Fireproof coating thickness measuring tool

Abstract

A fireproof coating thickness measuring tool provided by the present invention comprises a vertical rod, the two sides of the lower end of the vertical rod are fixedly connected with horizontal supporting rods, the middle part of the vertical rod is provided with a sliding block along the vertical direction, the lower end of the sliding block is provided with a probe in an extending manner, and the sliding block is internally provided with a battery, a triode and an LED. The positive electrode of the battery, the probe and the base electrode of the triode are electrically connected, the positive electrode of the battery is electrically connected with the collector electrode of the triode, the emitter electrode of the triode is connected with the negative electrode of the battery, the LED is connected in series with the circuit, a groove is formed in the upper part of the sliding block, and one inner wall of the groove is an inclined surface; a U-shaped fastener is horizontally and movably arranged in the groove, one end of the fastener is in sliding fit with the inclined face, and the other end of the fastener is lapped on the surface of the sliding block. The device is easy to use, and meanwhile, the LED is arranged for indication, so that the measurement accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coating thickness measurement, in particular to a fire retardant coating thickness measurement tool. Background Art

[0002] Steel structure engineering is a structure made mainly of steel and is one of the main types of building structures. However, due to the influence of high temperature, the mechanical properties of steel structure change greatly. Therefore, during the construction of steel structure, it is necessary to carry out fireproof spraying treatment on the steel structure according to the construction requirements.

[0003] In order to ensure that the coating thickness meets the construction requirements, the coating thickness needs to be measured. Usually, a needle is used to puncture the coating, and the depth of the needle immersion in the coating is measured to obtain the coating thickness. This measurement method is relatively crude and has a large measurement error. Summary of the invention

[0004] In order to solve the above problems, the present invention discloses a fire retardant coating thickness measuring tool, comprising a vertical rod, both sides of the lower end of the vertical rod are fixedly connected to horizontal support rods, a slider is arranged in the middle of the vertical rod along the vertical direction, and a probe is extended from the lower end of the slider. This tool is used to measure the thickness of the fire retardant coating, the probe pierces the fire retardant coating and contacts the steel structure, and the thickness of the fire retardant coating is determined by the position of the slider.

[0005] The slider is provided with a battery, a transistor, and an LED inside. The positive electrode of the battery, the probe, and the base of the transistor are electrically connected. The positive electrode of the battery and the collector of the transistor are electrically connected. The emitter of the transistor is connected to the negative electrode of the battery, and the LED is connected in series on the circuit. When the probe contacts the steel structure, the base potential of the transistor cannot conduct the emitter and the collector, and the LED is off. Whether the probe contacts the steel structure is determined by the on and off of the LED, which is conducive to improving the accuracy of the coating thickness measurement. If there is no electrical conductivity between the steel structure and the probe, this function can be ignored and can be distinguished only by the puncture force of the probe.

[0006] The upper part of the slider is provided with a groove, and one of the inner walls of the groove is an inclined surface. A fastener is horizontally arranged in the groove. The fastener is U-shaped, and one end of the fastener is slidably matched with the inclined surface, and the other end is placed on the surface of the slider. The fastener is used to fix the slider and facilitate the removal of the reading.

[0007] Preferably, a resistor is connected in series between the positive electrode of the battery and the base of the transistor, and the base of the transistor and the probe are electrically connected to the same side of the resistor. The resistor is used to limit current and reduce energy loss.

[0008] Preferably, the probe is arranged through the slider, and a fixing screw is threadedly connected to the slider, and the end of the fixing screw abuts against the probe to fix the probe. The relative position between the probe and the slider can be adjusted by rotating the fixing screw, that is, the probe position can be zeroed.

[0009] Preferably, the side wall of the vertical rod is provided with scales along the vertical direction for reading.

[0010] Preferably, a spring is provided at the upper end of the slide block, and the upper end of the spring abuts against the upper part of the vertical rod. Only under the action of the spring, the slide block slides along the deformation of the spring, which is conducive to single-handed measurement.

[0011] Preferably, a receiving groove is provided on one side of the upper part of the vertical rod, and an auxiliary rod is provided in the receiving groove, and a push block is fixedly connected to the lower part of the auxiliary rod, and the push block is slidably matched with the side wall of the vertical rod. In order to reduce the wear of the probe when puncturing the coating, the auxiliary rod can be used first, and a hole can be punctured in the coating through the auxiliary rod, and then the probe can be used to penetrate through the hole.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. A vertical rod, a slider, a horizontal support rod and a probe are provided to ensure that the probe can be vertically inserted into the coating, and a spring and a fastener are provided to fix the slider, so that it is convenient to remove the tool for reading. From the above structure, the tool is easy to use and can ensure the accuracy of measurement.

[0014] 2. An LED indicator is provided to determine whether the probe is in contact with the steel structure, thereby avoiding excessive force on the probe or failure to penetrate the coating, resulting in inaccurate measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the slider of the present invention;

[0017] Figure 3 It is a cross-sectional schematic diagram of a fastener of the present invention;

[0018] Figure 4 It is a three-dimensional schematic diagram of the auxiliary rod of the present invention;

[0019] Figure 5 Schematic diagram of the LED driving circuit of the present invention.

[0020] List of reference numerals:

[0021] 1. Horizontal support rod; 2. Probe; 3. Vertical rod; 4. Slider; 5. Scale; 6. Spring; 7. Push block; 8. Fixing screw; 9. LED; 10. Fastener; 11. Inclined surface; 12. Auxiliary rod; 13. Transistor; 14. Resistor; 15. Battery. DETAILED DESCRIPTION

[0022] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Example

[0023] like Figure 1 As shown, a fire retardant coating thickness measuring tool includes a vertical rod 3, and horizontal support rods 1 are fixedly connected to both sides of the lower end of the vertical rod 3. The vertical rod 3 and the horizontal support rod 1 form a "T"-shaped structure. During measurement, the horizontal support rod 1 is attached to the surface of the coating to ensure that the vertical rod 3 is perpendicular to the coating surface, thereby improving the measurement accuracy. A slider 4 is provided in the middle of the vertical rod 3 along the vertical direction, and a probe 2 is extended from the lower end of the slider 4, that is, the slider 4 can slide along the length direction of the vertical rod 3. When the slider 4 slides, it is realized whether the probe 2 extends out from the vertical rod 3. During measurement, the probe 2 punctures the coating, and after the end of the probe 2 contacts the steel structure, the extended length of the probe 2 is obtained, thereby obtaining the thickness of the coating.

[0024] Furthermore, the vertical rod 3 is provided with a “T”-shaped groove in the length direction, and the cross-sectional shape of the slider 4 matches the “T”-shaped groove. Through this matching mode, it is ensured that the slider 4 slides stably on the vertical rod 3.

[0025] like Figure 5 As shown, a battery 15, a transistor 13, and an LED 9 are arranged inside the slider 4. The LED 9 is used to display whether the probe 2 is in contact with the steel structure. The positive electrode of the battery 15, the probe 2, and the base of the transistor 13 are electrically connected. Here, the probe 2 is not in contact with the steel structure. The base of the transistor 13 is at a high potential, that is, the transistor 13 is in a conductive state. After the probe 2 is connected to the steel structure, the base of the transistor 13 is conductive to the earth, that is, it is at a low potential, and the transistor 13 is in a non-conductive state. The positive electrode of the battery 15 is electrically connected to the collector of the transistor 13, and the emitter of the transistor 13 is connected to the negative electrode of the battery 15, and the LED 9 is connected in series to its circuit. When the transistor 13 is in a conductive state, the LED 9 is in a lit state. When the transistor 13 is in a non-conductive state, the LED 9 is in an extinguished state. When the LED 9 is in an extinguished state, the probe 2 is in contact with the steel structure.

[0026] Furthermore, a switch is provided at the positive pole of the battery 15, and the above function is enabled by turning on the switch. In addition, if the surface of the steel structure is sprayed with primer, etc., so that there is no electrical conduction between the steel structure and the probe 2, the function will not work.

[0027] Combination Figure 2 and Figure 3 As shown, a groove is provided on the upper part of the slider 4, and the groove is arranged along the horizontal direction, and one of the inner walls of the groove is an inclined surface 11. A fastener 10 is horizontally movably arranged in the groove, and the fastener 10 is U-shaped, and one end thereof slides with the inclined surface 11, and the other end rests on the surface of the slider 4, that is, when the fastener 10 slides horizontally, one end can slide to the surface of the vertical rod 3, and at the same time, the end of the other end slides on the inclined surface 11. Sliding on the inclined surface 11 causes the fastener 10 to deform from a U shape to a V shape. At this time, the two ends of the fastener 10 respectively generate clamping forces on the surface of the vertical rod 3 and the inclined surface 11, thereby fixing the slider 4 on the vertical rod 3. At the same time, an anti-slip protrusion is provided on the surface of the fastener 10, which is convenient for sliding the fastener 10. The use of the fastener 10 makes it convenient to remove the tool for reading and recording after fixing the slider 4.

[0028] like Figure 5 As shown, a resistor 14 is connected in series between the positive electrode of the battery 15 and the base circuit of the transistor 13, and the base of the transistor 13 and the probe 2 are electrically connected to the same side of the resistor 14. The resistor 14 is used for current limiting. Here, the transistor 13 is turned on only by providing a high potential at the base. If it is directly electrically connected to the positive electrode of the battery 13, the probe 2 is in contact with the steel structure, that is, the positive electrode of the battery 15 is directly grounded, consuming electricity.

[0029] like Figure 2 As shown, the probe 2 is arranged through the slider 4, that is, a through hole is arranged on the slider 4, and the probe 2 can adjust its position up and down in the through hole. A fixing screw 8 is threadedly connected to the slider 4, and the end of the fixing screw 8 abuts against the probe 2 and fixes the probe 2. When the tool needs to be zeroed, the fixing screw 8 is loosened to set the position between the probe 2 and the slider 4, that is, the zeroing process is performed, and then the fixing screw 8 is tightened to complete the zeroing process to ensure the accuracy of the measurement.

[0030] like Figure 1 As shown, the side wall of the vertical rod 3 is provided with scales 5 along the vertical direction for reading.

[0031] A spring 6 is provided at the upper end of the slider 4, and the upper end of the spring 6 is against the upper part of the vertical rod 3. The spring 6 is arranged in the "T"-shaped groove, and the slider 4 maintains a downward sliding tendency only under the action of the spring 6. During measurement, by holding the vertical rod 3 and vertically inserting the probe 2 into the coating, if the probe 2 contacts the steel structure, the spring 6 can play a buffering role. At the same time, the use of the spring 6 can realize the one-handed operation of the tool.

[0032] Combination Figure 1 and Figure 4 As shown, a receiving groove is provided on one side of the upper part of the vertical rod 3, and an auxiliary rod 12 is provided in the receiving groove, and a push block 7 is fixedly connected to the lower part of the auxiliary rod 12, and the push block 7 is slidably fitted with the side wall of the vertical rod 3. The surface of the push block 7 is provided with an anti-slip protrusion, and the auxiliary rod 12 can be sent out of the receiving groove by sliding the push block 7. The use of the auxiliary rod 12 reduces the wear of the probe 2. Specifically, the auxiliary rod 12 can puncture the coating to leave a hole, and then the probe 2 can penetrate through the hole for measurement.

[0033] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. A fire retardant coating thickness measuring tool, characterized in that: It comprises a vertical rod (3), both sides of the lower end of the vertical rod (3) are fixedly connected to horizontal support rods (1), a sliding block (4) is arranged in the middle of the vertical rod (3) along the vertical direction, and a probe (2) is extended from the lower end of the sliding block (4); A battery (15), a triode (13), and an LED (9) are arranged inside the slider (4); the positive electrode of the battery (15), the probe (2), and the base of the triode (13) are electrically connected; the positive electrode of the battery (15) and the collector of the triode (13) are electrically connected; the emitter of the triode (13) and the negative electrode of the battery (15) are connected; and the LED (9) is connected in series to the circuit; A groove is provided at the upper portion of the slider (4), and one of the inner walls of the groove is an inclined surface (11). A fastener (10) is horizontally movably arranged in the groove. The fastener (10) is U-shaped, and one end of the fastener is slidably engaged with the inclined surface (11), and the other end rests on the surface of the slider (4).

2. A fire retardant coating thickness measuring tool according to claim 1, characterized in that: A resistor (14) is connected in series between the positive electrode of the battery (15) and the base line of the transistor (13), and the base of the transistor (13) and the probe (2) are electrically connected to the same side of the resistor (14).

3. A fire retardant coating thickness measuring tool according to claim 1, characterized in that: The probe (2) is arranged to pass through the slider (4), and a fixing screw (8) is threadedly connected to the slider (4), and the end of the fixing screw (8) abuts against the probe (2) to fix the probe (2).

4. A fire retardant coating thickness measuring tool according to claim 1, characterized in that: The side wall of the vertical rod (3) is provided with scales (5) along the vertical direction.

5. A fire retardant coating thickness measuring tool according to claim 1, characterized in that: A spring (6) is provided at the upper end of the sliding block (4), and the upper end of the spring (6) abuts against the upper part of the vertical rod (3).

6. A fire retardant coating thickness measuring tool according to claim 1, characterized in that: A storage groove is provided on one side of the upper portion of the vertical rod (3), and an auxiliary rod (12) is provided in the storage groove. A push block (7) is fixedly connected to the lower portion of the auxiliary rod (12), and the push block (7) is slidably fitted on the side wall of the vertical rod (3).

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