Oil depot grounding resistance detection device easy to install and maintain

Abstract

The invention discloses an oil depot grounding resistance detection device easy to install and maintain, a first fixing head is fixed to a shell through two locking blocks in an inserted mode, the interior of the shell is designed to be hollow to form an installation cavity, locking structures used for locking the two locking blocks are installed in the installation cavity in a front-back symmetry mode, a pull rod is fixed between the two locking structures, and the pull rod is connected with the first fixing head. The pull rod is slidably connected with the isolation cover, two communicating structures are symmetrically mounted in the front and back of the mounting cavity, the two communicating structures are slidably connected with the two locking structures correspondingly, and a self-adaptive contact structure used for allowing the electrode to slide front and back is further mounted in the mounting cavity and slidably connected with the two communicating structures; the locking teeth of the right trapezoid structure are meshed with the tooth grooves, rapid splicing of the first fixing head and the second fixing head is achieved, the self-adaptive contact structure is matched with the pressing spring, the retaining groove and other components, and therefore the contact distance and pressure of the electrode can be automatically adjusted according to the thickness of the grounding down lead.

Description

Technical Field

[0001] This invention relates to the field of grounding resistance detection, and in particular to a grounding resistance detection device for oil depots that is easy to install and maintain. Background Technology

[0002] In flammable and explosive hazardous locations such as oil depots, the reliability of the grounding system is directly related to safe production. Grounding resistance, as a core indicator of grounding system performance, is crucial for ensuring the safety of equipment and personnel through regular testing. Existing testing devices use a single, integrated clamp—a complete rectangular metal piece with a through-hole for mounting. The clamp is fitted onto the grounding down conductor from top to bottom and secured with bolts, making installation complex. Furthermore, the traditional device uses a fixed electrode contact method, which cannot adaptively adjust to different thicknesses and surface flatnesses of the grounding down conductor, easily leading to poor contact and significant errors in the test data. Additionally, static electricity easily accumulates on the surface of the grounding down conductor, potentially generating electric sparks when the electrode contacts the ground wire during testing, posing a significant safety hazard in the flammable and explosive environment of an oil depot. Summary of the Invention

[0003] The present invention proposes an easy-to-install and maintain oil depot grounding resistance detection device, which solves the above-mentioned problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An easy-to-install and maintain oil depot grounding resistance detection device includes a data acquisition unit and a clamp head. The clamp head includes a first fixing head and a second fixing head. The first fixing head has locking blocks symmetrically fixed at both ends, and a pressure block is fixed in the middle. The second fixing head has an isolation cover fixed in the middle. Electrodes are slidably installed inside the isolation cover. The second fixing head includes a housing and a cover plate. The first fixing head is fixed to the housing by two locking blocks, and the cover plate is fixed to the top of the housing by screws. During installation, the first and second fixing heads are pressed and fixed to the grounding lead wire by the isolation cover and pressure block, with the electrodes in contact with the surface of the grounding lead wire. The sensor in the data acquisition unit first sends an excitation pulse signal to the grounding circuit under test, inducing a pulse potential E in the circuit. Under the action of potential E, the circuit under test will generate a current I. The sensor measures E and I, and the resistance of the circuit under test can be obtained using the formula R=E / I. The housing has a hollow interior to form an installation cavity. Within this cavity, locking structures for locking two locking blocks are symmetrically installed front to back. A pull rod is fixed between the two locking structures and is slidably connected to the isolation cover. Two sets of connecting structures are symmetrically installed front to back within the installation cavity, each slidably connected to one of the two locking structures. An adaptive contact structure for the electrode to slide back and forth is also installed within the installation cavity, slidably connected to the two connecting structures.

[0005] Preferably, the isolation cover includes a fixed cover fixed in the middle of the shell, and an abutment cover slidably installed inside the fixed cover. The fixed cover and the abutment cover have a convex cross-section. The abutment cover can be slidably inserted into the fixed cover. Both the abutment cover and the fixed cover are made of a subconducting material, which can slowly release static electricity from the surface of the grounding wire through the subconducting material. A spring pin is fixed at each of the four corners at the tail end of the abutment cover. The other end of the spring pin is fixed to the shell. The spring pin makes the abutment cover always tend to move outward away from the shell.

[0006] Preferably, the lower surface of the locking block is provided with a locking part, which is composed of multiple linearly distributed tooth grooves, and the housing is provided with an insertion interface; The locking structure includes a locking head that slides up and down within the housing mounting cavity. The locking head has a T-shaped design and multiple locking teeth are provided at the top of the locking head. The cross-sections of the locking teeth and the tooth grooves are all right-angled trapezoidal structures. The inclined surface of the locking block away from the fixed head is provided to form a pressing inclined surface. The locking teeth mesh with the tooth grooves on the locking part. The locking block is inserted into the insertion interface, and the pressing inclined surface on the locking block can contact the locking teeth and press the locking head downward. Similarly, the inclined surface on the tooth groove can also press the locking teeth downward, so that the locking block can be directly inserted into the locking head from left to right. Due to the right angle surface on the locking teeth and tooth groove, the locking block cannot move in the opposite direction. That is, the locking teeth make the locking block only move in one direction to the right. A locking spring is fixed to the bottom end of the locking head. The bottom end of the locking spring abuts against the bottom end of the mounting cavity. The locking spring makes the locking head always tend to move upward, thereby ensuring the locking teeth and locking block are locked.

[0007] Preferably, the housing is provided with a lifting slide groove, and the pull rod fixed between the two locking heads is slidably inserted into the lifting slide groove to guide the pull rod and locking heads to move up and down. The pull rod is provided with a limit port, and the lower end of the abutment cover is fixed with a limit head, which is arranged in an L-shaped structure. In the normal state, that is, when the abutment cover is only subjected to the elastic force of the spring pin and is at its farthest distance from the housing, and the locking head is at the top, the limiting head is locked in the limiting port, so that the pull rod cannot move down. When the pull rod cannot move down, the locking head also cannot move down, and the locking block cannot be inserted into the insertion interface to lock with the locking head.

[0008] The connecting structure includes two guide members fixed in the mounting cavity, and a movable block slidably installed between the two guide members. The movable block has a T-shaped structure. Each guide member includes a guide post fixed in the mounting cavity, and a return spring is sleeved on the guide post. The movable block is sleeved on the guide post, and the return spring abuts against the movable block and the inner wall of the mounting cavity. The return spring causes the movable block to always have a tendency to move towards the locking head. A movable roller is fixed below the movable block. A drive plate is slidably installed at the bottom of the mounting cavity. A drive head is integrally formed at the end of the drive plate near the movable block. A movable part is opened on the drive head, and the movable roller is slidably inserted into the movable part. The drive board has a linear groove, and a linear slider is slidably inserted into the linear groove. The linear slider is fixed to the bottom of the inner wall of the mounting cavity by screws. The linear slider is used for linear guidance of the drive board.

[0009] Preferably, the moving part includes an inclined moving groove, and a retaining groove is provided at one end of the moving groove near the driving head, which is parallel to the guide member; When the distance between the moving block and the locking head is the closest, the moving roller is at the rear end of the moving groove, that is, the end furthest from the holding groove. When the locking block is inserted into the mounting cavity, the locking block will contact the moving block and push the moving block to move away from the locking head. At this time, the moving roller will move along the moving groove toward the holding groove, thereby pushing the entire drive plate and drive head toward the center of the mounting cavity, that is, the drive plates in the two connected structures move closer to each other.

[0010] Preferably, the housing has a circular hole, the adaptive contact structure includes a wire sleeve that is slidably inserted into the circular hole, one end of the wire sleeve outside the housing extends into the isolation cover, and a lifting member is fixed to this end. The electrode is fixed to the lifting member. Two sets of sliding blocks that are symmetrically distributed front and back are welded to one end of the wire sleeve inside the housing. The sliding blocks have inclined drive grooves. A drive roller is fixed on the drive plate, and the drive rollers in the two connected structures are respectively fixedly inserted into the two drive grooves. When the locking block is inserted into the mounting cavity and the two drive plates are pushed closer to each other by the moving block, the drive roller on the drive plate will move the wire sleeve outward through the drive groove, thereby moving the electrode outward away from the housing and closer to the grounding lead. When the locking block is fully inserted, the moving roller moves into the retaining groove, and the electrode contacts the surface of the grounding lead.

[0011] Preferably, the data acquisition device is connected to the electrode via a connecting wire passing through the wire sleeve. The lifting component includes a mounting plate fixed to one end of the wire sleeve inside the isolation cover. The housing has four rectangular openings that extend through the mounting plate to form through holes. Guide rods are slidably inserted into the through holes. Electrodes are fixed on the four guide rods. Compression springs are sleeved on the guide rods. The two ends of the compression springs abut against the mounting plate and the electrode, respectively. The compression springs cause the electrode to always tend to move forward away from the mounting plate. The tail end of the guide rod is slidably inserted into the through hole. A limit ring is provided on the guide rod to ensure that the guide rod does not detach from the mounting plate.

[0012] The beneficial effects of this invention are: 1. This device adopts a plug-in locking design of locking blocks and locking structures. Through the engagement of locking teeth and grooves of the right-angled trapezoidal structure, the first and second fixing heads can be quickly spliced ​​together without the need for additional tools. At the same time, the adaptive contact structure, together with components such as pressure springs and retaining grooves, allows the electrodes to automatically adjust the contact distance and pressure according to the thickness of the grounding lead. Regardless of the grounding lead of different specifications or the surface of slight unevenness, it can ensure stable fit, greatly improving the adaptability and installation efficiency of the device.

[0013] 2. The isolation cover is made of a semi-conductive material, which can slowly release the static electricity on the surface of the grounding lead wire, avoiding electric sparks caused by electrostatic discharge during testing; and through the linkage design of the limit head and the pull rod, the fixing head one can only lock with the fixing head two after the isolation cover is completely in contact with the grounding lead wire and forms a sealed space, ensuring that the electrode contact process is in an isolated and protected state, thus eliminating safety hazards in flammable and explosive environments from a structural perspective.

[0014] 3. The device adopts a modular disassembly design. Fixed head one and fixed head two are fixed by locking blocks. During disassembly, simply pull down the lever to unlock, which facilitates quick disassembly and maintenance. Easily damaged parts such as electrodes and connecting wires are detachably connected through wire sleeves, mounting plates and other structures, making the replacement process simple and efficient. Each moving part is equipped with a reset spring, guide and other buffer guiding structure, which reduces the wear of parts and extends the overall service life of the device.

[0015] 4. The locking structure, connecting structure and adaptive contact structure form a linkage mechanism. During installation, as the locking block is inserted, the electrode is automatically driven to extend and fit against the grounding lead, eliminating the need for additional manual adjustment and simplifying the operation process. The spring pin design of the isolation cover ensures that the abutment cover always maintains a close fit with the grounding lead, further improving the stability of the device after installation and reducing the impact of human error. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the three-point method for detecting the grounding resistance of an oil depot, which is easy to install and maintain, as proposed in this invention. Figure 2 This is a schematic diagram of the structure of an oil depot grounding resistance detection device that is easy to install and maintain, as proposed in this invention. Figure 3 for Figure 2 Top view of the middle clamp head; Figure 4 for Figure 3 Exploded view of the middle clamp head; Figure 5 for Figure 4 Internal top view of the fixed head 2; Figure 6 for Figure 4 Exploded view of the second fixed head; Figure 7 for Figure 6 A schematic diagram of the locking structure, the connecting structure, and the adaptive contact structure; Figure 8 for Figure 7 A bottom view; Figure 9 for Figure 8 Enlarged view of a portion of the image; Figure 10 An exploded view of the structural schematic diagrams of the locking structure, the connecting structure, and the adaptive contact structure; Figure 11 for Figure 10 A top view of the adaptive contact structure.

[0017] Numbering on the map: 1. Data acquisition device; 11. Connecting cable; 2. Fixing head 1; 21. Pressure block; 22. Locking block; 221. Locking part; 3. Fixed head 2; 31. Housing; 32. Cover plate; 4. Isolation cover; 41. Fixing cover; 42. Abutment cover; 421. Limiting head; 43. Spring pin; 5. Electrodes; 6. Locking structure; 61. Locking head; 611. Locking teeth; 62. Pull rod; 63. Locking spring; 7. Connecting structure; 71. Drive plate; 711. Linear chute; 712. Linear slider; 713. Drive roller; 72. Drive head; 73. Moving part; 731. Moving groove; 732. Holding groove; 74. Moving block; 741. Moving roller; 75. Guide component; 8. Adaptive contact structure; 81. Wire sleeve; 82. Sliding block; 83. Drive groove; 84. Guide rod; 85. Compression spring; 86. Mounting plate. Detailed Implementation

[0018] 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. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Reference Figure 1 - Figure 11 An easy-to-install and maintain oil depot grounding resistance detection device includes a data acquisition unit 1 and a clamp head. The clamp head includes a first fixing head 2 and a second fixing head 3. The first fixing head 2 has locking blocks 22 symmetrically fixed at its front and rear ends, and a pressure block 21 fixed in the middle. The second fixing head 3 has an isolation cover 4 fixed in the middle. Electrodes 5 are slidably installed inside the isolation cover 4. The second fixing head 3 includes a housing 31 and a cover plate 32. The first fixing head 2 is fixed to the housing 31 by two locking blocks 22. The cover plate 32 is screwed onto the top of the housing 31. During installation, the first fixing head 2 and the second fixing head 3 are pressed and fixed onto the grounding lead wire by the isolation cover 4 and the pressure block 21, and the electrodes 5 are attached to the surface of the grounding lead wire. The sensor in the data acquisition unit 1 first sends an excitation pulse signal to the grounding circuit under test, inducing a pulse potential E in the circuit under test. Under the action of potential E, a current I is generated in the circuit under test. The sensor measures E and I, and the resistance of the circuit under test can be obtained by the formula R=E / I. The housing 31 has a hollow interior to form an installation cavity. The installation cavity is symmetrically equipped with locking structures 6 for locking two locking blocks 22. A pull rod 62 is fixed between the two locking structures 6 and is slidably connected to the isolation cover 4. The installation cavity is symmetrically equipped with two sets of connecting structures 7. The two connecting structures 7 are slidably connected to the two locking structures 6 respectively. The installation cavity is also equipped with an adaptive contact structure 8 for sliding the electrode 5 back and forth. The adaptive contact structure 8 is slidably connected to the two connecting structures 7.

[0020] Reference Figure 10 The isolation cover 4 includes a fixed cover 41 fixed in the middle of the housing 31. An abutment cover 42 is slidably installed inside the fixed cover 41. The fixed cover 41 and the abutment cover 42 have a convex cross-section. The abutment cover 42 can be slidably inserted into the fixed cover 41. Both the abutment cover 42 and the fixed cover 41 are made of a subconducting material, which can slowly release static electricity from the ground wire surface through the subconducting material. A spring pin 43 is fixed at each of the four corners at the tail end of the abutment cover 42. The other end of the spring pin 43 is fixed to the housing 31. The spring pin 43 makes the abutment cover 42 always tend to move outward away from the housing 31.

[0021] Reference Figure 7 - Figure 10The lower surface of the locking block 22 is provided with a locking part 221, which is composed of multiple linearly distributed tooth grooves, and the housing 31 is provided with an insertion interface. The locking structure 6 includes a locking head 61 that slides vertically within the mounting cavity of the housing 31. The locking head 61 has a T-shaped design, and its top end has multiple locking teeth 611. The cross-sections of the locking teeth 611 and the tooth grooves are all right-angled trapezoidal structures. The end of the locking block 22 away from the fixed head 2 has a beveled surface forming a pressing slope. The locking teeth 611 mesh with the tooth grooves on the locking part 221. When the locking block 22 is inserted into the insertion interface, the pressing slope on the locking block 22 contacts the locking teeth 611 and presses the locking head 61 downwards. Similarly, the tooth grooves... The inclined surface can also press the locking teeth 611 downwards, so that the locking block 22 can be directly inserted into the locking head 61 from left to right. Due to the right angle on the locking teeth 611 and the tooth groove, the locking block 22 cannot move in the opposite direction. That is, the locking teeth 611 make the locking block 22 only move to the right. The bottom end of the locking head 61 is fixed with a locking spring 63. The bottom end of the locking spring 63 abuts against the bottom end inside the mounting cavity. The locking spring 63 makes the locking head 61 always have an upward tendency, thereby ensuring the locking of the locking teeth 611 and the locking block 22.

[0022] Reference Figure 4 - Figure 10 The housing 31 has a lifting slide groove. The pull rod 62 fixed between the two locking heads 61 is slidably inserted into the lifting slide groove to guide the pull rod 62 and the locking head 61 to move up and down. The pull rod 62 has a limit port. A limit head 421 is fixed at the lower end of the abutment cover 42. The limit head 421 is set in an L-shaped structure. In the normal state, that is, when the abutment cover 42 is only subjected to the elastic force of the spring pin 43 and is farthest from the housing 31, and the locking head 61 is in the upper position, the limiting head 421 is engaged in the limiting port, so that the pull rod 62 cannot move downward. When the pull rod 62 cannot move downward, the locking head 61 also cannot move downward, and the locking block 22 cannot be inserted into the insertion interface to lock with the locking head 61. In actual use, first bring the fixing head 2 3 close to the grounding lead wire and move the fixing head 2 3 toward the grounding lead wire side so that the contact cover 42 is tightly attached to the surface of the grounding lead wire. At this time, the contact cover 42 will move a distance toward the housing 31 side and be in a compressed state. The limiting head 421 will also disengage from the limiting port, and the pull rod 62 can move downward. Only then can the fixing head 1 2 be connected with the fixing head 2 3. This structural design ensures that the fixing head 1 2 can only be installed after the isolation cover 4 has been sealed in contact with the grounding lead wire. This ensures that when the built-in electrode 5 comes into contact with the grounding lead wire, the isolation cover 4 can first release the surface static electricity of the grounding lead wire. The isolation cover 4 keeps it in a sealed space, so even if there is an electric spark generated by static electricity during contact, it cannot be leaked out, thus ensuring safety.

[0023] Reference Figure 5 - Figure 10 The connecting structure 7 includes two guide members 75 fixed in the mounting cavity. A movable block 74 is slidably installed between the two guide members 75. The movable block 74 has a T-shaped structure. The guide member 75 includes a guide post fixed in the mounting cavity. A return spring is sleeved on the guide post. The movable block 74 is sleeved on the guide post. The return spring abuts against the movable block 74 and the inner wall of the mounting cavity. The return spring makes the movable block 74 always tend to move towards the locking head 61. A movable roller 741 is fixed below the movable block 74. A drive plate 71 is slidably installed at the bottom of the mounting cavity. A drive head 72 is integrally formed at the end of the drive plate 71 near the movable block 74. A movable part 73 is opened on the drive head 72. The movable roller 741 is slidably inserted into the movable part 73. The drive plate 71 has a linear slide groove 711, and a linear slider 712 is slidably inserted into the linear slide groove 711. The linear slider 712 is fixed to the bottom of the inner wall of the mounting cavity by screws. The linear slider 712 is used for linear guidance of the drive plate 71.

[0024] The moving part 73 includes an inclined moving groove 731, and a retaining groove 732 is provided at one end of the moving groove 731 near the drive head 72, which is parallel to the guide member 75. When the distance between the moving block 74 and the locking head 61 is the closest, the moving roller 741 is at the rear end of the moving groove 731, that is, the end furthest from the holding groove 732. When the locking block 22 is inserted into the mounting cavity, the locking block 22 will contact the moving block 74 and push the moving block 74 to move away from the locking head 61. At this time, the moving roller 741 will move along the moving groove 731 toward the holding groove 732, thereby pushing the entire drive plate 71 and the drive head 72 toward the center of the mounting cavity, that is, the drive plates 71 in the two connected structures 7 move closer to each other.

[0025] Reference Figure 5 - Figure 11 The housing 31 has a circular hole. The adaptive contact structure 8 includes a wire sleeve 81 that is slidably inserted into the circular hole. One end of the wire sleeve 81 outside the housing 31 extends into the isolation cover 4 and is fixed with a lifting member. The electrode 5 is fixed on the lifting member. Two sets of sliding blocks 82 symmetrically distributed front and back are welded to one end of the wire sleeve 81 inside the housing 31. The sliding blocks 82 have inclined drive grooves 83. The drive plate 71 is fixed with a drive roller 713. The drive rollers 713 in the two connecting structures 7 are respectively fixedly inserted into the two drive grooves 83. When the locking block 22 is inserted into the mounting cavity and the two drive plates 71 are pushed closer to each other by the moving block 74, the drive roller 713 on the drive plate 71 will move the wire sleeve 81 outward through the drive groove 83, thereby causing the electrode 5 to move outward away from the housing 31 and closer to the grounding lead. When the locking block 22 is fully inserted, the moving roller 741 moves into the retaining groove 732, and the electrode 5 contacts the surface of the grounding lead. If the thickness of the grounding lead is small, the locking block 22 needs to be inserted further inward to ensure that the isolation cover 4, the pressure block 21 and the surface of the grounding lead are in contact. When the locking block 22 continues to be inserted inward, the moving roller 741 on the moving block 74 always moves in the holding groove 732, so the position of the drive plate 71 remains unchanged, that is, the wire sleeve 81 will not continue to move forward, avoiding the wire sleeve 81 being too short and causing it to fully elongate. This makes the fixing head 1 2 and fixing head 2 3 suitable for fixing grounding leads of various thicknesses.

[0026] The data acquisition device 1 is connected to the electrode 5 via the connecting wire 11 passing through the wire sleeve 81. The lifting component includes a mounting plate 86 fixed to one end of the wire sleeve 81 inside the isolation cover 4. The housing 31 has four rectangular openings that extend through the mounting plate 86 to form through holes. Guide rods 84 are slidably inserted into the through holes. The electrode 5 is fixed on the four guide rods 84. A compression spring 85 is sleeved on the guide rod 84. The two ends of the compression spring 85 abut against the mounting plate 86 and the electrode 5, respectively. The compression spring 85 makes the electrode 5 always tend to move forward away from the mounting plate 86. The tail end of the guide rod 84 is slidably inserted into the through hole. A limit ring is provided on the guide rod 84 to ensure that the guide rod 84 will not detach from the mounting plate 86. When the conductor sleeve 81 moves to the farthest end, the electrode 5 is located on the front side outside the isolation cover 4 under the action of the pressure spring 85. When the fixing head 2 3 and fixing head 1 2 are fixed on the surface of the grounding lead, the electrode 5 is always in contact with the surface of the grounding lead under the action of the pressure spring 85. After cooperating with the connecting structure 7, it is suitable for fixing grounding leads of various thicknesses.

[0027] Working principle: In actual use, the grounding electrode under test is A, and two auxiliary grounding electrodes B and C are made. Grounding electrodes A, B, and C are connected together on the ground. A clamp is installed on the grounding lead of each of the three grounding electrodes, and the clamp is connected to the data acquisition instrument 1 via a line. This allows for accurate measurement of the grounding resistance value at point A, calculated as follows: R1=RA+RB∥RC R2=RB+RA∥RC R3=RC+RA∥RB Where R1, R2, and R3 are the detection results of the monitoring instrument, and RA, RB, and RC are the grounding resistance values ​​of the three grounding electrodes to the ground. By solving the above three ternary equations, the grounding resistance value of the grounding electrode RA under test can be accurately obtained. At the same time, the grounding resistance values ​​of the auxiliary grounding electrodes RB and RC, as well as the grounding resistance value after the three points RA, RB, and RC are connected in parallel, can also be known. Since the added auxiliary ground electrodes B and C are connected in parallel to the ground electrode A under test, the actual grounding resistance value after parallel connection will be less than RA, thus improving the grounding resistance of the ground electrode under test. RA∥RB∥RC<RA. In actual construction, the grounding resistance values ​​of the auxiliary ground electrodes B and C should be controlled within 10 times the standard requirement value of the grounding system under test. If the project requires the grounding resistance value not to exceed 4Ω, then RC<40Ω and RB<40Ω. Of course, the smaller RB and RC are, the better, as they will further improve the grounding system under test.

[0028] When installing the clamp head, first bring the fixing head 3 close to the grounding lead wire and move the fixing head 3 toward the grounding lead wire side so that the contact cover 42 is tightly attached to the surface of the grounding lead wire. At this time, the contact cover 42 will move a distance toward the housing 31 side and be in a compressed state. The limiting head 421 will also be disengaged from the limiting port, and the pull rod 62 can then move downward. Next, fix head 2 is brought close to fix head 3, and locking block 22 on fix head 2 is inserted into the insertion interface of housing 31. Since the cross-section of locking tooth 611 and tooth groove is a right trapezoidal structure, and the inclined surface of the end of locking block 22 away from fix head 2 is set to form a pressing inclined surface, when locking block 22 is inserted into the insertion interface, the pressing inclined surface on locking block 22 can contact locking tooth 611 and press locking head 61 downward. Similarly, the inclined surface on tooth groove can also press locking tooth 611 downward, so that locking block 22 can be directly inserted into locking head 61 from left to right. Since the right angle on locking tooth 611 and tooth groove, locking block 22 cannot move in the opposite direction. That is, locking tooth 611 makes locking block 22 only able to move in one direction to the right. After the locking block 22 is inserted into the insertion interface of the housing 31, it will also contact the moving block 74 and push the moving block 74 to move away from the locking head 61. At this time, the moving roller 741 will move along the moving groove 731 toward one end of the holding groove 732, thereby pushing the entire drive plate 71 and the drive head 72 toward the center of the mounting cavity, that is, the drive plates 71 in the two connected structures 7 move closer to each other. When the locking block 22 is inserted into the mounting cavity and the two drive plates 71 are pushed closer to each other by the moving block 74, the drive roller 713 on the drive plate 71 will move the wire sleeve 81 outward through the drive groove 83, thereby causing the electrode 5 to move outward away from the housing 31 and closer to the grounding lead. The electrode 5 will contact the grounding lead, and as it continues to move, the electrode 5 will be tightly attached to the surface of the grounding lead under the action of the pressure spring 85. Then, the ground resistance can be detected by the above method.

[0029] When it is necessary to release the fixation, pull the lever 62 downwards, which will cause the locking head 61 to move downwards and disengage from the locking block 22. Then the fixing head 2 can be pulled out directly. After being pulled out, the moving block 74, the drive plate 71 and the wire sleeve 81 will return to their initial positions under the action of the reset spring in the guide 75, and the electrode 5 will retract into the isolation cover 4.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An easy-to-install and maintain oil depot grounding resistance detection device, characterized in that, The device includes a data acquisition unit (1) and a clamping head. The clamping head includes a first fixing head (2) and a second fixing head (3). The first fixing head (2) has locking blocks (22) symmetrically fixed at both ends, and a pressure block (21) is fixed in the middle of the first fixing head (2). The second fixing head (3) has an isolation cover (4) fixed in the middle. Electrodes (5) are slidably installed inside the isolation cover (4). The second fixing head (3) includes a housing (31) and a cover plate (32). The first fixing head (2) is fixed to the housing (31) by two locking blocks (22). Inside the housing (31) is... The cavity is designed to form an installation cavity. The cavity is symmetrically equipped with locking structures (6) for locking two locking blocks (22). A pull rod (62) is fixed between the two locking structures (6) and the pull rod (62) is slidably connected to the isolation cover (4). The cavity is symmetrically equipped with two sets of connecting structures (7). The two connecting structures (7) are slidably connected to the two locking structures (6) respectively. The cavity is also equipped with an adaptive contact structure (8) for sliding the electrode (5) back and forth. The adaptive contact structure (8) is slidably connected to the two connecting structures (7).

2. The oil depot grounding resistance detection device that is easy to install and maintain according to claim 1, characterized in that, The isolation cover (4) includes a fixed cover (41) fixed in the middle of the housing (31), and an abutment cover (42) is slidably installed on the inner side of the fixed cover (41). A spring pin (43) is fixed at each of the four corners of the tail end of the abutment cover (42), and the other end of the spring pin (43) is fixed to the housing (31).

3. The oil depot grounding resistance detection device that is easy to install and maintain according to claim 2, characterized in that, The lower surface of the locking block (22) is provided with a locking part (221), which is composed of multiple linearly distributed tooth grooves. The housing (31) is provided with an insertion interface. The locking structure (6) includes a locking head (61) that is slidably installed in the mounting cavity of the housing (31). The locking head (61) has a T-shaped structure design. The top of the locking head (61) is provided with multiple locking teeth (611). The bottom of the locking head (61) is fixed with a locking spring (63). The bottom of the locking spring (63) abuts against the bottom of the mounting cavity.

4. The oil depot grounding resistance detection device that is easy to install and maintain according to claim 3, characterized in that, The housing (31) is provided with a lifting slide groove, and the pull rod (62) fixed between the two locking heads (61) is slidably inserted into the lifting slide groove. The pull rod (62) is provided with a limit port. The lower end of the abutment cover (42) is fixed with a limit head (421), and the limit head (421) is set in an L-shaped structure.

5. The oil depot grounding resistance detection device that is easy to install and maintain according to claim 4, characterized in that, The connecting structure (7) includes two guide members (75) fixed in the mounting cavity, a movable block (74) is slidably installed between the two guide members (75), a drive plate (71) is slidably installed at the bottom of the mounting cavity, a drive head (72) is integrally formed on one end of the drive plate (71) near the movable block 74, a movable part (73) is provided on the drive head (72), and the movable roller (741) is slidably inserted into the movable part (73); The drive plate (71) has a linear slide groove (711), and a linear slider (712) is slidably inserted into the linear slide groove (711). The linear slider (712) is fixed to the bottom of the inner wall of the mounting cavity by screws.

6. The oil depot grounding resistance detection device that is easy to install and maintain according to claim 5, characterized in that, The moving part (73) includes an inclined moving groove (731), and a retaining groove (732) is provided at one end of the moving groove (731) near the drive head (72) and is distributed parallel to the guide (75).

7. The oil depot grounding resistance detection device that is easy to install and maintain according to claim 6, characterized in that, The housing (31) has a circular hole. The adaptive contact structure (8) includes a wire sleeve (81) that is slidably inserted into the circular hole. One end of the wire sleeve (81) outside the housing (31) extends into the isolation cover (4) and is fixed with a lifting member. The electrode (5) is fixed on the lifting member. Two sets of sliding blocks (82) that are symmetrically distributed front and back are welded to one end of the wire sleeve (81) inside the housing (31). The sliding block (82) has an inclined drive groove (83). The drive plate (71) has a drive roller (713) fixed on it. The drive rollers (713) in the two connected structures (7) are respectively fixedly inserted into the two drive grooves (83).

8. The oil depot grounding resistance detection device that is easy to install and maintain according to claim 7, characterized in that, The acquisition device (1) is connected to the electrode (5) through the connecting wire (11) through the wire sleeve (81). The lifting component includes a mounting plate (86) fixed at one end of the wire sleeve (81) inside the isolation cover (4). The housing (31) has four rectangular openings that extend through the mounting plate (86) to form a through hole. A guide rod (84) is slidably inserted into the through hole. The electrode (5) is fixed on the four guide rods (84). A pressure spring (85) is sleeved on the guide rod (84). The two ends of the pressure spring (85) abut against the mounting plate (86) and the electrode (5) respectively.

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