Grounding resistance measuring instrument with sealing structure
By employing a combination design of sealing ring, return spring and electric push rod in the grounding resistance measuring instrument, a high-efficiency sealing system is formed, which solves the problem of sealing performance being affected by the environment, and achieves effective protection and improved reliability under harsh conditions.
Patent Information
- Application Number
- CN202422872683.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2034-11-25
AI Technical Summary
Existing grounding resistance measuring instruments have a simple structure and rely on a single sealing ring, which makes their sealing performance susceptible to long-term use and external environmental factors. They are difficult to adapt to complex and ever-changing measurement environments, and their sealing effect is greatly reduced, especially under harsh conditions.
A grounding resistance measuring instrument with a sealed structure was designed. It uses the synergistic effect of a sealing ring and a return spring, combined with an electric push rod and a damper, to form a highly efficient sealing system, ensuring smooth opening and closing of the cover and enhancing the stability and durability of the seal.
It effectively prevents dust and moisture from entering, protects the internal detector body and electronic components, ensures the accuracy and reliability of the measuring instrument in harsh environments, extends its service life, and improves the user experience.
Smart Images
Figure CN223977289U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of grounding resistance measuring instruments, and in particular relates to a grounding resistance measuring instrument with a sealed structure. Background Technology
[0002] A grounding resistance meter, also known as a grounding resistance tester, is an instrument specifically designed to directly measure the grounding resistance of various grounding devices. It is widely used in power, postal and telecommunications, railway, communications, mining and other sectors to measure the grounding resistance of various devices and the resistance of low-resistance conductors. It can also measure soil resistivity and ground voltage.
[0003] In practical applications, grounding resistance measuring instruments may operate under various harsh environmental conditions, such as high temperature, humidity, and dust. These environmental factors may damage the internal structure and circuitry of the measuring instrument, thereby affecting its measurement accuracy and service life.
[0004] Existing ground resistance measuring instruments are structurally limited, especially in their sealing performance, which often relies on a single sealing ring. After prolonged use or exposure to external environmental factors such as high and low temperatures and humidity changes, a single sealing ring is prone to aging, deformation, or loss of elasticity, resulting in a decline in sealing performance. Different measurement environments and application scenarios have different requirements for sealing performance, and a single sealing ring may not be able to adapt to various complex environments, especially under harsh conditions such as strong winds, heavy rain, and sandstorms, where its sealing performance is greatly reduced. Utility Model Content
[0005] This utility model provides a grounding resistance measuring instrument with a sealed structure, aiming to solve the problem that existing grounding resistance measuring instruments have a simple structure and rely on a single sealing ring, which makes their sealing performance susceptible to long-term use and external environmental influences, making them difficult to adapt to complex and changing measurement environments, especially under harsh conditions where the sealing effect is greatly reduced.
[0006] This utility model is implemented as follows: a grounding resistance measuring instrument with a sealed structure includes a housing; a groove is formed in the middle of the upper surface of the housing; a measuring instrument body is disposed in the groove; a mounting base surrounds the outside of the measuring instrument body; a sealing ring is disposed in the mounting base, the depth of the sealing ring being lower than the horizontal height of the mounting base to form a mounting groove; a housing cover is hinged to one side of the housing; a sealing top plate is disposed on the side of the housing cover that is in closed contact with the housing; a mounting groove is disposed in the middle of the sealing top plate; a sealing strip is disposed in the mounting groove, the top edge of the sealing strip being higher than the horizontal position of the sealing top plate.
[0007] Preferably, a plurality of return springs are arranged in a ring at the bottom of the mounting base, each of the return springs contains a damper, and the side of the return springs away from their bottom wall is connected to the bottom of the sealing ring.
[0008] Preferably, a set of cavities are symmetrically opened on both sides of the upper surface of the box body. Each of the two cavities is provided with a mounting block. Each of the two mounting blocks is rotatably fitted with a first electric push rod. Each of the telescopic ends of the two first electric push rods is provided with a first mounting shaft. Each of the two sides of the box cover opposite to the box body is provided with a second mounting shaft. The first mounting shaft and the second mounting shaft are connected by the same connecting spring, and the connecting spring integrates a damper.
[0009] Preferably, a second electric push rod is provided on the end side of the cavity, and the telescopic end of the second electric push rod is connected to the side wall of the first electric push rod.
[0010] Preferably, a set of sealing buckles is symmetrically arranged on the side of the box cover away from the hinge, and a set of sealing grooves is symmetrically arranged on the outer side wall of the box body.
[0011] Preferably, the inner diameter of the sealing groove matches the outer diameter of the sealing buckle.
[0012] Preferably, the edge of the top of the sealing strip is radially tapered, and its outer diameter matches the size of the mounting groove.
[0013] Preferably, a rubber pad is provided at the bottom of the box.
[0014] Compared with the prior art, the embodiments of this application have the following main advantages:
[0015] Firstly, when the cover of this device is pushed against the housing and tightly closed, the precise engagement of the sealing buckle and the sealing groove, along with the tight contact between the sealing strip and the mounting groove, together constitute a highly efficient sealing system. This system not only effectively prevents the intrusion of external factors such as dust and moisture, providing a solid protective barrier for the internal measuring instrument body and related electronic components, but also ensures the accuracy and reliability of the measuring instrument in harsh environments. In addition, the synergistic effect of the sealing ring and the return spring further enhances the stability and durability of the seal, enabling the measuring instrument to maintain its optimal performance under various conditions.
[0016] Secondly, this device ensures the smoothness and slowness of the automatic opening and closing of the equipment box; this design not only improves the user experience, but also avoids potential damage to the measuring instrument caused by rapid or sudden actions; it ensures the smooth closing of the box cover, providing stable support and protection for the long-term use of the measuring instrument. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;
[0018] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;
[0019] Figure 3 This is a top view of the structure of this utility model;
[0020] Figure 4 This is a side view of the structure of this utility model;
[0021] Figure 5 This is a front sectional view of the structure of this utility model;
[0022] In the diagram: 1. Housing; 2. Detector body; 3. Mounting base; 4. Sealing ring; 5. Hinge; 6. Housing cover; 7. Sealing top plate; 8. Mounting groove; 9. Sealing strip; 10. Return spring; 11. Cavity; 12. Mounting block; 13. First electric push rod; 14. First mounting shaft; 15. Second mounting shaft; 16. Connecting spring; 17. Second electric push rod; 18. Sealing buckle; 19. Sealing groove; 20. Rubber pad. Detailed Implementation
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.
[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0025] This utility model embodiment provides a grounding resistance measuring instrument with a sealed structure, such as... Figure 1-5As shown, the device includes a housing 1; a groove is formed in the middle of the upper surface of the housing 1; a detector body 2 is disposed in the groove; a mounting base 3 surrounds the outside of the detector body 2; a sealing ring 4 is disposed in the mounting base 3, the depth of the sealing ring 4 being lower than the horizontal height of the mounting base 3 to form a mounting groove; a housing cover 6 is hinged to one side of the housing 1 via a hinge 5; a sealing top plate 7 is disposed on the side of the housing cover 6 that is in closed contact with the housing 1; a mounting groove 8 is disposed in the middle of the sealing top plate 7; a sealing strip 9 is disposed in the mounting groove 8, the top edge of the sealing strip 9 being higher than the horizontal position of the sealing top plate 7.
[0026] It should be noted that existing grounding resistance measuring instruments, due to their simple structure and reliance on a single sealing ring, suffer from poor sealing performance due to prolonged use and external environmental factors. This makes them ill-suited to complex and changing measurement environments, especially under harsh conditions where the sealing effect is significantly compromised. This solution addresses this issue by constructing a highly efficient sealing system and ensuring smooth and gradual operation, thereby comprehensively improving the reliability and durability of the measuring instrument. Specifically, the efficient sealing system effectively prevents the intrusion of external factors such as dust and moisture, providing a robust protective barrier for the internal measuring instrument body 2 and related electronic components, ensuring the accuracy and reliability of the measuring instrument in harsh environments. Simultaneously, the synergistic effect of the sealing ring 4 and the return spring 10 further enhances the stability and durability of the seal, enabling the measuring instrument to maintain its optimal performance under various conditions. Furthermore, the smooth and gradual design of the automatic opening and closing operation not only improves the user experience but also avoids potential damage to the measuring instrument caused by rapid or sudden actions, ensuring the smooth closing of the cover 6 and providing stable support and protection for the long-term use of the measuring instrument.
[0027] Specifically, in this embodiment, the solution mainly includes a housing 1; the housing 1 includes a groove located in the middle of its upper end face, the main function of which is to accommodate the detector body 2; the detector body 2 is firmly installed inside the groove by a mounting seat 3 on its outer side; inside the mounting seat 3, a sealing ring 4 is designed; the depth of the sealing ring 4 is intentionally set to be lower than the horizontal height of the mounting seat 3, thereby forming a mounting groove 8; this design aims to enhance the sealing performance between the detector body 2 and the housing 1, and ensure a tight connection between the two;
[0028] One side of the box body 1 is hinged to the box cover 6 via a hinge 5, allowing the box cover 6 to open or close flexibly. When the box cover 6 is closed to the box body 1, the sealing top plate 7 on the inner side of the box cover 6 will be in close contact with the mounting groove 8 on the upper surface of the box body 1. A mounting groove 8 is provided in the middle of the sealing top plate 7 for installing the sealing strip 9. The top edge of the sealing strip 9 is higher than the horizontal position of the sealing top plate 7.
[0029] This design ensures that when the cover 6 is closed, the sealing strip 9 can be tightly pressed into the mounting groove 8 of the housing 1, thus forming an effective sealing structure. This sealing structure effectively prevents external factors such as dust and moisture from entering the inside of the detector. In this way, the detector body 2 and related electronic components are fully protected and avoid damage caused by external environmental factors. Therefore, this design not only improves the reliability of the detector body 2, but also extends its service life.
[0030] In a further preferred embodiment of this utility model, such as Figure 1-4 As shown, a plurality of return springs 10 are arranged in a ring at the bottom of the mounting base 3. Each of the return springs 10 contains a damper. The side of each return spring 10 away from its bottom wall is connected to the bottom of the sealing ring 4.
[0031] In this embodiment, when the cover 6 is closed and pressure is applied, the sealing ring 4 will be squeezed and move downward, thereby compressing the return spring 10; at this time, the damper begins to play its role, which limits the instantaneous rebound of the return spring 10, so that the sealing ring 4 can gradually and stably fit onto the mounting groove 8 of the housing 1 to form a tight seal.
[0032] When the cover 6 needs to be opened, the external force will overcome the elasticity of the return spring 10, causing the sealing ring 4 to separate from the mounting groove 8. At this time, the damper will play its role again, which will slow down the rebound speed of the return spring 10, so that the sealing ring 4 can smoothly disengage from the contact, avoiding noise and possible damage caused by rapid rebound.
[0033] In a further preferred embodiment of this utility model, such as Figure 1-4 As shown, a set of cavities 11 are symmetrically opened on both sides of the upper surface of the box body 1. Each of the two cavities 11 is provided with a mounting block 12. Each of the two mounting blocks 12 is rotatably fitted with a first electric push rod 13. Each of the two first electric push rods 13 is provided with a first mounting shaft 14 on its telescopic end. Each of the two sides of the box cover 6 opposite to the box body 1 is provided with a second mounting shaft 15. The same connecting spring 16 is provided between the corresponding first mounting shaft 14 and second mounting shaft 15. The connecting spring 16 integrates a damper.
[0034] In this embodiment, when the lid 6 needs to be opened, the telescopic end of the first electric push rod 13 extends, pushing the first mounting shaft 14 outward. Due to the presence of the connecting spring 16 and the damper, this process is smooth and controlled. The connecting spring 16 provides the necessary elasticity and cushioning, while the damper limits the instantaneous rebound of the spring, ensuring the stability and slowness of the lid 6 during opening. When the lid 6 is fully open, the first electric push rod 13 remains extended, while the connecting spring 16 and the damper are in a stretched state, providing stable support for the lid 6. Conversely, when the lid 6 needs to be closed, the telescopic end of the first electric push rod 13 retracts, pulling the first mounting shaft 14 inward. Similarly, the connecting spring 16 and the damper work together to ensure the smoothness and slowness of the lid 6 during closing.
[0035] In a further preferred embodiment of this utility model, such as Figure 1-5 As shown, a second electric push rod 17 is provided on the end side of the cavity 11, and the telescopic end of the second electric push rod 17 is connected to the side wall of the first electric push rod 13.
[0036] In this embodiment, when it is necessary to open the box cover 6, the second electric push rod 17 is activated first, and its telescopic end pushes the first electric push rod 13, causing the first electric push rod 13 and the first mounting shaft 14 on it to move to the predetermined opening position. Subsequently, the first electric push rod 13 is activated, and its telescopic end extends further, pushing the first mounting shaft 14 to move outward. Through the action of the connecting spring 16 and the damper, the box cover 6 is opened smoothly.
[0037] In a further preferred embodiment of this utility model, such as Figure 1-2 As shown, a set of sealing buckles 18 are symmetrically arranged on the side of the box cover 6 away from the hinge 5, and a set of sealing grooves 19 are symmetrically arranged on the outer side wall of the box body 1.
[0038] In this embodiment, when the cover 6 is pushed toward the housing 1 to close, the sealing buckles 18 move along the direction of the housing 1 until they engage with the sealing grooves 19, forming a tight fit. This tight fit not only helps prevent external factors such as dust and moisture from entering the measuring instrument, but also increases the connection strength between the cover 6 and the housing 1, making the cover 6 more stable in the closed state.
[0039] In a further preferred embodiment of this utility model, such as Figure 1-2 As shown, the inner diameter of the sealing groove 19 matches the outer diameter of the sealing buckle 18.
[0040] In this embodiment, this tight fit is crucial for the sealing performance of the instrument body 2. It not only effectively prevents external factors such as dust and moisture from entering the instrument through the gap between the cover 6 and the housing 1, thus protecting the internal instrument body 2 and related electronic components from damage, but also enhances the connection strength between the cover 6 and the housing 1, making the entire instrument body 2 more stable and reliable during transportation and use.
[0041] In a further preferred embodiment of this utility model, such as Figure 1 As shown, the edge of the top of the sealing strip 9 is radially tapered, and its outer diameter matches the size of the mounting groove 8.
[0042] In this embodiment, the radially tapering design of the sealing strip 9 also allows the cover 6 to slide more smoothly and fit onto the box 1 during the closing process, reducing resistance and noise when closing. This design not only improves the ease of use of the detector body 2, but also provides users with a more comfortable and quiet user experience.
[0043] In a further preferred embodiment of this utility model, such as Figure 1-2 As shown, a rubber pad 20 is provided at the bottom of the box 1.
[0044] In this embodiment, the design of the rubber pad 20 makes the measuring instrument more stable when placed. Even on unstable ground or at an inclined angle, the rubber pad 20 can provide sufficient support to prevent the measuring instrument from tipping over or sliding, ensuring its accuracy and safety during operation.
[0045] Working principle: When this device is in use, when it is necessary to close the cover 6 of the grounding resistance measuring instrument, the cover 6 is pushed towards the box 1; during this process, the sealing buckles 18 will move along the direction of the box 1 until they precisely engage with the sealing grooves 19 to form a tight fit; this tight fit not only effectively prevents external factors such as dust and moisture from entering the measuring instrument through the gap between the cover 6 and the box 1, protecting the internal measuring instrument body 2 and related electronic components, but also enhances the connection strength between the cover 6 and the box 1, making the entire measuring instrument more stable and reliable during transportation and use;
[0046] The design of the housing 1 takes into account the installation requirements of the instrument body 2; a groove is provided in the middle of the upper end face of the housing 1 to accommodate the instrument body 2; the instrument body 2 is firmly installed in the groove by the mounting base 3 on its outer side; inside the mounting base 3, a sealing ring 4 is designed, the depth of which is deliberately set to be lower than the horizontal height of the mounting base 3, thus forming a mounting groove 8; this design aims to enhance the sealing performance between the instrument body 2 and the housing 1.
[0047] The lid 6 is hinged to the body 1 via a hinge 5, allowing it to open and close flexibly. When the lid 6 is closed to the body 1, the sealing top plate 7 on the inner side of the lid 6 will be in close contact with the mounting groove 8 on the upper surface of the body 1. A mounting groove 8 is provided in the middle of the sealing top plate 7 for installing a sealing strip 9. The top edge of the sealing strip 9 is higher than the horizontal position of the sealing top plate 7, ensuring that when the lid 6 is closed, the sealing strip 9 can be tightly pressed into the mounting groove 8 of the body 1, forming an effective sealing structure.
[0048] During the process of closing the cover 6 and applying pressure, the sealing ring 4 will be squeezed and move downward, thereby compressing the return spring 10; at this time, the damper inside the return spring 10 begins to play its role, limiting the instantaneous rebound of the return spring 10, so that the sealing ring 4 can gradually and stably fit onto the mounting groove 8 of the housing 1 to form a tight seal.
[0049] If the lid 6 needs to be opened, the operation is equally smooth and controlled. First, the second electric push rod 17 is activated, and its telescopic end pushes the first electric push rod 13, causing the first electric push rod 13 and its first mounting shaft 14 to move to the predetermined opening position. Subsequently, the first electric push rod 13 is activated, and its telescopic end extends further, pushing the first mounting shaft 14 outward. During this process, the connecting spring 16 and the damper work together to provide the necessary elasticity and buffering, limiting the instantaneous rebound of the connecting spring 16 and ensuring the stability and slowness of the lid 6 during opening. When the lid 6 is fully opened, the first electric push rod 13 remains extended, while the connecting spring 16 and the damper are in a stretched state, providing a guarantee for the stable support of the lid 6.
[0050] Conversely, when the lid 6 needs to be closed, the telescopic end of the first electric push rod 13 will retract, pulling the first mounting shaft 14 inward; similarly, the connecting spring 16 and the damper will work together to ensure the smoothness and slowness of the lid 6 during the closing process.
[0051] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.
[0052] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units described above may be implemented in other ways in practice. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; indirect coupling or communication connections between devices or units may be telecommunications or other forms.
[0053] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0054] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.
Claims
1. A grounding resistance measuring instrument with a sealed structure, characterized in that, Include: Box (1); The middle of the upper end face of the box (1) is provided with a groove; The detection instrument body (2) is arranged in the groove; The mounting seat (3) is arranged outside the detection instrument body (2); The mounting seat (3) is provided with a sealing rubber ring (4), and the depth of the sealing rubber ring (4) is lower than the horizontal height of the mounting seat (3) to form a mounting groove (8) body; The side of the box (1) is hinged with the box cover (6) through the hinge (5); The side of the box cover (6) in close contact with the box (1) is provided with a sealing top plate (7); The mounting groove (8) is arranged in the middle of the sealing top plate (7); The mounting groove (8) is provided with a sealing rubber strip (9), and the top edge of the sealing rubber strip (9) is higher than the horizontal position of the sealing top plate (7).
2. The ground resistance measuring instrument having a sealed structure according to claim 1, wherein The bottom of the mounting seat (3) is annularly provided with a plurality of reset springs (10), a plurality of dampers are arranged in the reset springs (10), and the side away from the bottom wall of the reset spring (10) is connected with the bottom position of the sealing rubber ring (4).
3. The ground resistance measuring instrument having a sealed structure according to claim 1, wherein A group of cavities (11) are symmetrically arranged on both sides of the upper surface of the box (1), two mounting blocks (12) are arranged in the two cavities (11), two first electric push rods (13) are rotatably connected to the two mounting blocks (12), first mounting shafts (14) are arranged on the telescopic ends of the two first electric push rods (13), second mounting shafts (15) are arranged on the opposite sides of the box cover (6) and the box (1), a connecting spring (16) is arranged between the corresponding first mounting shaft (14) and second mounting shaft (15), and a damper is integrated in the connecting spring (16).
4. The ground resistance measuring instrument having a sealed structure according to claim 3, wherein The end side of the cavity (11) is provided with a second electric push rod (17), and the telescopic end of the second electric push rod (17) is connected with the side wall of the first electric push rod (13).
5. The ground resistance measuring instrument having a sealed structure according to claim 3, wherein A group of sealing buckles (18) are symmetrically arranged on the side of the box cover (6) away from the hinge (5), and a group of sealing clamping grooves (19) are symmetrically arranged on the outer side wall of the box (1).
6. The grounding resistance measuring instrument with sealing structure of claim 5, wherein The inner diameter size of the sealing clamping groove (19) matches the outer diameter size of the sealing buckle (18).
7. The grounding resistance measuring instrument with sealing structure of claim 1, wherein The edge of the top end of the sealing rubber strip (9) is radially tapered, and the outer diameter matches the size of the mounting groove (8) body.
8. The ground resistance measuring instrument having a sealed structure according to claim 5, wherein The bottom of the box (1) is provided with a rubber pad (20).