Air tightness detection tool for sealing cover of cable clamp screw assembly

Abstract

The utility model relates to air tightness detection of a screw assembly sealing structure, and discloses a cable clamp screw assembly sealing cover air tightness detection tool which is provided with a pressure-bearing air cylinder and a screw assembly. The pressure-bearing air cylinder is provided with an inflation cavity, and the two axial ends of the inflation cavity are provided with a testing end pressure-bearing plate and a tensioning end pressure-bearing plate. The screw assembly is installed on the pressure-bearing air cylinder in a penetrating mode through the testing end pressure-bearing plate and the tensioning end pressure-bearing plate, one end of the screw assembly is connected with the lower half cover body of the testing end sealing cover, and the other end of the screw assembly is connected with the lower half cover body of the sealing end sealing cover. During an air tightness test, the upper half cover body of the test end sealing cover and the upper half cover body of the sealing end sealing cover are connected to the corresponding lower half cover body through pipe thread structures, the pipe thread joint of the sealing end sealing cover and the joint of the lower half cover body and the tension end pressure bearing plate are connected in a sealed mode, and the inflation cavity is filled with gas with test pressure. The air tightness detection device can detect the overall air tightness of the sealing cover and the air tightness of different combination parts, and the detection accuracy is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the air tightness detection technical field of screw rod assembly sealing structure, specifically, a kind of air tightness detection tool of screw rod assembly sealing cover of suspension bridge cable clamp. BACKGROUND

[0002] In the suspension bridge structure, cable clamp is the connecting piece between main cable and bridge surface sling, which is used to transmit the load of bridge surface to main cable and clamp main cable.

[0003] The cable clamp in the prior art includes two half-ring clamps, and a main cable mounting hole for inserting the main cable is formed between the two half-ring clamps after they are butted together. After the main cable is installed in the cable clamp, the two half-ring clamps are locked and fixed by the cooperation of the screw rod and the nut. As can be seen, the stability of the screw rod and the nut is crucial to the stability of the lock clamp. However, since the cable clamp of the suspension bridge is in an outdoor environment for a long time, it is often affected by rainy and snowy weather. The screw rod that fixes the half-ring clamp is easily eroded by rainwater, and rainwater can also enter the inside of the cable clamp from the gap between the half-ring clamp and the screw rod, causing erosion to the cable clamp and the main cable, and affecting the service life of the cable clamp.

[0004] To solve the above technical problems, the prior art proposes a sealing device suitable for cable clamp screw rod, which can be seen in the Chinese patent document with the title "Sealing device for cable clamp screw rod", publication number CN111609135A and publication date September 1, 2020. In this technology, the sealing device includes a first sealing cylinder and a second sealing cylinder connected by threads. The cable clamp screw rod passes through the second sealing cylinder into the sealing cavity composed of the first sealing cylinder and the second sealing cylinder. The second sealing cylinder abuts against the installation surface of the cable clamp screw rod and is fitted with an inner spherical washer, an outer spherical washer and a nut. The first sealing cylinder surrounds the corresponding end of the cable clamp screw rod, which can effectively prevent the cable clamp screw rod and other components from being affected by the external environment. As can be seen, the joint between the second sealing cylinder and the installation surface, and the threaded joint between the second sealing cylinder and the first sealing cylinder are the most vulnerable positions to external influences. Therefore, to ensure the overall sealing performance, the air tightness detection of the joint between the second sealing cylinder and the installation surface, and the threaded joint between the second sealing cylinder and the first sealing cylinder becomes crucial.

[0005] In the prior art, no relevant tooling for air tightness detection of the joint between the second sealing cylinder and the installation surface, and the threaded joint between the second sealing cylinder and the first sealing cylinder has been reported. UTILITY MODEL CONTENTS

[0006] The utility model discloses a kind of cable clamp screw assembly sealing cover air tightness detection tool, the sealing cover has the lower half cover body of abutting at cable clamp pressure platform and wearing screw assembly, and the upper half cover body with the lower half cover body is connected with pipe thread structure and surrounds the corresponding end of screw assembly;

[0007] The utility model discloses the technical scheme as follows:

[0008] A kind of cable clamp screw assembly sealing cover air tightness detection tool, the sealing cover has the lower half cover body of abutting at cable clamp pressure platform and wearing screw assembly, and the upper half cover body with the lower half cover body is connected with pipe thread structure and surrounds the corresponding end of screw assembly;

[0009] The detection tool has pressure cylinder and screw assembly;

[0010] The inside of the pressure cylinder has inflation cavity, and the axial both ends of the inflation cavity have oppositely arranged test end pressure plate and tension end pressure plate;

[0011] The screw assembly is axially worn on the pressure cylinder through the test end pressure plate and tension end pressure plate of the pressure cylinder, one end of the screw assembly is connected with the lower half cover body of test end sealing cover outside the test end pressure plate, and the other end of the screw assembly is connected with the lower half cover body of sealing end sealing cover outside the tension end pressure plate;

[0012] In air tightness test, the upper half cover body of test end sealing cover is connected with corresponding lower half cover body with pipe thread structure, the upper half cover body of sealing end sealing cover is connected with corresponding lower half cover body with pipe thread structure, and the pipe thread combination place of sealing end sealing cover and the combination place of lower half cover body and tension end pressure plate are respectively sealedly connected, and the inflation cavity of the pressure cylinder is filled with gas of test pressure.

[0013] The above technical measures are for the particularity of screw assembly sealing protection of the cable clamp of the above-mentioned suspension bridge, and the screw assembly and two sets of sealing covers meeting actual product are assembled on the pressure cylinder that can be inflated and simulates the stress state of cable clamp locking, so that one set of sealing cover is used as sealing structure at one end of the pressure cylinder, and the other set of sealing cover is used as test structure at the other end of the pressure cylinder, the air tightness of the sealing cover as test structure is detected by filling pressure gas in the pressure cylinder, that is, the sealing performance of the sealing cover is determined according to the leakage of pressure gas from the inside of test end sealing cover, the product quality and the rationality of design structure of sealing cover are tested, so that the cable clamp screw assembly sealing cover meeting the technical requirements of suspension bridge structure is obtained.

[0014] The detection tool of the above technical measures has the technical characteristics of strong pertinence, and forms the air tightness detection of the sealing cover by the pressure gas while simulating the actual stress state, and the obtained detection result is high in accuracy.

[0015] Further, the detection tool also has a tensioning assembly;

[0016] The tensioning assembly is connected to the screw end portion at the outside of the lower half cover body of the sealing end sealing cover before the air tightness test, and pre-tensioning is performed on the screw assembly worn on the pressure cylinder.

[0017] The above technical measures are aimed at the locking technical requirements of the cable clamp screw assembly in the actual working condition environment, and the pre-tensioning force is applied to the screw assembly worn on the pressure cylinder through the tensioning assembly, so as to ensure that the screw assembly locked in place on the pressure cylinder meets the actual stress technical requirements, that is, the combined stress of the sealing cover under the locking action of the screw assembly on the pressure cylinder meets the actual design requirements, and the accuracy of the detection result is improved.

[0018] Further, the tensioning assembly has a supporting leg abutting the outside of the tensioning end pressure plate and arranged around the screw assembly, a jack abutting the outer end of the supporting leg and arranged around the screw assembly, and a pull sleeve abutting the outer end of the jack and threadedly connected to the corresponding outer end of the screw of the screw assembly in the inner hole of the jack.

[0019] The tensioning assembly of the above technical measures is designed for the axial pre-tensioning of the screw assembly on the pressure cylinder, so that the tensioning force acting on the screw assembly is formed in the axial direction, the circumferential force is balanced, and the technical requirements of the screw assembly in the actual working condition environment are met.

[0020] Further, the pressure cylinder is composed of a hollow cylinder body, a test end pressure plate and a tensioning end pressure plate fixedly connected to both ends of the cylinder body, and the test end pressure plate and the tensioning end pressure plate surround the cylinder body to form an inflation cavity.

[0021] In the above technical measures, the pressure cylinder is composed of a hollow cylinder body, a test end pressure plate and a tensioning end pressure plate fixedly connected to both ends of the cylinder body. The forming structure of the pressure cylinder can reliably bear the tensioning force of the screw assembly in accordance with the actual locking, and on the other hand, it can form a test path that can be inflated and allows the pressure gas to flow through the sealing cover and leak from the inside to the outside with a simple structure, effectively meeting the operation requirements of air tightness detection.

[0022] Further, the pressure cylinder also has an inflation mechanism, and the cylinder body of the pressure cylinder is provided with a gas hole communicating with the inflation mechanism.

[0023] The inflation mechanism has a fixed joint, an inflation pipe, a quick connector, a pressure gauge and a control valve, the fixed joint is sealingly connected to the air hole of the cylinder body, one end of the inflation pipe is connected with the quick connector, the other end is connected with the compressed air equipment, the quick connector is detachably sealingly connected with the fixed joint, the pressure gauge is connected on the inflation pipe and used for measuring the air pressure in the inflation cavity of the pressure cylinder, and the control valve is connected on the inflation pipe upstream of the pressure gauge and used for controlling the air flow into the inflation cavity of the pressure cylinder.

[0024] The above technical measures set the inflation mechanism to facilitate the inflation of the pressure cylinder; the pressure gauge for measuring the air pressure in the inflation cavity of the pressure cylinder and the control valve for controlling the air flow into the inflation cavity of the pressure cylinder are set to enable the operator to accurately control and measure the gas pressure in the inflation cavity to meet the test technical requirements, thereby improving the detection accuracy.

[0025] Further, the parallelism of the test end bearing plate and the tension end bearing plate of the pressure cylinder is ≤0.3 / total length, the outer side surface roughness of the test end bearing plate and the tension end bearing plate is ≤12.5 respectively, and the outer side surface of the test end bearing plate and the tension end bearing plate is coated with a coating structure matched with the cable clamp solid bearing platform.

[0026] The above technical measures control the parallelism, roughness and coating structure of the outer side surface of the test end bearing plate and the tension end bearing plate to ensure the matching of the test end bearing plate and the tension end bearing plate of the pressure cylinder with the cable clamp solid bearing platform, simulate the actual working environment as much as possible, and improve the detection accuracy.

[0027] Further, the coating structure of the sealing cover and the bottom structure of the lower half cover body are matched with the sealing cover used by the cable clamp solid body.

[0028] In the above technical measures, the coating structure of the sealing cover and the bottom structure of the lower half cover body are matched with the sealing cover used by the cable clamp solid body, simulate the actual working environment as much as possible, and improve the detection accuracy.

[0029] Further, the screw rod assembly is matched with the screw rod assembly used by the cable clamp solid body.

[0030] In the above technical measures, the screw rod assembly is matched with the screw rod assembly used by the cable clamp solid body, simulate the actual working environment as much as possible, and improve the detection accuracy.

[0031] A use method of the above cable clamp screw rod assembly sealing cover air tightness detection tool, the use method includes the following process steps:

[0032] Step 1. Prepare the pressure cylinder, two sets of sealing covers, one set of screw rod assembly, and one set of tension assembly;

[0033] Among the two sets of sealing covers, one set is the test end sealing cover, and the other set is the sealing end sealing cover;

[0034] Step 2. According to the installation structure of the sealing cover in the cable clamp entity, the screw rod assembly is axially installed through the test end pressure plate and the tension end pressure plate of the pressure cylinder, and the lower half cover of the test end sealing cover and the lower half cover of the sealing end sealing cover are fixed at the corresponding pressure plates of the pressure cylinder;

[0035] The tension assembly is connected to the screw rod assembly outside the tension end pressure plate;

[0036] Step 3. Pre-tension the screw rod assembly in the axial direction of the pressure cylinder through the tension assembly until the technical requirements of the pre-tension of the screw rod assembly in the cable clamp entity are met;

[0037] Lock and fix the screw rod assembly on the pressure cylinder;

[0038] Step 4. Remove the tension assembly;

[0039] The upper half cover of the test end sealing cover and the upper half cover of the sealing end sealing cover are connected to the corresponding lower half covers in a pipe thread structure;

[0040] And the joint between the lower half cover of the sealing end sealing cover and the tension end pressure plate, and the pipe thread joint between the upper half cover and the lower half cover are respectively sealed;

[0041] Step 5. Apply air-tightness check liquid at the test end sealing cover and the sealing end sealing cover respectively;

[0042] Inject pressure air into the inflation cavity through the inflation mechanism of the pressure cylinder;

[0043] Step 6. Detect the sealing performance of the sealing end sealing cover through the air-tightness check liquid at the sealing end sealing cover, and adjust the sealing structure to prevent air leakage from the sealing end sealing cover;

[0044] Step 7. Detect the sealing performance of the test end sealing cover through the air-tightness check liquid at the test end sealing cover and record it;

[0045] If there is no air leakage phenomenon at the test end sealing cover, the test end sealing cover as a whole meets the design requirements, and the test is completed;

[0046] If there is air leakage phenomenon at the test end sealing cover, proceed to Step 8;

[0047] Step 8. Detach the upper half of the test end seal cover from the lower half;

[0048] Reassemble the pipe thread connection structure of the upper half of the test end seal cover on the lower half with the seal filling structure;

[0049] Step 9. Repeat steps 5 to 7 to detect the sealing performance between the lower half of the test end seal cover and the test end pressure bearing plate by the air tightness inspection liquid and make a record;

[0050] If no air leakage occurs between the lower half of the test end seal cover and the test end pressure bearing plate, it is determined that the combination structure of the lower half of the test end seal cover and the test end pressure bearing plate meets the design requirements, and it is determined that the pipe thread structure between the upper half and the lower half of the test end seal cover has air leakage phenomenon, and the test is ended;

[0051] If air leakage occurs between the lower half of the test end seal cover and the test end pressure bearing plate, go to step 10;

[0052] Step 10. Detach the upper half of the test end seal cover from the lower half;

[0053] Remove the seal filling structure between the upper half and the lower half of the test end seal cover, and reassemble the pipe thread connection structure of the upper half of the test end seal cover on the lower half;

[0054] Seal the combination between the lower half of the test end seal cover and the test end pressure bearing plate with a seal filling structure;

[0055] Step 11. Repeat steps 5 to 7 to detect the sealing performance between the upper half and the lower half of the test end seal cover by the air tightness inspection liquid and make a record;

[0056] If no air leakage occurs between the upper half and the lower half of the test end seal cover, it is determined that the pipe thread structure between the upper half and the lower half of the test end seal cover meets the design requirements, and it is determined that the combination between the lower half of the test end seal cover and the test end pressure bearing plate has air leakage phenomenon, and the test is ended;

[0057] If air leakage occurs between the upper half and the lower half of the test end seal cover, it is determined that the combination between the lower half of the test end seal cover and the test end pressure bearing plate, and the pipe thread structure between the upper half and the lower half of the test end seal cover all have air leakage phenomenon, and the test is ended.

[0058] The detection method based on the detection tool forms a force working condition environment of a simulated cable clamp entity as much as possible to obtain the overall air tightness of the test end sealing cover and the air tightness of different combined parts, verify the product quality of the sealing cover as much as possible, obtain a high-accuracy detection result, and meet the technical requirements of the cable-stayed bridge structure on the sealing cover of the cable clamp screw assembly.

[0059] Further, the air pressure filled in the inflation cavity of the pressure cylinder is 5000 Pa to 7000 Pa, and the control valve of the inflation mechanism is slowly opened when the inflation mechanism injects pressure air into the inflation cavity.

[0060] The sealing filling structure between the lower half cover body of the sealing cover and the corresponding pressure bearing plate is a sealant filling structure.

[0061] The sealing filling structure between the upper half cover body and the lower half cover body of the sealing cover is a raw rubber tape filling structure.

[0062] The inflation pressure of the pressure cylinder is based on the extreme environment in which the sealing cover serves in an actual working condition environment, so that the air tightness performance of the sealing cover in the extreme environment can be simulated and detected, and the technical requirements of the sealing cover in the outdoor harsh working condition environment are met.

[0063] The control measure of the control valve of the inflation mechanism is special for the high pressure in the air compressor and the low pressure in the pressure cylinder, so as to prevent the pressure in the pressure cylinder from exceeding the standard when the air compressor sends the pressure into the pressure cylinder, and affect the normal development of the air tightness test and the detection result.

[0064] The sealing filling structure is selected according to different sealing parts of the sealing cover, and the sealing operation can be easily realized under the premise of meeting the sealing performance requirements.

[0065] The one or more technical solutions of the utility model have at least the following technical effects or advantages:

[0066] The utility model discloses to the particularity of screw assembly sealing protection of above-mentioned suspension bridge cable clamp, and the screw assembly and two groups of sealing covers that meet the actual product are assembled on the pressure cylinder that can inflate and simulates cable clamp locking stress state, make one group of sealing covers as sealing structure at one end of pressure cylinder, and the other group of sealing covers is as test structure at the other end of pressure cylinder, detect the air -tightness of the sealing cover as test structure by filling pressure gas in pressure cylinder, that is, the sealing performance is judged by the leakage situation of pressure gas from the inside of test end sealing cover, and the rationality of the product quality and design structure of sealing cover is verified, thereby obtaining the cable clamp screw assembly sealing cover that satisfies the technical requirement of suspension bridge structure. The utility model has the technical features of strong pertinence, forms the air -tightness detection of pressure gas to sealing cover while simulating actual stress state, and the detection result obtained is high in accuracy.

[0067] The utility model discloses to the particularity of screw assembly sealing protection of above-mentioned suspension bridge cable clamp, and the screw assembly and two groups of sealing covers that meet the actual product are assembled on the pressure cylinder that can inflate and simulates cable clamp locking stress state, make one group of sealing covers as sealing structure at one end of pressure cylinder, and the other group of sealing covers is as test structure at the other end of pressure cylinder, detect the air -tightness of the sealing cover as test structure by filling pressure gas in pressure cylinder, that is, the sealing performance is judged by the leakage situation of pressure gas from the inside of test end sealing cover, and the rationality of the product quality and design structure of sealing cover is verified, thereby obtaining the cable clamp screw assembly sealing cover that satisfies the technical requirement of suspension bridge structure. The utility model has the technical features of strong pertinence, forms the air -tightness detection of pressure gas to sealing cover while simulating actual stress state, and the detection result obtained is high in accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0068] The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model, form a part of the utility model, and do not constitute a limitation to the embodiments of the utility model;

[0069] Fig. 1 It is the effect schematic drawing of the utility model in tensioning assembly use time;

[0070] Fig. 2 It is the effect schematic drawing of the utility model in air -tightness test time;

[0071] Fig. 3 It is the structural schematic drawing of pressure cylinder in the utility model;

[0072] Wherein, 1-pressure cylinder;2-test end pressure plate, 3-tensioning end pressure plate;4-test end sealing cover;5-sealing end sealing cover;6-tensioning assembly;61-supporting foot;62-jack;63-pull sleeve;7-screw;8-fixed joint;9-inflatable tube;10-quick connector;11-pressure gauge;12-control valve;13-nut;14-outer spherical surface washer;15-inner spherical surface washer. DETAILED DESCRIPTION

[0073] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the present application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0074] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be practiced in other ways different from those described herein within the scope of the present application, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0075] Embodiment 1

[0076] With reference to Figs. 1-3 The present embodiment provides a kind of cable clamp screw assembly sealing cover airtightness detection tool, sealing cover has the lower half cover body of abutting to cable clamp pressure platform and wearing screw assembly, and the upper half cover body of being connected with lower half cover body with pipe thread structure and surrounding cover screw assembly corresponding end portion;

[0077] Wherein, sealing cover can select MJ45 sealing cover, the coating structure of sealing cover and the bottom structure of lower half cover body are matched with the sealing cover used by cable clamp entity respectively.

[0078] Detection tool has pressure cylinder 1, screw assembly and be applied to two groups of sealing cover of detection tool, the structure of the two groups of sealing cover is identical, only according to the different role in detection and be distinguished as test end sealing cover 4 and sealing end sealing cover 5;

[0079] Wherein, pressure cylinder 1 length is 460mm, width is 210mm, height is 200mm;

[0080] Screw assembly matches the screw assembly used by cable clamp entity;Screw assembly includes screw 7, nut 13, inner spherical washer 15 and outer spherical washer 14, screw 7 can select MJ45 screw, nut 13 can select MJ45 nut.

[0081] The inside of pressure cylinder 1 has inflation cavity, and the axial two ends of inflation cavity have relatively arranged test end pressure plate 2 and tension end pressure plate 3;

[0082] Wherein, test end pressure plate 2 and tension end pressure plate 3 have relatively arranged through holes on it, and the diameter of through hole is 55mm.

[0083] Screw assembly is axially worn on pressure cylinder 1 through test end pressure plate 2 and tension end pressure plate 3 of pressure cylinder 1, one end of screw assembly is connected with the lower half cover body of test end sealing cover 4 outside test end pressure plate 2, and the other end of screw assembly is connected with the lower half cover body of sealing end sealing cover 5 outside tension end pressure plate 3.

[0084] In the air tightness test, the upper half of the test end seal cover 4 is connected to the corresponding lower half by a pipe thread structure, the upper half of the seal end seal cover 5 is connected to the corresponding lower half by a pipe thread structure, and the pipe thread joint of the seal end seal cover 5 and the joint of the lower half and the tension end pressure plate 3 are respectively sealed and connected, and the inflation chamber of the pressure cylinder 1 is filled with gas at a test pressure.

[0085] The detection tool also has a tension assembly 6; before the air tightness test, the tension assembly 6 is connected to the end of the screw rod 7 outside the lower half of the seal end seal cover 5, and the screw rod assembly on the pressure cylinder 1 is pre-tensioned.

[0086] The tension assembly 6 has a support foot 61 abutting the outside of the tension end pressure plate 3 and arranged around the screw rod assembly, a jack 62 abutting the outer end of the support foot 61 and arranged around the screw rod assembly, and a pull sleeve 63 abutting the outer end of the jack 62 and threadedly connected to the corresponding outer end of the screw rod 7 in the inner hole of the jack 62.

[0087] The pressure cylinder 1 is composed of a hollow cylinder body, a test end pressure plate 2 and a tension end pressure plate 3 fixedly connected to both ends of the cylinder body, and the test end pressure plate 2 and the tension end pressure plate 3 form an inflation chamber inside the cylinder body.

[0088] The pressure cylinder 1 also has an inflation mechanism, and the cylinder body of the pressure cylinder 1 is provided with a gas hole communicating with the inflation mechanism;

[0089] The diameter of the gas hole is 20mm.

[0090] The inflation mechanism has a fixed joint 8, an inflation pipe 9, a quick joint 10, a pressure gauge 11 and a control valve 12, the fixed joint 8 is sealingly connected to the gas hole of the cylinder body, one end of the inflation pipe 9 is connected to the quick joint 10 and the other end is connected to a compressed air equipment, the quick joint 10 is detachably sealingly connected to the fixed joint 8, the pressure gauge 11 is connected to the inflation pipe 9 and used to measure the air pressure in the inflation chamber of the pressure cylinder 1, and the control valve 12 is connected to the inflation pipe 9 upstream of the pressure gauge 11 and used to control the air flow into the inflation chamber of the pressure cylinder 1.

[0091] The pressure gauge 11 is connected to the inflation pipe 9 through a pneumatic quick joint; in use, the control valve 12 is opened, the air of the compressed air equipment enters the inflation chamber through the inflation pipe 9, the quick joint 10 and the fixed joint 8, and when the air pressure value measured by the pressure gauge 11 reaches the test requirement, the control valve 12 is closed.

[0092] The parallelism of the test end bearing plate 2 and the tension end bearing plate 3 of the pressure cylinder 1 is 0.3 / total length, the outer side surface roughness of the test end bearing plate 2 and the tension end bearing plate 3 is 12.5 respectively, and the outer side surface of the test end bearing plate 2 and the tension end bearing plate 3 is coated with a coating structure matched with the cable clamp entity bearing platform.

[0093] The embodiment also provides a use method of the sealing cover airtightness detection tool for the cable clamp screw assembly, and the use method comprises the following process steps:

[0094] Step 1. Preparing the pressure cylinder 1, two groups of sealing covers, one group of screw assemblies and one group of tension assemblies 6;

[0095] Among the two groups of sealing covers, one group is used as the test end sealing cover 4, and the other group is used as the sealing end sealing cover 5;

[0096] Step 2. According to the wearing structure form of the sealing cover in the cable clamp entity, the screw assembly is axially worn through the test end bearing plate 2 and the tension end bearing plate 3 of the pressure cylinder 1, and the lower half cover body of the test end sealing cover 4 and the lower half cover body of the sealing end sealing cover 5 are fixed at the corresponding bearing plates of the pressure cylinder 1;

[0097] The tension assembly 6 is connected to the screw assembly outside the tension end bearing plate 3;

[0098] Step 3. Pre-tensioning and tensioning the screw assembly in the axial direction of the pressure cylinder 1 through the tension assembly 6 until the technical requirements of the pre-tensioning and tensioning of the screw assembly in the cable clamp entity are met;

[0099] Locking and fixing the screw assembly on the pressure cylinder 1;

[0100] Step 4. Removing the tension assembly 6;

[0101] The upper half cover body of the test end sealing cover 4 and the upper half cover body of the sealing end sealing cover 5 are connected to the corresponding lower half cover bodies in the pipe thread structure;

[0102] And the joint between the lower half cover body of the sealing end sealing cover 5 and the tension end bearing plate 3 and the pipe thread joint between the upper half cover body and the lower half cover body are respectively sealed;

[0103] Step 5. Coating airtightness checking liquid at the test end sealing cover 4 and the sealing end sealing cover 5 respectively;

[0104] Injecting pressure air into the inflation cavity through the inflation mechanism of the pressure cylinder 1;

[0105] The air pressure in the inflation cavity of the pressure cylinder 1 is 5000 Pa, and the control valve 12 of the inflation mechanism is slowly opened when the inflation mechanism injects pressure air into the inflation cavity.

[0106] Step 6. The sealing performance of the sealing end sealing cover 5 is detected by sealing the sealing end sealing cover 5 with the air tightness checking liquid, and the sealing structure is adjusted so that the sealing end sealing cover 5 does not leak air;

[0107] Step 7. The sealing performance of the test end sealing cover 4 is detected by the air tightness checking liquid at the test end sealing cover 4 and is recorded;

[0108] If there is no air leakage phenomenon at the test end sealing cover 4, the test end sealing cover 4 as a whole meets the design requirements, and the test test is ended;

[0109] If there is an air leakage phenomenon at the test end sealing cover 4, step 8 is entered;

[0110] Step 8. The upper half cover body of the test end sealing cover 4 is detached from the lower half cover body;

[0111] The pipe thread connection structure of the upper half cover body of the test end sealing cover 4 on the lower half cover body is reassembled with the sealing filling structure;

[0112] Step 9. Steps 5 to 7 are repeated, and the combined sealing performance between the lower half cover body of the test end sealing cover 4 and the test end pressure bearing plate 2 is detected by the air tightness checking liquid at the test end sealing cover 4 and is recorded;

[0113] If there is no air leakage phenomenon between the lower half cover body of the test end sealing cover 4 and the test end pressure bearing plate 2, it is determined that the combined structure of the lower half cover body of the test end sealing cover 4 and the test end pressure bearing plate 2 meets the design requirements, and it is determined that there is an air leakage phenomenon between the pipe thread structure of the upper half cover body and the lower half cover body of the test end sealing cover 4, and the test test is ended;

[0114] If there is an air leakage phenomenon between the lower half cover body of the test end sealing cover 4 and the test end pressure bearing plate 2, step 10 is entered;

[0115] Step 10. The upper half cover body of the test end sealing cover 4 is detached from the lower half cover body;

[0116] The sealing filling structure between the upper half cover body and the lower half cover body of the test end sealing cover 4 is removed, and the pipe thread connection structure of the upper half cover body of the test end sealing cover 4 on the lower half cover body is reassembled;

[0117] The combined part between the lower half cover body of the test end sealing cover 4 and the test end pressure bearing plate 2 is sealed with a sealing filling structure;

[0118] Step 11. Steps 5 to 7 are repeated, and the sealing performance of the combined part between the upper half cover body and the lower half cover body of the test end sealing cover 4 is detected by the air tightness checking liquid at the test end sealing cover 4 and is recorded;

[0119] If no air leakage phenomenon occurs between the upper half cover body and the lower half cover body of the test end sealing cover 4, it is determined that the pipe thread structure between the upper half cover body and the lower half cover body of the test end sealing cover 4 meets the design requirements, and it is determined that the air leakage phenomenon exists at the joint between the lower half cover body of the test end sealing cover 4 and the test end pressure bearing plate 2, and the test experiment ends;

[0120] If the air leakage phenomenon occurs between the upper half cover body and the lower half cover body of the test end sealing cover 4, it is determined that the air leakage phenomenon exists at the joint between the lower half cover body of the test end sealing cover 4 and the test end pressure bearing plate 2, and the pipe thread structure between the upper half cover body and the lower half cover body of the test end sealing cover 4, and the test experiment ends.

[0121] Wherein, the air tightness checking liquid is soap water, whether the air leakage phenomenon occurs is judged by observing whether the soap water bubbles, which can more directly judge whether the air leakage phenomenon occurs.

[0122] The sealing filling structure of the joint between the lower half cover body of the sealing cover and the corresponding pressure bearing plate in the embodiment is a sealing glue filling structure; and the sealing filling structure of the pipe thread joint between the upper half cover body and the lower half cover body of the sealing cover is a raw rubber tape filling structure.

[0123] Embodiment 2

[0124] The other contents of the embodiment are the same as those of Embodiment 1, and the difference lies in that:

[0125] The parallelism of the test end pressure bearing plate and the tension end pressure bearing plate of the pressure bearing air cylinder is 0.25 / total length, and the outer side surface roughness of the test end pressure bearing plate and the tension end pressure bearing plate is 12.4 respectively.

[0126] The air pressure filled in the inflation cavity of the pressure bearing air cylinder is 7000 Pa.

[0127] Embodiment 3

[0128] The other contents of the embodiment are the same as those of Embodiment 1, and the difference lies in that:

[0129] The parallelism of the test end pressure bearing plate and the tension end pressure bearing plate of the pressure bearing air cylinder is 0.23 / total length, and the outer side surface roughness of the test end pressure bearing plate and the tension end pressure bearing plate is 12.3 respectively.

[0130] The air pressure filled in the inflation cavity of the pressure bearing air cylinder is 6000 Pa.

[0131] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including all changes and modifications falling within the scope of the present application.

[0132] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A kind of cable clamp screw assembly sealing cover airtightness detection tool, the sealing cover has the lower half cover body of abutting to cable clamp pressure platform and wearing screw assembly, and the upper half cover body with the lower half cover body with pipe thread structure connection and cover screw assembly corresponding end portion; Its characterized in that: The detection tool has pressure cylinder (1) and screw assembly; The inside of the pressure cylinder (1) has inflation cavity, the axial both ends of the inflation cavity have oppositely arranged test end pressure plate (2) and tension end pressure plate (3); The screw assembly is axially worn on the pressure cylinder (1) through the test end pressure plate (2) and tension end pressure plate (3) of the pressure cylinder (1), one end of the screw assembly is connected with the lower half cover body of test end sealing cover (4) at the outside of the test end pressure plate (2), the other end of the screw assembly is connected with the lower half cover body of sealing end sealing cover (5) at the outside of the tension end pressure plate (3); During airtightness test, the upper half cover body of the test end sealing cover (4) is connected with corresponding lower half cover body with pipe thread structure, the upper half cover body of the sealing end sealing cover (5) is connected with corresponding lower half cover body with pipe thread structure, and the pipe thread joint of the sealing end sealing cover (5) and the joint of the lower half cover body and the tension end pressure plate (3) are sealed connection respectively, the inflation cavity of the pressure cylinder (1) is filled with gas of test pressure.

2. The cable clamp screw assembly sealing cover airtightness detection tool according to claim 1, wherein: The detection tool further has tensioning assembly (6); The tensioning assembly (6) is connected with the end of screw (7) at the outside of the lower half cover body of sealing end sealing cover (5) before airtightness test, and pre-tensioning is carried out on the screw assembly worn on the pressure cylinder (1).

3. The cable clamp screw assembly sealing cover airtightness detection tool according to claim 2, wherein: The tensioning assembly (6) has support leg (61) abutting to the outside of tension end pressure plate (3) and arranged around the screw assembly, jack (62) abutting to the outer end of the support leg (61) and around the screw assembly, and pullout sleeve (63) abutting to the outer end of the jack (62) and connected with the corresponding outer end of screw (7) of the screw assembly in the bore of the jack (62) with thread.

4. The cable clamp screw assembly sealing cover airtightness detection tool according to claim 1 or 2, wherein: The pressure cylinder (1) is composed of hollow structure cylinder and test end pressure plate (2) and tension end pressure plate (3) fixedly connected at both ends of the cylinder, and the test end pressure plate (2) and the tension end pressure plate (3) enclose inflation cavity in the cylinder.

5. The cable clamp screw assembly sealing cover airtightness detection tool according to claim 1, wherein: The pressure cylinder (1) further has inflation mechanism, and the cylinder of the pressure cylinder (1) is provided with air hole communicated with the inflation mechanism. The inflation mechanism has a fixed joint (8), an inflation pipe (9), a quick connector (10), a pressure gauge (11) and a control valve (12), the fixed joint (8) is sealingly connected to the air hole of the cylinder body, one end of the inflation pipe (9) is connected with the quick connector (10), the other end is connected with a compressed air device, the quick connector (10) is detachably sealingly connected with the fixed joint (8), the pressure gauge (11) is connected on the inflation pipe (9) and used for measuring the air pressure in the inflation cavity of the pressure cylinder (1), the control valve (12) is connected on the inflation pipe (9) upstream of the pressure gauge (11) and used for controlling the air flow into the inflation cavity of the pressure cylinder (1).

6. The sealing cover airtightness detection tool for the cable clamp screw rod assembly according to claim 1, characterized in that: The parallelism of the test end pressure plate (2) and the tension end pressure plate (3) of the pressure cylinder (1) is ≤0.3 / total length, the roughness of the outer side surface of the test end pressure plate (2) and the tension end pressure plate (3) is respectively ≤12.5, and the outer side surface of the test end pressure plate (2) and the tension end pressure plate (3) is respectively coated with a coating structure matching the cable clamp solid pressure platform.

7. The sealing cover airtightness detection tool for the cable clamp screw rod assembly according to claim 1, characterized in that: The coating structure of the sealing cover and the bottom structure of the lower half cover body respectively match the sealing cover used by the cable clamp solid body.

8. The sealing cover airtightness detection tool for the cable clamp screw rod assembly according to claim 1, characterized in that: The screw rod assembly matches the screw rod assembly used by the cable clamp solid body.

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