A constant temperature water tank for asphalt penetration tester

Abstract

The utility model discloses a constant temperature water tank for asphalt penetration tester detects, including the tank body, the tank body inside integral connection has the baffle, the heating pipe is installed to the tank body inside located baffle bottom, the adjusting assembly is installed to the tank body inside located baffle top, the adjusting assembly includes two translation module and shelf, two the translation module is vertically arranged in the tank body, the shelf is installed in two translation module top, one side of tank body inner wall is integrally provided with the mounting portion, the mounting portion surface evenly is equipped with the water outlet, the circulating water pump is fixed in the mounting portion, the water inlet end of circulating water pump is to the baffle, realizes the non -contact type positioning of the sample dish through mechanical adjusting assembly, completely avoids the local temperature fluctuation caused by manual hand or tool to extend into the water body, strictly maintains the temperature stability of water tank plus or minus 0.1 DEG C, fundamentally solves the detection result distortion problem caused by temperature disturbance in traditional operation.

Description

Technical Field

[0001] This utility model belongs to the field of asphalt testing technology, specifically relating to a constant temperature water bath for asphalt penetration testing. Background Technology

[0002] Asphalt penetration testing is a core test item for evaluating the high-temperature performance of asphalt materials, and its accuracy directly affects the quality control of road engineering. According to specifications, the test must be conducted in a strictly constant temperature environment. The constant temperature water bath, as a key component of the penetration tester, must provide a stable and uniform water bath environment for the sample dish holding the asphalt sample.

[0003] In current testing procedures, there is a significant technical flaw when adjusting the horizontal position of the sample dish within the tank to align with the insertion needle:

[0004] 1. Manual adjustment of interference temperature: If the operator puts their hand directly into the water tank, the operator's body temperature (approximately 36°C) will be instantly conducted to the constant-temperature water, causing local temperature fluctuations. Because the water tank temperature sensitivity requirement is extremely high (±0.1°C), such disturbances can easily exceed the allowable deviation, resulting in distorted penetration test results.

[0005] 2. Insufficient precision in tool operation: If tools such as tweezers or long rods are used to adjust the sample dish in the water, the water resistance, tool flexibility, and visual errors make it difficult to achieve precise positioning of the sample dish. Repeated adjustments take too long and affect the detection efficiency.

[0006] Existing constant temperature water baths generally lack dedicated positioning mechanisms. The aforementioned adjustment methods are not only cumbersome to operate, but also pose a dual threat to temperature field stability and positioning accuracy. Therefore, there is an urgent need to develop a constant temperature water bath with precise positioning function for sample dishes. This bath should enable rapid and precise adjustment of the sample dishes' positions without human contact or the need for external tools, fundamentally ensuring the temperature stability and ease of operation of the testing environment. Utility Model Content

[0007] To achieve the above objectives, this utility model provides the following technical solution: a constant temperature water bath for testing asphalt penetration, comprising a bath body, a partition integrally connected inside the bath body, a heating tube installed at the bottom of the partition inside the bath body, and an adjustment assembly installed at the top of the partition inside the bath body. The adjustment assembly includes two translation modules and a shelf, the two translation modules being vertically arranged inside the bath body, and the shelf being installed on top of the two translation modules.

[0008] As a preferred embodiment of this utility model, an installation part is integrally provided on one side of the inner wall of the tank, and water outlets are evenly opened on the surface of the installation part. A circulating water pump is fixed inside the installation part, with the water inlet of the circulating water pump facing the partition and the water outlet of the circulating water pump facing the water outlet.

[0009] As a preferred technical solution of this utility model, the translation module includes a screw, and guide rods are provided on both sides of the screw. The screw and guide rods are arranged in parallel. The two ends of the screw are rotatably connected to the side wall of the groove. The two ends of the guide rods are fixed to the side wall of the groove. Nut seats are threadedly connected to the threaded ends of the screw. The nut seats are slidably connected to the bottom end face of the shelf.

[0010] As a preferred technical solution of this utility model, both ends of the screw and the rotating connection of the groove body adopt a mechanical dynamic sealing structure.

[0011] As a preferred embodiment of this utility model, the tank is fixed with a control panel at the top of the mounting section, and the control panel is electrically connected to the heating pipe and the circulating water pump.

[0012] As a preferred embodiment of this utility model, the shelf surface is provided with water-permeable holes evenly distributed at the center.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This utility model achieves non-contact positioning of the sample dish through mechanical adjustment components, completely avoiding local temperature fluctuations caused by manual hands or tools being inserted into the water, strictly maintaining the temperature stability of the water tank at ±0.1℃, and fundamentally solving the problem of distorted test results caused by temperature disturbances in traditional operations.

[0015] (2) The translation module structure with screw-nut seat and guide rod is adopted. The high precision characteristics of the screw drive are used to realize the fine adjustment of the sample dish in the X and Y axis directions. Compared with the traditional tool operation, there is no need for repeated trial and error, which significantly shortens the positioning time and improves the detection efficiency.

[0016] (3) The circulating water pump and the outlet form a full-tank water circulation system, which, together with the permeable hole design of the shelf, effectively eliminates the phenomenon of water temperature stratification in the tank and ensures that the water temperature around the sample dish is consistent, further ensuring the environmental stability of the asphalt penetration test; the mechanical dynamic sealing structure of the screw and the tank ensures that there is no risk of leakage during the operation of the equipment; the control panel realizes the integrated control of heating and circulation, the operation interface is simple, reduces the cost of manual intervention, and is compatible with standardized testing procedures. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0020] Figure 3 This is a structural schematic diagram from another perspective of the present invention;

[0021] In the diagram: 1. Tank; 2. Baffle; 3. Heating tube; 4. Shelf; 5. Mounting part; 6. Outlet; 7. Water permeable hole; 8. Screw; 9. Guide rod; 10. Nut seat; 11. Control panel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example

[0024] Please see Figure 1-3 The present invention provides the following technical solution: a constant temperature water bath for testing asphalt penetration tester, comprising a tank body 1, a partition 2 integrally connected inside the tank body 1, a heating pipe 3 installed at the bottom of the partition 2 inside the tank body 1, and an adjustment assembly installed at the top of the partition 2 inside the tank body 1. The adjustment assembly includes two translation modules and a shelf 4. The two translation modules are vertically arranged inside the tank body 1, and the shelf 4 is installed on the top of the two translation modules.

[0025] In order to improve the uniformity of water temperature in the tank 1 and eliminate local temperature gradients, in this embodiment, as a preferred technical solution of the present invention, an installation part 5 is integrally provided on one side of the inner wall of the tank 1. The surface of the installation part 5 is evenly provided with water outlets 6. A circulating water pump is fixed inside the installation part 5. The water inlet of the circulating water pump faces the partition 2, and the water outlet of the circulating water pump faces the water outlet 6.

[0026] In order to achieve precise horizontal displacement adjustment of shelf 4 and ensure the positioning accuracy of sample dish, in this embodiment, as a preferred technical solution of the present invention, the translation module includes a screw 8, and guide rods 9 are provided on both sides of the screw 8. The screw 8 and guide rods 9 are arranged in parallel. The two ends of the screw 8 are rotatably connected to the side wall of the tank 1. The two ends of the guide rods 9 are fixed to the side wall of the tank 1. Nut seats 10 are threadedly connected to the threaded ends of the screw 8. The nut seats 10 are slidably connected to the bottom end face of shelf 4.

[0027] To prevent water from leaking through the rotational gap between the screw 8 and the tank 1, and to ensure the rotational flexibility of the screw 8, in this embodiment, as a preferred technical solution of the present invention, both ends of the screw 8 and the rotational connection of the tank 1 adopt a mechanical dynamic sealing structure.

[0028] In order to achieve intelligent control of the heating element 3 and the circulating water pump, and to conveniently adjust the water temperature and the start and stop status of water circulation, in this embodiment, as a preferred technical solution of the present invention, the tank 1 is fixed with a control panel 11 at the top of the mounting part 5, and the control panel 11 is electrically connected to the heating element 3 and the circulating water pump.

[0029] In order to ensure that water can flow freely through the shelf 4 and avoid the formation of stagnant water area below the shelf 4, and to further optimize the water temperature uniformity, in this embodiment, as a preferred technical solution of the present invention, water-permeable holes 7 are uniformly opened at the center of the surface of the shelf 4.

[0030] In summary, the working principle of this utility model, based on the above-described technical solution, is as follows:

[0031] Control panel 11 includes a temperature control module: a digital temperature display screen that displays the current water temperature in the tank in real time; a temperature setting touch key that allows setting a target temperature within a certain range; and a temperature sensor whose probe is placed inside the tank below the water level line to achieve real-time water temperature acquisition.

[0032] The control panel 11 also includes a circulation control module: a circulation pump start / stop button for independently controlling the operation of the circulation pump; and a flow adjustment touch key for multi-level adjustment of the water flow speed at the outlet 6 by changing the pump power supply frequency.

[0033] Status indicator area: Heating indicator light (e.g., red): illuminates when heating element 3 is working. Circulation indicator light (e.g., green): illuminates when the circulating water pump is running. Constant temperature indicator light (e.g., blue): illuminates after the water temperature reaches the set value and stabilizes.

[0034] Working mechanism of heating element 3 and circulating water pump

[0035] Temperature control process: After system startup, control panel 11 receives real-time data from the temperature sensor. When the measured temperature is lower than the set value, control panel 11 outputs a pulse signal to trigger heating element 3 to work. After reaching the set temperature, heating element 3 is kept working intermittently to maintain water temperature fluctuations not exceeding ±0.1℃.

[0036] Water circulation operation: The water pump draws water from the bottom of the tank 1 (near the surface of the partition plate 2) at the inlet end. After being pressurized by the impeller inside the pump, the water flows through the outlet 6 on the surface of the mounting part 5 to the working area at the top of the tank 1, forming a closed-loop circulating water flow, which promotes the exchange of water between the upper and lower layers and makes the water temperature in the working area uniform.

[0037] Control mechanism of translation adjustment mechanism

[0038] The translation module adopts a mechanical manual adjustment method. When in use, the sample dish is placed in the center of the shelf 4, and the shelf 4 is moved by manually rotating the knob at the end of the screw 8, thereby achieving precise positioning of the sample dish. The specific structure and operation are as follows:

[0039] In the two sets of vertically distributed translation modules, one end of the screw 8 extends to the outside of the groove 1, and the end is equipped with an anti-slip adjustment knob. Rotating the knob can drive the nut seat 10 to move along the screw axis.

[0040] The rotating connection between the screw 8 and the groove 1 adopts a mechanical dynamic seal structure to ensure that there is no water leakage when the knob is operated.

[0041] Adjust the operating procedure:

[0042] X-axis adjustment: Rotate the end knob of the horizontal translation module to drive the corresponding screw 8 to rotate, which in turn drives the shelf 4 (sample dish) to move left and right along the guide rod 9 through the nut seat 10.

[0043] Y-axis adjustment: Rotate the end knob of the longitudinal translation module to move the shelf 4 (sample dish) back and forth. The two modules can work together to complete the positioning at any position in the plane.

[0044] Finally, it should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A constant temperature water bath for testing asphalt penetration using an asphalt penetration tester, comprising a bath body (1), characterized in that: The tank (1) is integrally connected with a partition (2). A heating tube (3) is installed at the bottom of the partition (2) inside the tank (1). An adjustment assembly is installed at the top of the partition (2) inside the tank (1). The adjustment assembly includes two translation modules and a shelf (4). The two translation modules are vertically arranged inside the tank (1), and the shelf (4) is installed on the top of the two translation modules. The translation module includes a screw (8), and guide rods (9) are provided on both sides of the screw (8). The screw (8) and guide rods (9) are arranged in parallel. The two ends of the screw (8) are rotatably connected to the side wall of the groove (1). The two ends of the guide rods (9) are fixed on the side wall of the groove (1). Nut seats (10) are threadedly connected to the threaded ends of the screw (8). The nut seats (10) are slidably connected to the bottom end face of the shelf (4).

2. The constant temperature water bath for testing asphalt penetration according to claim 1, characterized in that: The tank (1) has an integrally installed mounting part (5) on one side of its inner wall. The mounting part (5) has evenly opened water outlets (6) on its surface. A circulating water pump is fixed inside the mounting part (5). The water inlet of the circulating water pump faces the partition (2), and the water outlet of the circulating water pump faces the water outlet (6).

3. The constant temperature water bath for testing asphalt penetration according to claim 1, characterized in that: The screw (8) and the groove (1) at both ends are mechanically sealed.

4. The constant temperature water bath for testing asphalt penetration according to claim 1, characterized in that: The tank (1) is fixed with a control panel (11) on top of the mounting part (5), and the control panel (11) is electrically connected to the heating pipe (3) and the circulating water pump.

5. The constant temperature water bath for testing asphalt penetration according to claim 1, characterized in that: The shelf (4) has water-permeable holes (7) evenly distributed at the center of its surface.

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