A cement-based grout water content detection device

Abstract

The utility model discloses a cement base grouting material moisture content detection device relates to building material detection technical field, including drying box, and drying box includes sealed box, and the top fixed mounting of sealed box has air pressure subassembly, and the inner wall on sealed box is provided with drying subassembly, and the fixed mounting of weighing instrument has in the bottom plate middle part of sealed box, and the open box is placed on weighing instrument, and the upside of open box is provided with the heater of fixed mounting on sealed box, this device carries out air extraction to drying box through the diaphragm pump in air pressure subassembly, through reducing the air pressure in the box, the boiling point of water is greatly reduced, makes it can carry out fast evaporation under lower temperature, avoids the damage to heat sensitivity additive or hydrate under high temperature, ensures that the sample chemical property after drying is identical with original state, makes the final measurement result more real and accurate, after drying is completed, and air pump injects the air to the box, carries out cooling treatment through low temperature air, improves detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of building material testing technology, specifically to a device for detecting the moisture content of cement-based grouting materials. Background Technology

[0002] Cement-based grouting materials are engineering materials made by mixing cement, aggregates, admixtures, and water in a specific ratio. They are widely used in applications such as bolt anchoring, structural reinforcement, and prestressed duct filling. Different applications have specific requirements for moisture content, making accurate measurement of moisture content crucial.

[0003] Currently, the common method for moisture content detection is the gravimetric method: the initial mass of the sample is measured, and after drying, the mass of the dried material is measured. The moisture content is then calculated from the difference in mass. However, this method has significant limitations: to ensure sufficient evaporation of moisture, the drying temperature needs to be significantly higher than the boiling point of water (100°C); but excessively high temperatures (such as the standard 105-110°C) can easily lead to the decomposition of cement hydration products or the volatilization of admixtures, introducing non-moisture losses and severely affecting the accuracy of the detection. Based on this, this paper proposes a novel device for detecting the moisture content of cement-based grouting materials. Utility Model Content

[0004] To solve the above-mentioned technical problems, a device for detecting the moisture content of cement-based grouting materials is provided. This technical solution solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A device for detecting the moisture content of cement-based grouting material includes a drying chamber. The drying chamber includes a sealed chamber body. A pneumatic component is fixedly installed at the top of the sealed chamber body. A drying component is installed on the inner wall of the sealed chamber body. A weighing instrument is fixedly installed in the middle of the bottom plate of the sealed chamber body. An open material box is placed on the weighing instrument. A heater is fixedly installed on the upper side of the open material box body. The pneumatic component includes a diaphragm pump fixedly installed on the sealed chamber body. An air extraction pipe is fixedly installed at the inlet of the diaphragm pump body. The lower end of the air extraction pipe is connected to the sealed chamber body and a solenoid valve is fixedly installed on the air extraction pipe. An air outlet pipe is fixedly installed at the outlet of the diaphragm pump body. A cooling section is provided on the right side of the diaphragm pump body.

[0007] Preferably, the cooling unit includes an air pump fixedly installed at the top of the sealed housing. An air inlet pipe is fixedly installed at the output port of the air pump. The lower end of the air inlet pipe is connected to the sealed housing. A connecting pipe is fixedly installed at the input port of the air pump. A purification component for filtering cooling air is provided on the front side of the connecting pipe.

[0008] Preferably, the purification component includes a fixed box that is fixedly installed on a sealed housing, and a partition plate is fixedly connected inside the fixed box, which divides the fixed box into a first cavity and a second cavity.

[0009] A fixed frame is fixedly installed in the first cavity. The rear end of the fixed frame is connected to a connecting pipe that penetrates into the fixed box. A duct pipe is fixedly installed at the front end of the fixed frame. Several sets of drying silicon plates and filter screens are fixedly installed inside the fixed frame.

[0010] A bent pipe is fixedly installed in the second cavity, and the second cavity is filled with coolant. A cooler is fixedly installed on the lower side of the bent pipe on the fixed box. The rear end of the bent pipe passes through the fixed box, and the front end of the bent pipe passes through the partition plate and is connected to the air guide pipe.

[0011] Preferably, a sealing box door is rotatably installed at the front end of the sealing box, a control panel is fixedly installed on the sealing box door, a vent pipe is fixedly installed on the top left side of the sealing box, and a one-way valve is fixedly installed on the vent pipe.

[0012] Preferably, it includes support frames that are fixedly installed on the inner walls of the left and right sides of the sealed box, a drying box that is slidably connected inside the support frame, a detachable box cover that is provided at the front end of the drying box, and two sets of triangular blocks that are provided on the front side of the box cover.

[0013] Two sets of triangular blocks are symmetrically and fixedly connected to the inner wall of the sealed box. An L-shaped baffle is rotatably installed on the inclined surface of the triangular blocks. The side of the L-shaped baffle abuts against the box cover, and a spring is fixedly connected between the L-shaped baffle and the sealed box. The spring is in a compressed state.

[0014] Compared with the prior art, this utility model proposes a device for detecting the moisture content of cement-based grouting materials, which has the following beneficial effects:

[0015] 1. This utility model incorporates a pneumatic component. This component uses a diaphragm pump to extract air from the drying chamber, significantly reducing the internal pressure. Utilizing the sensitivity of water's boiling point to air pressure, the boiling point of water is drastically lowered, allowing for rapid evaporation at a lower temperature. This avoids damage to heat-sensitive additives (such as polymers) or hydration products in cement-based materials at high temperatures, ensuring that the drying process removes only the target moisture (free water and weakly bound water), minimizing thermal damage, and ensuring that the chemical properties of the dried sample remain consistent with its original state, resulting in more accurate and reliable measurement results. Simultaneously, it shortens the drying time to some extent. After drying, an air pump injects air into the chamber. The incoming air is rapidly cooled by a coolant and a refrigerator, then passes through a filter to block dust, and the drying silicon plate thoroughly absorbs residual moisture. This ensures that the air entering the chamber is low-temperature, dry, and clean, preventing external humid and hot air from interfering with the drying environment and affecting weighing accuracy. The low-temperature air also allows for rapid cooling of the open material box after drying, facilitating removal and improving testing efficiency.

[0016] 2. In this utility model, the weighing instrument is directly installed at the bottom of the sealed box, and the open material box is placed on it, so that the sample can be continuously weighed without being moved out during the entire drying process. This avoids the error risk caused by transferring the sample, and can monitor the mass change in real time, accurately determine the drying endpoint, that is, when the gravity no longer changes, thereby improving the overall measurement accuracy and efficiency.

[0017] 3. This utility model is equipped with a drying component. The drying box in the drying component is used to hold desiccant. The desiccant continuously absorbs residual water vapor and steam released by the sample in the chamber, maintains an ultra-low humidity environment, accelerates the drying process and prevents moisture back seepage. At the same time, by moving the L-shaped baffles on the upper and lower sides, the box lid is no longer blocked, so the sliding box can be quickly replaced, which is convenient for replacing the desiccant. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the internal structure of the drying oven in this utility model;

[0020] Figure 3 This is a schematic diagram of the drying box in this utility model;

[0021] Figure 4 This is a schematic diagram of the pneumatic component in this utility model;

[0022] Figure 5 This is a schematic diagram of the cooling section in the pneumatic assembly of this utility model;

[0023] Figure 6 This is a schematic diagram of the drying component of this utility model.

[0024] The numbers on the map are:

[0025] 1. Drying oven; 2. Pneumatic assembly; 3. Weighing instrument; 4. Open material box; 5. Drying assembly; 6. Heater; 7. Control panel;

[0026] 101. Sealed enclosure; 102. Sealed enclosure door; 103. Vent pipe; 104. Check valve;

[0027] 201. Diaphragm pump; 202. Suction pipe; 203. Solenoid valve; 204. Outlet pipe; 205. Air pump; 206. Inlet pipe; 207. Connecting pipe; 208. Fixture box; 209. Divider plate; 2010. Fixture frame; 2011. Drying silicon plate; 2012. Filter screen; 2013. Air guide pipe; 2014. Bend; 2015. Refrigerator;

[0028] 501. Support frame; 502. Drying box; 503. Box lid; 504. Triangular block; 505. L-shaped baffle; 506. Spring. Detailed Implementation

[0029] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0030] Reference Figure 1-2 As shown, a device for detecting the moisture content of cement-based grout includes a drying box 1, which includes a sealed box body 101. A pneumatic component 2 is fixedly installed on the top of the sealed box body 101, a drying component 5 is provided on the inner wall of the sealed box body 101, a weighing instrument 3 is fixedly installed in the middle of the bottom plate of the sealed box body 101, an open material box 4 is placed on the weighing instrument 3, and a heater 6 is fixedly installed on the sealed box body 101 on the upper side of the open material box 4.

[0031] Furthermore, during measurement, the weighing instrument 3 is directly installed at the bottom of the sealed box 101, and the open material box 4 is placed on it, so that the sample can be continuously weighed without being moved out during the entire drying process. This avoids the error risk caused by transferring the sample, and can monitor the mass change in real time, accurately determine the drying endpoint, that is, when the gravity no longer changes, thereby improving the overall measurement accuracy and efficiency.

[0032] Reference Figure 4-5 Specifically, in this embodiment, the pneumatic assembly 2 includes a diaphragm pump 201 fixedly installed on the sealed housing 101. An air extraction pipe 202 is fixedly installed at the inlet of the diaphragm pump 201. The lower end of the air extraction pipe 202 is connected to the sealed housing 101, and a solenoid valve 203 is fixedly installed on the air extraction pipe 202. An air outlet pipe 204 is fixedly installed at the outlet of the diaphragm pump 201, and a cooling section is provided on the right side of the diaphragm pump 201.

[0033] Furthermore, by using a diaphragm pump 201 to extract air from the drying chamber 1, the air pressure inside the chamber can be significantly reduced. Utilizing the sensitivity of water boiling point to air pressure, the boiling point of water is greatly reduced, allowing water to evaporate rapidly at a lower temperature. This avoids damage to heat-sensitive additives (such as polymers) or hydration products in cement-based materials at high temperatures, ensuring that the drying process only removes the target moisture (free water and weakly bound water), minimizing thermal damage, and ensuring that the chemical properties of the dried sample are consistent with its original state. This results in more accurate and reliable measurement results, while also shortening the drying time to some extent.

[0034] Reference Figure 4-5Specifically, in this embodiment, the cooling unit includes an air pump 205 fixedly installed at the top of the sealed housing 101. An air inlet pipe 206 is fixedly installed at the output port of the air pump 205. The lower end of the air inlet pipe 206 is connected to the sealed housing 101. A connecting pipe 207 is fixedly installed at the input port of the air pump 205. A purification component for filtering cooling air is provided on the front side of the connecting pipe 207.

[0035] Reference Figure 4-5 Specifically, in this embodiment, the purification component includes a fixed box 208 fixedly installed on a sealed housing 101. A partition plate 209 is fixedly connected inside the fixed box 208, dividing the fixed box 208 into a first cavity and a second cavity. A fixed frame 2010 is fixedly installed in the first cavity. The rear end of the fixed frame 2010 is connected to a connecting pipe 207 that penetrates into the fixed box 208. A duct pipe 2013 is fixedly installed at the front end of the fixed frame 2010. Several sets of drying silicon plates 2011 and filter screens 2012 are fixedly installed inside the fixed frame 2010. A bent pipe 2014 is fixedly installed in the second cavity, and the second cavity is filled with coolant. A cooler 2015 is fixedly installed on the lower side of the bent pipe 2014 on the fixed box 208. The rear end of the bent pipe 2014 penetrates out of the fixed box 208, and the front end of the bent pipe 2014 penetrates the partition plate 209 and is connected to the duct pipe 2013.

[0036] Furthermore: After drying, air pump 205 injects air into chamber 101. As the air moves within the curved tube 2014, the coolant on the outside is rapidly cooled by the cooler 2015. Heat exchange occurs between the coolant and the curved tube 2014, causing the air inside the curved tube 2014 to cool down rapidly. The air then enters the fixed frame 2010 through the air guide tube 2013. Inside the fixed frame 2010, dust is blocked by the filter screen 2012, and the drying silicon plate 2011 thoroughly absorbs residual moisture. This ensures that the air finally introduced into the chamber is low-temperature, dry, and clean, preventing external humid and hot air from interfering with the drying environment and affecting weighing accuracy. The low-temperature air can quickly cool the open material box 4 after drying, making it easy to remove and improving testing efficiency.

[0037] Reference Figure 3 Specifically, in this embodiment, a sealing box door 102 is rotatably installed at the front end of the sealing box 101, a control panel 7 is fixedly installed on the sealing box door 102, a vent pipe 103 is fixedly installed on the top left side of the sealing box 101, and a one-way valve 104 is fixedly installed on the vent pipe 103.

[0038] Furthermore, the one-way valve 104 is designed so that when the air pressure assembly 2 evacuates air from the inside of the housing 101, it blocks the vent pipe 103 to prevent outside air from entering the housing 101 through the vent pipe 103. When the cooling unit vents air for cooling, the one-way valve 104 acts as a pressure relief valve to prevent the gas pressure inside the housing 101 from becoming too high.

[0039] Reference Figure 6 Specifically, in this embodiment, a support frame 501 is fixedly installed on the inner walls of the left and right sides of the sealed box 101. A drying box 502 is slidably connected inside the support frame 501. A detachable box cover 503 is provided at the front end of the drying box 502. Two sets of triangular blocks 504 are provided on the front side of the box cover 503. The two sets of triangular blocks 504 are symmetrically fixedly connected to the inner wall of the sealed box 101. An L-shaped baffle 505 is rotatably installed on the inclined surface of the triangular block 504. The side of the L-shaped baffle 505 abuts against the box cover 503. A spring 506 is fixedly connected between the L-shaped baffle 505 and the sealed box 101. The spring 506 is in a compressed state.

[0040] Furthermore, the drying box 502 in the drying assembly 5 is used to hold the desiccant. The desiccant continuously absorbs residual moisture and vapor released by the sample in the chamber, maintaining an ultra-low humidity environment, accelerating the drying process and preventing moisture backflow. At the same time, by moving the L-shaped baffles 505 on the upper and lower sides, the box cover 503 can be removed, allowing the sliding box 502 to be quickly replaced, facilitating the replacement of the desiccant.

[0041] The working principle of this utility model is as follows: When in use, the worker places the sample to be tested in the open material box 4, then closes the box door, and starts the diaphragm pump 201 in the air pressure assembly 2. The diaphragm pump 201 draws air from the drying box 1, thereby significantly reducing the air pressure inside the box. Then, the heater 6 is started to dry the sample in the open material box 4. By utilizing the sensitivity of water boiling point to air pressure, the boiling point of water is significantly reduced, allowing water to evaporate quickly at a lower temperature. This avoids damage to heat-sensitive additives (such as polymers) or hydration products in cement-based materials at high temperatures, ensuring that the drying process only removes the target moisture (free water and weakly bound water), minimizing heat damage, and ensuring that the chemical properties of the dried sample are consistent with the original state, making the final measurement results more realistic and accurate. At the same time, the drying time is shortened to a certain extent.

[0042] During the drying process, the desiccant placed in the drying box 502 in the drying component 5 can continuously absorb the residual moisture and vapor released by the sample in the chamber, maintain the ultra-low humidity environment inside the chamber 101, accelerate the drying process and prevent moisture back seepage.

[0043] After drying, air pump 205 injects air into chamber 101. As the air moves within the curved tube 2014, the coolant on the outside is rapidly cooled by the cooler 2015. Heat exchange occurs between the coolant and the curved tube 2014, causing the air inside the curved tube 2014 to cool down quickly. The air then enters the fixed frame 2010 through the air guide tube 2013. Inside the fixed frame 2010, dust is blocked by the filter screen 2012, and the drying silicon plate 2011 completely absorbs residual moisture. This ensures that the air finally introduced into the chamber is low-temperature, dry, and clean, preventing external humid and hot air from interfering with the drying environment and affecting weighing accuracy. The low-temperature air can quickly cool the open material box 4 after drying, making it easy to remove and improving testing efficiency.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the moisture content of cement-based grouting material, characterized in that, The equipment includes a drying oven (1), which includes a sealed box body (101). A pneumatic assembly (2) is fixedly installed on the top of the sealed box body (101). A drying assembly (5) is provided on the inner wall of the sealed box body (101). A weighing instrument (3) is fixedly installed in the middle of the bottom plate of the sealed box body (101). An open material box (4) is placed on the weighing instrument (3). A heater (6) is fixedly installed on the upper side of the open material box (4) on the sealed box body (101). The pneumatic assembly (2) includes a diaphragm pump (201) fixedly installed on a sealed housing (101). An air extraction pipe (202) is fixedly installed at the inlet of the diaphragm pump (201). The lower end of the air extraction pipe (202) is connected to the sealed housing (101). A solenoid valve (203) is fixedly installed on the air extraction pipe (202). An air outlet pipe (204) is fixedly installed at the outlet of the diaphragm pump (201). A cooling section is provided on the right side of the diaphragm pump (201).

2. The device for detecting the moisture content of cement-based grouting material according to claim 1, characterized in that: The cooling unit includes an air pump (205) fixedly installed at the top of the sealed housing (101). An air inlet pipe (206) is fixedly installed at the output port of the air pump (205). The lower end of the air inlet pipe (206) is connected to the sealed housing (101). A connecting pipe (207) is fixedly installed at the input port of the air pump (205). A purification component for filtering cooling air is provided on the front side of the connecting pipe (207).

3. The device for detecting the moisture content of cement-based grouting material according to claim 2, characterized in that: The purification component includes a fixed box (208) fixedly installed on a sealed box (101), and a partition plate (209) is fixedly connected inside the fixed box (208), which divides the fixed box (208) into a first cavity and a second cavity. A fixing frame (2010) is fixedly installed in the first cavity. The rear end of the fixing frame (2010) is connected to a connecting pipe (207) that penetrates into the fixing box (208). A gas guide pipe (2013) is fixedly installed at the front end of the fixing frame (2010). Several sets of drying silicon plates (2011) and filter screens (2012) are fixedly installed inside the fixing frame (2010). A bent pipe (2014) is fixedly installed in the second cavity, and the second cavity is filled with coolant. A cooler (2015) is fixedly installed on the lower side of the bent pipe (2014) on the fixed box (208). The rear end of the bent pipe (2014) passes through the fixed box (208), and the front end of the bent pipe (2014) passes through the partition plate (209) and is connected to the air guide pipe (2013).

4. The device for detecting the moisture content of cement-based grouting material according to claim 1, characterized in that: A sealing box door (102) is rotatably installed at the front end of the sealing box (101), and a control panel (7) is fixedly installed on the sealing box door (102). A vent pipe (103) is fixedly installed on the left side of the top of the sealing box (101), and a one-way valve (104) is fixedly installed on the vent pipe (103).

5. The device for detecting the moisture content of cement-based grouting material according to claim 1, characterized in that: It includes a support frame (501) that is fixedly installed on the inner walls of the left and right sides of the sealed box (101). A drying box (502) is slidably connected inside the support frame (501). A detachable box cover (503) is provided at the front end of the drying box (502). Two sets of triangular blocks (504) are provided on the front side of the box cover (503). Two sets of triangular blocks (504) are symmetrically fixedly connected to the inner wall of the sealed box (101). An L-shaped baffle (505) is rotatably installed on the inclined surface of the triangular block (504). The side of the L-shaped baffle (505) abuts against the box cover (503). A spring (506) is fixedly connected between the L-shaped baffle (505) and the sealed box (101). The spring (506) is in a compressed state.

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