection pipe body 4 is installed through both movable plates 3.

[0033] The movable plate 3 is used to connect the cable protection pipe body 4 to keep it in a stable position.

[0034] Both ends of the cable protection pipe body 4 are sealed with adhesive and fixed with end caps 401. A pipe 402 is fixed through the end cap 401. A rubber plug 403 is inserted into the port of the pipe 402 away from the end cap 401.

[0035] After the cable protection pipe body 4 and the movable plate 3 are installed, end caps 401 are installed at both ends, and pipes 402 are installed inside the end caps 401. Before the antifreeze test, the pipes 402 are sealed with rubber plugs 403. When testing the antifreeze effect, the rubber plugs 403 are pulled out and air is injected.

[0036] Symmetrical limiting grooves 105 are provided on both inner walls of the test chamber 1, and symmetrical limiting blocks 302 are fixed on both sides of the two movable plates 3, and the limiting blocks 302 are slidably disposed in the limiting grooves 105.

[0037] When installing the movable plate 3, insert the limiting block 302 on its side into the limiting groove 105 and then push it into the test box 1 to keep the position of the movable plate 3 stable and prevent it from shifting to the left or right.

[0038] The movable plate 3 above the cable protection pipe body 4 is symmetrically provided with adjustment grooves 301. The two adjustment grooves 301 on the same straight line in the two movable plates 3 are interspersed with long rods 5, and the lower part of the long rods 5 is fixed with equally distributed ribbons 501.

[0039] After the cable protection pipe body 4 and the movable plate 3 are installed, the long rod 5 needs to be inserted between the two movable plates 3. When the long rod 5 approaches each other in the adjustment groove 301, most of the ribbon 501 is on the outer surface of the cable protection pipe body 4.

[0040] The impact test tube 101 has a slot 1011 extending through it; during the freezing test, a plate 102 is inserted into the slot 1011 and the impact hammer 6 is pulled out of the impact test tube 101; during the impact resistance test, the plate 102 is pulled out of the slot 1011 and the impact hammer 6 enters the impact test tube 101.

[0041] During the freeze test, the insert plate 102 is inserted into the slot 1011 to block the impact test tube 101. When the impact test is required, the insert plate 102 is pulled out of the slot 1011 and the impact hammer 6 is slid into the impact test tube 101 for free fall to conduct the impact test.

[0042] Ear plates 106 are fixed on both sides of both ends of the test chamber 1. A plug 201 is fixed on the side of the cover 2 facing the test chamber 1 and extends into the test chamber 1. A sealing gasket 202 is provided on the outside of the plug 201 and contacts the end of the test chamber 1. Ear plates 203 are fixed on both sides of the cover 2. Bolts are inserted between the adjacent ear plates 106 and ear plates 203 and nuts are screwed in to fix them.

[0043] When installing the cover 2, insert the plug 201 on the inside of the cover 2 into the port of the test chamber 1, and then fit the sealing gasket 202 against the port of the test chamber 1. Then tighten the bolts and nuts between the adjacent ear plates 106 and 203.

[0044] A connecting rod 602 is fixed to the top of the impact hammer 6. A sliding block 601 is fixed to the upper end of the connecting rod 602. A handle 603 is fixed to the upper end of the sliding block 601. The upper end of the handle 603 extends out of the impact test tube 101. The sliding block 601 is located inside the impact test tube 101. The impact hammer 6 contacts the top of the cable protection tube body 4.

[0045] The sliding block 601 is lifted by the handle 603. The sliding block 601 is connected to the impact hammer 6 through the connecting rod 602 and is lifted synchronously. After being lifted to a certain height, it is allowed to fall freely to generate an impact force to impact the cable protection pipe body 4, thereby achieving an impact resistance test. The limit setting of the sliding block 601 ensures that the impact hammer 6 will not deviate after falling into the test box 1 and will remain centered.

[0046] The specific working principle of this utility model is as follows: First, the test chamber 1, which serves as the main testing environment, is made of a relatively thick transparent material; the temperature change inside the test chamber 1 is observed through the temperature sensor 103.

[0047] Before conducting the freeze resistance test, two movable plates 3 are inserted through both ends of the cable protection pipe body 4 and sealed with adhesive. The insert plate 102 is then inserted into the slot 1011 to seal the impact test tube 101. After the cable protection pipe body 4 and movable plates 3 are installed, end caps 401 are installed at both ends, and pipes 402 are installed inside the end caps 401. Before the freeze resistance test, the pipes 402 are sealed with rubber plugs 403. After installing the cable protection pipe body 4 and movable plates 3, a long rod 5 is inserted between the two movable plates 3. Then, the movable plates 3 are installed, and the limiting blocks 302 on their sides are inserted into the limiting grooves 105 before being pushed into the test tube. Inside test chamber 1, keep the movable plate 3 in a stable position. Finally, close the covers 2 at both ends of test chamber 1, insert the plugs 201 inside the covers 2 into the ports of test chamber 1, and then fit the sealing gaskets 202 against the ports of test chamber 1. Then, tighten the bolts and nuts between the adjacent ear plates 106 and 203. Connect the cold air pipe 104 to the refrigeration equipment and input cold air into test chamber 1. After inputting for a certain period of time, stop and wait for defrosting. Then input again, repeating this process several times. The specific number of times depends on the actual testing requirements (during this process, an insulation structure can be added to the outside of the test chamber to reduce the loss of cold air).

[0048] After the freeze-thaw test, to check the freeze-thaw effect, open the cover 2 and bring the long rods 5 close to each other. At this time, the ribbon 501 falls on the cable protection pipe body 4. Then open the rubber plug 403 on the pipe 402 inside the cover 401 and blow air into the cable protection pipe body 4. If the ribbon 501 is disturbed, it proves that there is a crack. Otherwise, it proves that the freeze-thaw test of the cable protection pipe body 4 is qualified.

[0049] After the freeze resistance test is completed, move the long rods 5 apart. Then, pull the insert plate 102 out of the slot 1011 and lift the sliding block 601 through the handle 603. The sliding block 601 is connected to the impact hammer 6 through the connecting rod 602 and lifted synchronously. After being lifted to a certain height, it is allowed to fall freely to generate impact force to impact the cable protection pipe body 4, thus achieving the impact resistance test. Repeat this several times. Finally, blow air into the cable protection pipe body 4 and observe whether the ribbon 501 floats up, check for cracks, and observe the impact resistance test effect. If it passes the test, it can be sold and used.

[0050] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. A frost protection testing device for cable protection pipes, comprising a test box (1), a cover (2), a movable plate (3), a cable protection pipe body (4), a long rod (5), and an impact hammer (6), characterized in that: An impact test tube (101) is fixed through the center of the top of the test chamber (1), and an impact hammer (6) is installed inside the impact test tube (101); a temperature sensor (103) is fixed on the top of the test chamber (1) next to the impact test tube (101), and the probe of the temperature sensor (103) extends into the test chamber (1); a cold air pipe (104) is fixed through the side of the test chamber (1); and a cover (2) is fixed at both ends of the test chamber (1). The test box (1) has two movable plates (3) that are movably connected inside, and the main body of the cable protection pipe (4) is installed through both movable plates (3).

2. The antifreeze testing device for cable protection pipes according to claim 1, characterized in that: Both ends of the cable protection pipe body (4) are sealed with adhesive and fixed with end caps (401). A pipe (402) is fixed through the end cap (401), and a rubber plug (403) is inserted into the port of the pipe (402) away from the end cap (401).

3. The antifreeze testing device for cable protection pipes according to claim 1, characterized in that: The test box (1) has symmetrical limiting grooves (105) on both inner walls, and symmetrical limiting blocks (302) are fixed on both sides of the two movable plates (3), and the limiting blocks (302) are slidably set in the limiting grooves (105).

4. The antifreeze testing device for cable protection pipe according to claim 1, characterized in that: The cable protection pipe body (4) has symmetrical adjustment slots (301) in the movable plate (3) above it. The two adjustment slots (301) in the two movable plates (3) are on the same straight line and a long rod (5) is inserted in both of them. The lower part of the long rod (5) is fixed with ribbons (501) that are evenly distributed.

5. The antifreeze testing device for cable protection pipes according to claim 1, characterized in that: The impact test tube (101) has a slot (1011) through it; during the freezing test, a plate (102) is inserted into the slot (1011) and the impact hammer (6) is pulled out of the impact test tube (101); during the impact resistance test, the plate (102) is pulled out of the slot (1011) and the impact hammer (6) enters the impact test tube (101).

6. The antifreeze testing device for cable protection pipe according to claim 1, characterized in that: Ear plates (106) are fixed on both sides of the test box (1) at both ends. A plug (201) is fixed on the side of the cover (2) facing the test box (1), and the plug (201) extends into the test box (1). A sealing gasket (202) is provided outside the plug (201), and the sealing gasket (202) contacts the end of the test box (1). Ear plates (203) are fixed on both sides of the cover (2). Bolts are inserted between the ear plates (106) and ear plates (203) and nuts are screwed in to fix them.

7. The antifreeze testing device for cable protection pipe according to claim 1, characterized in that: The top of the impact hammer (6) is fixed with a connecting rod (602), the upper end of the connecting rod (602) is fixed with a sliding block (601), the upper end of the sliding block (601) is fixed with a handle (603), and the upper end of the handle (603) extends out of the impact test tube (101). The sliding block (601) is located inside the impact test tube (101), and the impact hammer (6) contacts the top of the cable protection tube body (4).

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