CN213398726U - Hand-held type ground resistance detector - Google Patents
Hand-held type ground resistance detector Download PDFInfo
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- CN213398726U CN213398726U CN202020484420.2U CN202020484420U CN213398726U CN 213398726 U CN213398726 U CN 213398726U CN 202020484420 U CN202020484420 U CN 202020484420U CN 213398726 U CN213398726 U CN 213398726U
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Abstract
The utility model relates to a hand-held ground resistance detector, which comprises a shell, a minimally invasive detection drill bit and a hand-held mechanism, wherein the minimally invasive detection drill bit is used for carrying out minimally invasive treatment on the surface of a detected object and measuring the ground resistance of the detected object during detection; the minimally invasive detection drill bit is arranged at the top of the shell; the handheld mechanism is arranged at the lower part of the shell. The detector can be carried out short-term test by handheld operation, is showing when improving its convenience of use, guarantees the security of operation, in addition, is showing the accuracy that improves test data.
Description
Technical Field
The utility model relates to a hand-held type ground resistance detector.
Background
The thunder disaster is a serious natural disaster, and if the thunder disaster is not effectively protected, the consequences generated by the thunder disaster can not be imagined. Therefore, lightning protection devices are generally installed on tall objects such as buildings. The ground resistance detector is a common instrument for detecting and measuring ground resistance, and in order to ensure the normal operation of the lightning protection device, the ground resistance detector is required to be used for measuring the ground resistance of the lightning protection device regularly. In addition, the grounding resistance detector is also an indispensable tool for wild electrical safety inspection and grounding engineering completion acceptance, can be used for measuring the grounding resistance of various devices and measuring the low-resistance conductive resistance value, is particularly suitable for laboratories and automatic detection lines with high requirements due to high measurement precision, high speed and convenient use, and is widely applied to the grounding resistance measurement of electric power, telecommunication, meteorology, oil fields, buildings and industrial electrical equipment.
However, the ground resistance detector in the prior art has large connecting resistance, is inconvenient to use and cannot be held by hands for rapid detection, and in addition, dirt such as rust can be generated on the surface of an object to be detected installed in the open air along with the accumulation of time, so that the probe of the ground resistance detector cannot be in direct contact with the object to be detected, the accuracy of measurement of the ground resistance detector is seriously affected, and the actual ground resistance value of the object to be detected cannot be obtained.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the technical problem who exists among the prior art, provide a hand-held type ground resistance detector, solve the detector among the prior art and use inconvenient and can't hand the problem that the accuracy that carries out short-term test and test data is low.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a hand-held grounding resistance detector comprises a shell, a minimally invasive detection drill bit and a hand-held mechanism, wherein the minimally invasive detection drill bit is used for performing minimally invasive treatment on the surface of a detected object and measuring the grounding resistance of the detected object during detection; the minimally invasive detection drill bit is arranged at the top of the shell; the handheld mechanism is arranged at the lower part of the shell.
The utility model has the advantages that: the detector can be carried out short-term test by handheld operation, is showing when improving its convenience of use, guarantees the security of operation, in addition, improves test data's accuracy.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the hand-held mechanism is a handle, and a plurality of anti-skid parts are arranged on the hand-held mechanism.
Further, the anti-slip part comprises a groove and/or a protrusion; the handle is sleeved with insulating antiskid rubber.
Further, a limiting plate is sleeved at one end, close to the minimally invasive detection drill bit, of the handle; the limiting plate is made of an insulating material; the limiting plate is of an elliptical ring structure.
Furthermore, an anti-static rubber protection sheet is arranged on the side wall of the minimally invasive detection drill bit and covers the side wall of the minimally invasive detection drill bit.
Furthermore, a detection probe used for assisting the minimally invasive detection drill in measuring and protecting the minimally invasive detection drill is arranged at the top of the shell, and the minimally invasive detection drill penetrates through the detection probe.
Furthermore, a moving structure for enabling the detection probe to move up and down relative to the shell is arranged at the lower part of the detection probe.
Further, the detection probe is in threaded connection with the shell; the movable structure is an external thread processed on the outer wall of the detection probe, an internal thread is arranged on the inner wall of the top of the shell, and the internal thread is matched with the external thread.
Further, the moving structure is a constant force spring sleeved on the outer wall of the detection probe, one end of the constant force spring is fixed on the bottom surface of the upper portion of the detection probe, and the other end of the constant force spring is fixed on the top surface of the top of the shell.
Furthermore, a small direct current motor and a detection battery which are used for driving the minimally invasive detection drill bit to rotate are arranged in the shell; the middle part of the shell is provided with a display screen for displaying a measured value; the bottom of the shell is provided with a detection line connecting port used for connecting a test line and a charging port used for charging a battery for detection.
The anti-skid device has the advantages that the anti-skid effect and the insulation effect of the handle are improved, so that the safety and the convenience of the detector are guaranteed; the accuracy, the use convenience and the service life of the test data of the detector are further improved; the anti-static rubber protection sheet is arranged for carrying out static protection, so that the accuracy of the test data is improved; the detector is simple to operate, realizes quick test, can quickly pierce dirt, rust, paint and the like on the surface layer of the detection point, keeps effective electrical connection with the detection point, and simultaneously ensures that the physical damage at the detection point is very small through minimally invasive treatment; and a display screen connected with the test line is newly added to synchronously display test data, so that field detection personnel can conveniently master the information of the detection points in time.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of a limiting plate according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating the cooperation between the detection probe and the housing according to the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a detection probe according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a CMOS time base integrated circuit according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a shell, 2, a detection probe, 21, a mobile structure, 3, a minimally invasive detection drill bit, 31, an anti-static rubber protection sheet, 4, a handheld mechanism, 41, an anti-skid part, 5, a limiting plate, 6, a display screen, 7, a detection line connection port, 8 and a charging port.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, the handheld ground resistance detector according to this embodiment includes a housing 1, a minimally invasive detection drill 3 for performing minimally invasive treatment on a surface of a measured object and measuring a ground resistance of the measured object during detection, and a handheld mechanism 4, that is, the minimally invasive detection drill 3 has two functions: the probe is used as a minimally invasive tool for carrying out minimally invasive treatment on the surface of a measured object during detection so as to improve the accuracy of test data, and is also used as a probe part of the detector, and the handheld mechanism 4 is arranged so as to facilitate handheld operation of the detector, so that the use convenience of the detector is obviously improved, and further, the rapid detection is realized; the minimally invasive detection drill bit 3 is arranged at the top of the shell 1, the handheld mechanism 4 is arranged at the lower part of the shell 1, and the handheld mechanism 4 is arranged at one end far away from the minimally invasive detection drill bit 3, so that the use safety and convenience of the detector are improved; the housing 1 is made of an insulating material to ensure the safety of the detector.
As shown in fig. 1, the handheld mechanism 4 is a handle, and a plurality of anti-slip portions 41 are disposed on the handheld mechanism, where the anti-slip portions 41 include grooves and/or protrusions, in this embodiment, the anti-slip portions 41 are grooves, and the grooves are symmetrically distributed to increase the roughness of the surface of the handle, so as to improve the friction between the handle and the hand of the operator, thereby significantly improving the convenience and practicability of the handle and the detector, and preventing the operator from slipping to cause misoperation or damage to the detector during use, for example, the detector falls onto the ground. Insulating anti-skidding rubber can also be overlapped on the handle to further improve the security and the convenience of use are guaranteed to the antiskid effect and the insulating effect of handle.
As shown in fig. 1, a limiting plate 5 is sleeved at one end of the handle close to the minimally invasive detection drill bit 3, so that the limiting function is achieved on the holding position of an operator, and the hand is further prevented from sliding upwards; the limiting plate 5 is made of an insulating material, so that the use safety of the detector is further ensured; as shown in fig. 2, the limiting plate 5 of the present embodiment is an elliptical ring structure, an inner sidewall of the elliptical ring structure is connected to the housing 1 in a snap-fit or embedded manner, the limiting plate 5 may also be another structure, for example, the limiting plate 5 is a structure with a plurality of rectangular plates or a structure with a special-shaped plate.
As shown in fig. 1, an anti-static rubber protection sheet 31 is arranged on the side wall of the minimally invasive detection drill bit 3, the anti-static rubber protection sheet 31 covers the side wall of the minimally invasive detection drill bit 3, and the anti-static rubber protection sheet 31 plays a role in static protection to eliminate static hazard and avoid interference of static electricity on the minimally invasive detection drill bit 3.
As shown in fig. 1, 3 and 4, a detection probe 2 for assisting the minimally invasive detection drill 3 in measuring and protecting the minimally invasive detection drill 3 is disposed at the top of the housing 1, the minimally invasive detection drill 3 passes through the detection probe 2, a moving structure 21 for moving the detection probe 2 up and down relative to the housing 1 is disposed at the lower portion of the detection probe 2, and when the probe is not in operation, that is, when the minimally invasive detection drill 3 is not needed, the detection probe 2 is moved up relative to the top of the housing 1, so that the minimally invasive detection drill 3 is located inside the detection probe 2 to protect the minimally invasive detection drill 3, thereby improving the safety of the probe in use and preventing the minimally invasive detection drill 3 from being inadvertently triggered; when the minimally invasive detection drill bit 3 needs to be used, the detection probe 2 is moved downwards relative to the top of the shell 1, so that the minimally invasive detection drill bit 3 is exposed out of the top of the detection probe 2, normal work of the minimally invasive detection drill bit 3 is guaranteed, and meanwhile, the detection probe 2 can be aligned to a test point during measurement to assist the minimally invasive detection drill bit 3 in positioning.
In the embodiment, the detection probe 2 is in threaded connection with the shell 1; the movable structure 21 is an external thread processed on the outer wall of the detection probe 2, an internal thread is arranged on the inner wall of the top of the shell 1, and the internal thread is matched with the external thread to achieve the purpose that the detection probe 2 moves up and down relative to the shell 1.
In another embodiment, the moving structure 21 is a constant force spring sleeved on the outer wall of the detection probe 2, one end of the constant force spring is fixed on the bottom surface of the upper part of the detection probe 2, the other end of the constant force spring is fixed on the top surface of the top of the housing 1, and the purpose of moving the detection probe 2 up and down relative to the housing 1 is achieved through the elastic force generated by the constant force spring.
In this embodiment, a small-sized dc motor for driving the minimally invasive detection drill 3 to rotate and a detection battery arranged at the bottom inside the housing 1 are arranged inside the housing 1, the small-sized dc motor is adopted to reduce the volume and weight of the detector and improve the convenience of use of the detector, the detection battery adopts a rechargeable 5V lithium battery, and a special charger is provided to improve the service life and economy of the detector; the middle part of the shell 1 is provided with a display screen 6 mounting groove, a display screen 6 for displaying a measured numerical value is mounted in the display screen 6 mounting groove, the display screen 6 is a liquid crystal display screen, the measured numerical value is displayed clearly and visually, the display screen 6 is connected with a test wire, the other end of the test wire is connected with a grounding resistance tester, the display screen 6 can synchronously display test data on the tester through the test wire, and therefore field detection personnel (operators) can master information of a detection point in time; the bottom of the shell 1 is provided with a detection line connecting port 7 for connecting a test line and a charging port 8 for charging a battery for detection, so that charging is facilitated, a special charger is inserted into a 220V power grid socket for charging, a red indicator lamp of the charger is on to indicate that charging is in progress, and a green indicator lamp is on to indicate that charging is finished.
The inside theory of operation of detector is prior art, is not the key point of the utility model, illustrates here: the minimally invasive detection drill bit 3 is arranged at the top end of a motor shaft of a small direct current motor; a motor pressure spring, a microswitch pressure spring and a CMOS time-base integrated circuit are arranged between the small direct current motor and the battery for detection, and the motor pressure spring and the microswitch pressure spring are positioned between the small direct current motor and the CMOS time-base integrated circuit; the circuit diagram of the CMOS time base integrated circuit is shown in fig. 5; a microswitch is arranged outside the CMOS time-base integrated circuit, a microswitch pressure spring is contacted with the microswitch, and a motor pressure spring surrounds the microswitch pressure spring and the microswitch; the motor pressure spring is contacted with the bottom end of a motor shaft of the small direct current motor and a packaging shell of the CMOS time-base integrated circuit;
when the minimally invasive detection drill bit 3 at the top end of the motor shaft contacts and presses a test point on a tested object, the small-sized direct current motor starts to contract towards the lower part of the shell 1 and compresses the microswitch pressure spring, then the microswitch pressure spring touches (collides) the microswitch, the microswitch is closed to trigger the CMOS time-base integrated circuit to work, wherein the COMS field effect tube is conducted to drive the small-sized direct current motor to rotate, and the minimally invasive detection drill bit 3 at the top end of the motor shaft carries out minimally invasive treatment and rapidly pierces an insulating layer on the surface of the test point so as to be effectively and electrically connected with the test point.
The working process of the detector is as follows:
when the moving structure 21 is an external thread: before the test, the detection probe 2 is rotated to move downwards relative to the top of the shell 1 until the minimally invasive detection drill bit 3 is exposed, then the detector is held by hands to align the minimally invasive detection drill bit 3 to a test point on a measured object to be pressed with force slightly, the detector can quickly pierce dirt, rust, paint and the like on the surface layer of the test point and keep effective electrical connection with the test point, meanwhile, the minimally invasive treatment causes very little physical damage to the test point, and after the detector finishes (2 seconds) measurement, the display screen 6 displays a measurement value.
When the moving structure 21 is a constant force spring: the detector is directly held by hands, the detection probe 2 is aligned to a test point on a measured object and is pressed by a little force, and after the detector finishes measuring (2 seconds), the display screen 6 displays a measurement value.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A hand-held grounding resistance detector is characterized by comprising a shell (1), a minimally invasive detection drill bit (3) and a hand-held mechanism (4), wherein the minimally invasive detection drill bit is used for performing minimally invasive treatment on the surface of a measured object and measuring the grounding resistance of the measured object during detection; the minimally invasive detection drill bit (3) is arranged at the top of the shell (1); the handheld mechanism (4) is arranged at the lower part of the shell (1).
2. A hand-held ground resistance probe according to claim 1, characterized in that the hand-held mechanism (4) is a handle on which a plurality of anti-slip parts (41) are arranged.
3. A hand-held ground resistance probe according to claim 2, characterized in that the anti-slip part (41) comprises a groove and/or a protrusion; the handle is sleeved with insulating antiskid rubber.
4. The hand-held ground resistance probe according to claim 2, wherein a limiting plate (5) is sleeved on one end of the handle close to the minimally invasive detection drill bit (3); the limiting plate (5) is made of an insulating material; the limiting plate (5) is of an elliptical ring structure.
5. The hand-held ground resistance detector according to claim 1, characterized in that an anti-static rubber protection sheet (31) is disposed on the side wall of the minimally invasive detection drill (3), and the anti-static rubber protection sheet (31) covers the side wall of the minimally invasive detection drill (3).
6. The hand-held ground resistance detector according to claim 1, characterized in that a detection probe (2) for assisting the minimally invasive detection drill (3) in measuring and protecting the minimally invasive detection drill (3) is arranged on the top of the housing (1), and the minimally invasive detection drill (3) passes through the detection probe (2).
7. Hand-held ground resistance probe according to claim 6, characterized in that the lower part of the detecting probe (2) is provided with a moving structure (21) for moving the detecting probe (2) up and down relative to the housing (1).
8. The hand-held ground resistance probe according to claim 7, characterized in that the detecting probe (2) is screwed with the housing (1); the movable structure (21) is an external thread processed on the outer wall of the detection probe (2), an internal thread is arranged on the inner wall of the top of the shell (1), and the internal thread is matched with the external thread.
9. The hand-held ground resistance detector according to claim 7, wherein the moving structure (21) is a constant force spring sleeved on the outer wall of the detecting probe (2), one end of the constant force spring is fixed on the bottom surface of the upper part of the detecting probe (2), and the other end is fixed on the top surface of the top of the casing (1).
10. The hand-held ground resistance detector according to claim 1, characterized in that a small DC motor and a detection battery for driving the minimally invasive detection drill bit (3) to rotate are arranged in the shell (1); a display screen (6) for displaying a measured value is arranged in the middle of the shell (1); the bottom of the shell (1) is provided with a detection line connecting port (7) for connecting a test line and a charging port (8) for charging a battery for detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020484420.2U CN213398726U (en) | 2020-04-03 | 2020-04-03 | Hand-held type ground resistance detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020484420.2U CN213398726U (en) | 2020-04-03 | 2020-04-03 | Hand-held type ground resistance detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213398726U true CN213398726U (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020484420.2U Active CN213398726U (en) | 2020-04-03 | 2020-04-03 | Hand-held type ground resistance detector |
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| Country | Link |
|---|---|
| CN (1) | CN213398726U (en) |
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2020
- 2020-04-03 CN CN202020484420.2U patent/CN213398726U/en active Active
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