A high altitude type cement boiling tank

Abstract

The application relates to the technical field of cement performance detection equipment, in particular to a plateau type cement boiling box which comprises an outer frame, the outer frame is hollow, a pot body is located in the outer frame, a reinforcing layer is connected to the outer side of the pot body, a sealed cavity is formed between the pot body and the reinforcing layer, the sealed cavity is filled with gas, a pressure relief unit is connected to the reinforcing layer, the pressure relief unit is used for controlling the communication between the sealed cavity and the outside world, a pressure cover plate is covered on the pot body to form a boiling cavity used for heating, a heating unit is installed in the outer frame and used for heating the pot body, and a buckling unit is installed on the outer frame to make the pressure cover plate cover the pot body. The application has the effect of improving the safety factor of users when the boiling box is used to determine the stability of cement by the Ray method in plateau areas.

Description

Technical Field

[0001] This application relates to the technical field of cement performance testing equipment, and in particular to a high-altitude cement boiling tank. Background Technology

[0002] Stability is the uniformity of volume change after cement hardens. Uneven volume change can cause expansion, cracking, or warping. To measure the stability of cement, cement specimens are usually boiled in water. The stability of cement is then judged by the increase in the distance between the two pointers of the Le Chatelier clamp before and after boiling. However, boiling cement requires the use of a boiling chamber.

[0003] A cement boiling tank is disclosed in the prior art, comprising a heating device including an insulated box, which is divided into two parts: an electric heating box and an oil tank. The electric heating box is located below the oil tank and contains an electric heating tube. The oil tank contains heat-conducting oil. A boiling pot is located at the opening of the oil tank, and a sealing cover with a groove is located at the opening of the boiling pot. The groove contains coolant and is located at the end that does not contact the boiling pot. A safety valve connected to the boiling pot is located on the sealing cover. The safety valve includes a pressure relief pipe with a flow channel. A threaded plate that does not block the flow channel is located inside the pressure relief pipe. The threaded plate has a threaded hole that engages with a screw-shaped valve core. Two springs are fitted on the valve core, and a cover plate is located between the two springs. In the non-pressure relief state, the cover plate is in a position that seals the outlet end of the pressure relief pipe.

[0004] Regarding the aforementioned technologies, when conducting stability tests in high-altitude areas, the boiling point of water is below 100 degrees Celsius due to air pressure. Therefore, it is necessary to increase the pressure inside the boiling chamber to raise the boiling point of water and reduce the impact of boiling temperature on the accuracy of the stability test. However, after heating the lower end of the boiling pot, the strength of the boiling pot will decrease due to temperature, posing a safety hazard. Summary of the Invention

[0005] In order to improve the safety factor for users when using a boiling chamber to determine the soundness of cement by the Le Chatelier method in high-altitude areas, this application provides a high-altitude cement boiling chamber.

[0006] The technical solution for a high-altitude cement boiling tank provided in this application is as follows:

[0007] A high-altitude cement boiling tank, including

[0008] The outer frame is hollow.

[0009] The pot body is located inside the outer frame. A reinforcing layer is connected to the outside of the pot body, and a sealed cavity is formed between the pot body and the reinforcing layer. The sealed cavity is filled with gas, and a pressure relief unit is connected to the reinforcing layer. The pressure relief unit is used to control the communication between the sealed cavity and the outside.

[0010] A pressure cover plate, which is fitted onto the pot body to form a boiling chamber for heating;

[0011] A heating unit is installed inside the outer frame and is used to heat the pot body;

[0012] A fastening unit is installed on the outer frame to allow the pressure cover plate to close onto the pot body.

[0013] By adopting the above technical solution, water is added to the pot until the water level is appropriate. Then, the standard-cured test cake is removed from the glass plate and placed flat on the test cake rack inside the pot. The pressure cover is then fastened to the pot body by the fastening unit. The pot body is then heated by the heating unit. The heat from the pot body heats the water inside the pot through heat transfer until the water boils. At the same time, the heat from the pot body heats the gas inside the sealed cavity. The gas absorbs heat and expands, increasing the pressure inside the sealed cavity until it reaches the maximum pressure setting value of the pressure relief unit. However, the maximum pressure setting value inside the sealed cavity is less than the maximum pressure inside the pot. The pressure relief unit then starts to release gas, maintaining a relatively constant pressure inside the sealed cavity. This reduces the pressure difference between the inside and outside of the heating area at the lower end of the pot body. The output power of the heating unit is adjusted to keep the water boiling for three hours. Then, the pressure cover is opened to drain the water from the pot. After the test specimen cools to room temperature, it is removed for testing to obtain the stability data of the cement. The designed high-altitude cement boiling chamber facilitates the installation of the heating unit and the fastening unit through the outer frame. The fastening unit facilitates the fixing of the pressure cover to the pot body. The heating unit facilitates the heating of the pot body. The pressure relief unit facilitates the control of the maximum pressure in the sealed cavity. Through the cooperation of the pot body and the reinforcing layer, the pressure difference between the inner and outer sides of the pot body at the heating point is reduced during boiling. This reduces the possibility of the pot body changing or even tearing due to the pressure difference after heating, thereby improving the safety factor for users when using the boiling chamber in high-altitude areas.

[0014] In one specific implementation scheme, the pressure relief unit includes a connecting pipe, a sealing disc, a connecting rod, a spring, a retaining rod, and an adjusting component;

[0015] The connecting pipe is connected to the reinforcing layer, and the inner cavity of the connecting pipe is connected to the sealed cavity. Multiple exhaust ports are provided on the connecting pipe along its own axial direction.

[0016] The sealing disc is slidably connected to the inner wall of the connecting pipe, and is used to divide the inner cavity of the connecting pipe into two regions;

[0017] The connecting rod is connected to the sealing disc, and the connecting rod is slidably connected to the abutment rod;

[0018] The spring is sleeved on the connecting rod, with one end of the spring abutting against the sealing disc and the other end abutting against the abutting rod;

[0019] The abutment rod is slidably connected to the connecting pipe;

[0020] The adjusting component is installed on the connecting pipe and is used to adjust the relative position of the abutment rod and the connecting pipe.

[0021] By adopting the above technical solution, the heating unit heats the pot body, and the heat from the pot body radiates to the gas in the sealed cavity. After absorbing heat, the gas expands, increasing the gas pressure in the sealed cavity. At this time, the pressure difference acts on the sealing plate in the connecting pipe. After being subjected to force, the sealing plate exerts force on the spring, causing the spring to compress until the exhaust port connects with the sealed cavity, thereby releasing the gas in the sealed cavity and reducing the pressure. At the same time, the relative position of the abutment rod and the connecting pipe can be adjusted by the adjusting component, thereby improving the flexibility of pressure control in the sealed cavity. The designed pressure relief unit facilitates the release of gas in the sealed cavity through the cooperation of the connecting pipe and the sealing plate, facilitates the control of the sliding path of the sealing plate through the connecting rod, facilitates the application of force to the sealing plate through the abutment rod in conjunction with the spring, and facilitates the control of the relative position of the abutment rod and the connecting pipe through the adjusting component, thereby achieving the flexibility of gas pressure regulation in the sealed cavity.

[0022] In one specific implementation, the adjusting element includes an adjusting nut that is threadedly connected to the communicating pipe.

[0023] By adopting the above technical solution, the designed adjusting component allows for easy adjustment of the relative position of the abutment rod and the connecting pipe through the adjusting nut.

[0024] In one specific implementation, at least one pressure-reducing layer is connected to the side of the reinforcing layer away from the pot body, and a sealed pressure-reducing cavity is formed between the pressure-reducing layer and the reinforcing layer, and between two adjacent pressure-reducing layers.

[0025] By adopting the above technical solution, the designed pressure-reducing layer can gradually reduce the air pressure in multiple pressure-reducing chambers from the side closest to the pot body to the side furthest from the pot body by taking advantage of the phenomenon of progressively decreasing heat transfer. This reduces the pressure difference through a stepped pressure method, thereby improving the safety of the boiling tank.

[0026] In one specific implementation, heat-conducting pillars are connected between the reinforcing layer and the pressure-reducing layer, and between two adjacent pressure-reducing layers.

[0027] By adopting the above technical solution, the heat transfer rate between the reinforcing layer and the pressure reducing layer, or between two adjacent pressure reducing layers, can be improved through the heat-conducting column.

[0028] In one specific implementation, the heating unit is configured as an electromagnetic heater, the pot body is made of iron, and the electromagnetic heater heats the pot body through electromagnetic induction.

[0029] By adopting the above technical solution, the designed heating unit can directly heat the pot body by passing through the reinforcing layer through the electromagnetic heater, which facilitates the improvement of the heating efficiency of water in the pot body, and can make the gas pressure increase rate in the sealed cavity lower than the gas pressure increase rate in the boiling cavity.

[0030] In one specific implementation, an iron induction wire is provided inside the heat-conducting column, and the diameter of the iron induction wire gradually decreases from the side closer to the pot body to the side closer to the electromagnetic heater.

[0031] By adopting the above technical solution, the designed iron induction wire with gradually varying diameter can achieve different rates of pressure increase in different decompression chambers, thereby forming a stepped pressure difference.

[0032] In one specific implementation scheme, the pressure cover plate includes a cover plate body and multiple reinforcing ribs;

[0033] At least one annular reinforcing groove is coaxially provided on the cover plate body;

[0034] The reinforcing ribs are distributed circumferentially, and the extension lines of the reinforcing ribs pass through the vertical axis where the center of the annular reinforcing groove is located.

[0035] By adopting the above technical solution, the designed pressure cover plate can improve the strength of the cover plate body through the reinforcement ribs and annular reinforcing groove.

[0036] In one specific implementation scheme, an extension pipe is connected to the cover plate body, and one end of the extension pipe that extends out of the outer frame is connected to a four-way valve, and the other three ports of the four-way valve are respectively equipped with a safety valve, a pressure gauge and a vent valve.

[0037] By adopting the above technical solution, the designed extension pipe and four-way valve facilitate the installation of safety valves, pressure gauges, and venting valves. The pressure gauges facilitate real-time monitoring of the pressure inside the boiling chamber.

[0038] In one specific implementation, the fastening unit includes a force-applying ring and a fixing strip;

[0039] The force-applying ring is coaxially overlapped on the side of the cover plate body away from the pot body;

[0040] The number of fixing strips is multiple, and the multiple fixing strips are distributed around the circumference of the force-applying ring. The fixing strips are fixed to the inner side of the outer frame, and the fixing strips are threaded with a clamping screw, which abuts against the force-applying ring.

[0041] By adopting the above technical solution, the designed fastening unit uses a force-applying ring to provide a force-bearing point for the clamping screw, avoiding direct contact between the cover plate body and the clamping screw that could cause damage. The fixing strip and the clamping screw facilitate applying force to the force-applying ring, thereby ensuring a tight fit between the cover plate body and the pot body.

[0042] In summary, this application includes at least one of the following beneficial technical effects:

[0043] 1. The designed high-altitude cement boiling tank facilitates the installation of heating and fastening units via an outer frame. The fastening unit facilitates the fixing of the pressure cover plate to the pot body. The heating unit facilitates heating of the pot body. The pressure relief unit facilitates control of the maximum pressure within the sealed cavity. Through the cooperation of the pot body and the reinforcing layer, the pressure difference between the inner and outer sides of the heating area of ​​the pot body is reduced during boiling. This reduces the possibility of the pot body cracking or even tearing due to pressure difference after heating, thereby improving the safety factor for users when using the boiling tank in high-altitude areas.

[0044] 2. The designed high-altitude cement boiling tank facilitates the discharge of gas from the sealed cavity through the cooperation of the connecting pipe and the sealing plate. The connecting rod facilitates the control of the sliding path of the sealing plate, the abutting rod facilitates the application of force to the sealing plate in conjunction with the spring, and the adjusting component facilitates the control of the relative position of the abutting rod and the connecting pipe, thereby achieving flexibility in the gas pressure regulation within the sealed cavity.

[0045] 3. The designed high-altitude cement boiling tank can directly heat the pot body by passing through the reinforcing layer through an electromagnetic heater, which facilitates the improvement of the heating efficiency of the water in the pot and ensures that the gas pressure increase rate in the sealed cavity is lower than that in the boiling cavity. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the overall structure of the high-altitude cement boiling tank according to an embodiment of this application.

[0047] Figure 2 yes Figure 1 A partial structural diagram.

[0048] Figure 3 yes Figure 2 A partial schematic diagram after sectioning.

[0049] Figure 4 yes Figure 3 Enlarged schematic diagram of part A.

[0050] Explanation of reference numerals in the attached drawings: 1. Outer frame; 2. Pot body; 3. Reinforcing layer; 31. Boiling chamber; 4. Sealed chamber; 5. Pressure relief unit; 51. Connecting pipe; 511. Exhaust port; 52. Sealing plate; 53. Connecting rod; 54. Spring; 55. Abutting rod; 56. Adjusting component; 561. Adjusting nut; 6. Pressure cover plate; 61. Cover plate body; 62. Reinforcing rib; 63. Annular reinforcing groove; 7. Heating unit; 71. Electromagnetic heater; 8. Fastening unit; 81. Force ring; 82. Fixing strip; 83. Abutting screw; 9. Pressure relief layer; 10. Pressure relief chamber; 11. Heat-conducting column; 12. Iron induction wire; 13. Extension pipe; 14. Four-way valve; 15. Safety valve; 16. Pressure gauge; 17. Venting valve. Detailed Implementation

[0051] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0052] This application discloses a high-altitude cement boiling tank.

[0053] Reference Figure 1 , Figure 2 as well as Figure 3 A high-altitude cement boiling tank includes an outer frame 1, a pot body 2, a pressure cover plate 6, a pressure relief unit 5, a heating unit 7, and a fastening unit 8. The outer frame 1 is hollow, and the pot body 2 is located inside the outer frame 1. The pot body 2 is hemispherical, and a reinforcing layer 3 is bonded to the outside of the pot body 2. A sealed cavity 4 is formed between the reinforcing layer 3 and the pot body 2, and the sealed cavity 4 is filled with gas. In this application, the gas can be nitrogen, air, or an inert gas, as long as it can expand in volume after absorbing heat.

[0054] Reference Figure 2 The pressure cover plate 6 includes a cover plate body 61 and multiple reinforcing ribs 62. The cover plate body 61 covers the pot body 2 to form a boiling chamber 31. In order to improve the strength of the cover plate body 61, at least one annular reinforcing groove 63 is coaxially provided on the cover plate body 61. In this embodiment, there are two annular reinforcing grooves 63. The multiple reinforcing ribs 62 are distributed circumferentially, and the extension line of the reinforcing ribs 62 passes through the vertical axis where the center of the annular reinforcing groove 63 is located. The reinforcing ribs 62 and the cover plate body 61 are integrally connected.

[0055] Reference Figure 1 To facilitate real-time monitoring of the gas pressure inside the boiling chamber 31, an extension pipe 13 is welded onto the cover plate body 61. The inner cavity of the extension pipe 13 is connected to the boiling chamber 31, and a four-way valve 14 is connected to one end of the extension pipe 13 through the outer frame 1 via a flange. The other three ports of the four-way valve 14 are respectively flange-connected to a safety valve 15, a pressure gauge 16, and a vent valve 17, so as to realize the control of the maximum gas pressure inside the boiling chamber 31 and the real-time monitoring and display of the gas pressure.

[0056] Reference Figure 1 To facilitate pressing the cover plate body 61 onto the pot body 2 to form the boiling chamber 31, the fastening unit 8 includes a force-applying ring 81 and a fixing strip 82. One side of the force-applying ring 81 matches the side of the cover plate body 61 away from the pot body 2. The force-applying ring 81 overlaps the cover plate body 61. There are multiple fixing strips 82, which are distributed around the circumference of the force-applying ring 81. The fixing strips 82 are welded to the inner side of the outer frame 1. The fixing strips 82 are threaded with a tightening screw 83, which abuts against the side of the force-applying ring 81 away from the pot body 2.

[0057] Reference Figure 3 and Figure 4 To facilitate control of the connection between the sealed cavity 4 and the outside, the pressure relief unit 5 includes a connecting pipe 51, a sealing disc 52, a connecting rod 53, a spring 54, abutment rod 55, and an adjusting component 56. The connecting pipe 51 is connected to the flange of the reinforcing layer 3, and the inner cavity of the connecting pipe 51 is connected to the sealed cavity 4. Multiple exhaust ports 511 are provided along the axial direction of the connecting pipe 51. The sealing disc 52 is slidably connected to the inner wall of the connecting pipe 51, dividing the inner cavity of the connecting pipe 51 into two areas. The connecting rod 53 is welded to the sealing disc 52, and the connecting rod 53 passes through and is slidably connected to the abutment rod 55. The spring 54 is sleeved on the connecting rod 53, and one end of the spring 54 abuts against the sealing disc 52 and the other end abuts against the abutment rod 55. The adjusting component 56 includes an adjusting nut 561. The connecting pipe 51 has a strip groove along its own axial direction for the abutment rod 55 to slide. The adjusting nut 561 and the connecting pipe 51 are threadedly connected, and the abutment rod 55 abuts against the adjusting nut 561.

[0058] Reference Figure 3 To further improve safety by reducing pressure difference, at least one pressure-reducing layer 9 is sealed on the side of the reinforcing layer 3 away from the pot body 2. A sealed pressure-reducing cavity 10 is formed between the pressure-reducing layer 9 and the reinforcing layer 3, and between two adjacent pressure-reducing layers 9. In this embodiment, there are two pressure-reducing layers 9. To further improve the heat transfer effect, multiple heat-conducting columns 11 are snapped between the reinforcing layer 3 and the pressure-reducing layer 9, and between two adjacent pressure-reducing layers 9.

[0059] Reference Figure 2 and Figure 3The heating unit 7 is set as an electromagnetic heater 71. The pot body 2 is made of iron. The electromagnetic heater 71 heats the lower end of the pot body 2 through electromagnetic induction. In order to achieve stepped air pressure in the pressure reducing chamber 10 at the same time, an iron induction wire 12 is embedded in the heat-conducting column 11. The diameter of the iron induction wire 12 gradually decreases from the side near the pot body 2 to the side near the electromagnetic heater 71. In order to reduce heat loss during heating, the sealed cavity 4 is filled with heat-insulating material. The heat-insulating material fills the upper part of the sealed cavity 4 and forms a heat-insulating layer.

[0060] The implementation principle of a high-altitude cement boiling chamber according to an embodiment of this application is as follows: Water is added to the pot body 2 until the water level is appropriate. Then, the standard-cured test cake is removed from the glass plate and placed flat on the test cake rack inside the pot body 2. Then, the pressure cover plate 6 is fastened to the pot body 2 by the fastening unit 8. Then, the pot body 2 is heated by the electromagnetic heater 71. The heat from the pot body 2 heats the water inside the pot body 2 through heat transfer until the water in the pot body 2 boils. At the same time, the heat from the pot body 2 heats the gas inside the sealed cavity 4. After absorbing heat, the gas expands, which increases the pressure inside the sealed cavity 4 until it reaches the maximum gas pressure setting value of the pressure relief unit 5. The maximum gas pressure setting value inside the sealed cavity 4 is less than the pressure inside the pot body 2. When the air pressure reaches its maximum value, the pressure relief unit 5 starts to release air, thus maintaining a relatively constant pressure within the sealed chamber 4. This reduces the pressure difference between the inner and outer sides of the heating area at the lower end of the pot body 2. Simultaneously, the heat-conducting column 11 transfers heat, and the electromagnetic heater 71 and the iron induction wire 12 heat the pressure-reducing chamber 10 through electromagnetic induction. This causes the air pressure in the boiling chamber 31, the sealed chamber 4, and the two pressure-reducing chambers 10 to decrease gradually from the inside out. At this point, the pressure difference between the two sides of the single-layer structure decreases, and the water is kept boiling by adjusting the output power of the heating unit 7. After boiling for three hours, the pressure cover 6 is opened to drain the water from the pot body 2. Once the test cake has cooled to room temperature, the specimen can be removed for testing to obtain the stability data of the cement.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-altitude cement boiling tank, characterized in that: include The outer frame (1) is hollow; The pot body (2) is located inside the outer frame (1). A reinforcing layer (3) is connected to the outside of the pot body (2), and a sealed cavity (4) is formed between the pot body (2) and the reinforcing layer (3). The sealed cavity (4) is filled with gas, and a pressure relief unit (5) is connected to the reinforcing layer (3). The pressure relief unit (5) is used to control the connection between the sealed cavity (4) and the outside. Pressure cover plate (6), which covers the pot body (2) to form a boiling chamber (31) for heating; Heating unit (7), which is installed inside the outer frame (1) and is used to heat the pot body (2); The fastening unit (8) is installed on the outer frame (1) so that the pressure cover plate (6) covers the pot body (2); The reinforcing layer (3) is connected to at least one pressure-reducing layer (9) on the side away from the pot body (2). A pressure-reducing cavity (10) is formed between the pressure-reducing layer (9) and the reinforcing layer (3) and between two adjacent pressure-reducing layers (9). Heat-conducting columns (11) are connected between the reinforcing layer (3) and the pressure-reducing layer (9), and between two adjacent pressure-reducing layers (9); The heating unit (7) is configured as an electromagnetic heater (71), the pot body (2) is made of iron, and the electromagnetic heater (71) heats the pot body (2) through electromagnetic induction; The heat-conducting column (11) is provided with an iron induction wire (12), and the diameter of the iron induction wire (12) gradually decreases from the side closer to the pot body (2) to the side closer to the electromagnetic heater (71).

2. The high-altitude cement boiling tank according to claim 1, characterized in that: The pressure relief unit (5) includes a connecting pipe (51), a sealing plate (52), a connecting rod (53), a spring (54), an abutment rod (55), and an adjusting component (56); The connecting pipe (51) is connected to the reinforcing layer (3), and the inner cavity of the connecting pipe (51) is connected to the sealed cavity (4). Multiple exhaust ports (511) are provided on the connecting pipe (51) along its own axial direction. The sealing disc (52) is slidably connected to the inner wall of the connecting pipe (51) to divide the inner cavity of the connecting pipe (51) into two regions; The connecting rod (53) is connected to the sealing disc (52), and the connecting rod (53) is slidably connected to the abutting rod (55); The spring (54) is sleeved on the connecting rod (53), and one end of the spring (54) abuts against the sealing disc (52), and the other end abuts against the abutting rod (55); The abutment rod (55) is slidably connected to the connecting pipe (51); The adjusting member (56) is installed on the connecting pipe (51) and is used to adjust the relative position of the abutting rod (55) and the connecting pipe (51).

3. The high-altitude cement boiling tank according to claim 2, characterized in that: The adjusting component (56) includes an adjusting nut (561), which is threadedly connected to the connecting pipe (51).

4. The high-altitude cement boiling tank according to claim 1, characterized in that: The pressure cover plate (6) includes a cover plate body (61) and multiple reinforcing ribs (62); At least one annular reinforcing groove (63) is coaxially provided on the cover plate body (61); The multiple reinforcing ribs (62) are distributed circumferentially, and the extension lines of the reinforcing ribs (62) pass through the vertical axis where the center of the annular reinforcing groove (63) is located.

5. The high-altitude cement boiling tank according to claim 4, characterized in that: The cover plate body (61) is connected to an extension pipe (13), and one end of the extension pipe (13) that extends out of the outer frame (1) is connected to a four-way valve (14). The other three ports of the four-way valve (14) are respectively equipped with a safety valve (15), a pressure gauge (16), and a venting valve (17).

6. The high-altitude cement boiling tank according to claim 4, characterized in that: The fastening unit (8) includes a force-applying ring (81) and a fixing strip (82); The force-applying ring (81) is coaxially overlapped on the side of the cover plate body (61) away from the pot body (2); The number of fixing strips (82) is multiple, and the multiple fixing strips (82) are distributed around the circumference of the force-applying ring (81). The fixing strips (82) are fixed to the inner side of the outer frame (1), and the fixing strips (82) are threadedly connected to the tightening screws (83), which abut against the force-applying ring (81).

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