Wall steady-state heat transfer property tester

Abstract

The utility model discloses a wall steady state heat transfer property tester which comprises a hot box, a test piece frame and a cold box, a metering box is arranged in the hot box, a sliding rail perpendicular to the test piece frame is arranged at the bottom of the test piece frame, the hot box and the cold box are both movably arranged on the sliding rail, and the metering box is arranged in the hot box. First sealing rings are arranged on the sides, close to the test piece frame, of the hot box and the cold box, grooves with the width smaller than that of the first sealing rings are formed in the two sides of the test piece frame, second sealing rings capable of extending into the grooves are arranged on the first sealing rings, and the first sealing rings abut against the bottoms of the grooves. The groove is formed in the test piece frame, the second sealing ring is matched with the groove, the first sealing ring is matched with the outer frame of the test piece frame, stepped sealing is achieved, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wall heat transfer measurement, in particular to a wall steady-state heat transfer property measuring instrument. Background Art

[0002] The guarded hot box method is to place the metering box in a guarded box, and establish the required temperature, wind speed and radiation conditions in the boxes on both sides of the specimen. After reaching a stable state, the air temperature, the surface temperature of the specimen and the inner wall of the box and the power input to the metering box are measured to calculate the heat transfer properties of the specimen. The devices currently used in the guarded hot box method include a hot box, a cold box and a specimen frame. First, the wall is built in the specimen frame and mortar is applied. Then, the hot box and the cold box on both sides of the specimen frame are moved toward the specimen frame so that the hot box and the cold box are sealed and pressed on both sides of the specimen frame. Then, the hot box and the cold box start heating and cooling respectively, and then the measurement can begin. During use, there may be a gap between the specimen frame and the hot box or cold box, which affects the temperature in the hot box or cold box and thus affects the measured wall heat transfer coefficient. The current solution is to set sealing rings on both sides of the specimen frame. However, after long-term use, the sealing rings affect the flatness and elasticity of the surface due to fatigue or aging. After the specimen frame and the hot box and cold box are closed, the sealing rings are not tightly matched with the hot box or cold box due to their low flatness and poor elasticity, and there is still a risk of air leakage. Utility Model Content

[0003] The purpose of the utility model is to avoid the deficiencies of the prior art and provide a wall steady-state heat transfer property measuring instrument, thereby effectively solving the deficiencies in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a wall steady-state heat transfer property measuring instrument, including a hot box, a specimen frame and a cold box, the hot box is provided with a metering box, the bottom of the specimen frame is provided with a slide rail perpendicular to the specimen frame, the hot box and the cold box are both movably arranged on the slide rail, a first sealing ring is provided on one side of the hot box and the cold box close to the specimen frame, both sides of the specimen frame are provided with grooves with a width smaller than the first sealing ring, the first sealing ring is provided with a second sealing ring that can extend into the groove, and the first sealing ring is against the bottom of the groove.

[0005] Furthermore, two third sealing rings are arranged on both sides of the specimen frame on the outer sides of the groove, and the two third sealing rings are arranged on both sides of the groove.

[0006] Furthermore, a fourth sealing ring is provided at the bottom of the groove.

[0007] Furthermore, the width of the groove is greater than the width of the second sealing ring, the width of the fourth sealing ring is greater than the width of the second sealing ring, and the interior of the fourth sealing ring is a hollow structure.

[0008] Furthermore, the outer circle of the groove is provided with a contraction edge contracting inwards.

[0009] Furthermore, the inner edge of the contraction edge is configured to be in an arc shape.

[0010] The above technical solution of the utility model has the following beneficial effects: the utility model sets a groove on the specimen frame, cooperates with the groove through the second sealing ring, and cooperates with the outer frame of the specimen frame through the first sealing ring, forming a stepped seal to improve the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the utility model;

[0012] Figure 2 It is a cross-sectional schematic diagram of a top view of an embodiment of the utility model;

[0013] Figure 3 for Figure 2 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0014] The following is a detailed description of the preferred implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0015] In the description of the present utility model, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0016] like Figure 1-3As shown, the wall steady-state heat transfer property measuring instrument of this embodiment includes a hot box 1, a test piece frame 2 and a cold box 3. A metering box 4 is arranged in the hot box 1. A slide rail 5 perpendicular to the test piece frame 2 is arranged at the bottom of the test piece frame 2. The hot box 1 and the cold box 3 are both movably arranged on the slide rail 5. A first sealing ring 6 is arranged on one side of the hot box 1 and the cold box 3 close to the test piece frame 2. A groove 7 with a width smaller than the first sealing ring 6 is opened on both sides of the test piece frame 2. A second sealing ring 8 that can extend into the groove 7 is arranged on the first sealing ring 6. The first sealing ring 6 is pressed against the groove 7. The bottom of the groove 7; in this embodiment, a moving frame is arranged at the bottom of the hot box 1 and the cold box 3, and a roller and a cylinder (not shown in the figure) for driving the moving frame to move are arranged on the moving frame; after the hot box 1 and the cold box 3 move toward the specimen frame 2 and fit together, the first sealing ring 6 is attached to the specimen frame 2 for sealing, and at the same time, the second sealing ring 8 extends into the groove 7, and the second sealing ring 8 is against the bottom of the groove 7 for sealing, and the first sealing ring 6 and the second sealing ring 8 are steppedly sealed, thereby improving the sealing effect and reducing the situation where the sealing ring is aged or fatigued and a gap is generated;

[0017] Preferably, two third sealing rings 9 are provided on both sides of the specimen frame 2 on the outside of the groove 7. The two third sealing rings 9 are provided on both sides of the groove 7. The two third sealing rings 9 can cooperate with the first sealing ring 6 at the same time. If one of the first sealing ring 6 and the third sealing ring 9 fails due to fatigue or aging, the other sealing ring can cooperate with it through elasticity to avoid gaps and improve the sealing effect.

[0018] Preferably, a fourth sealing ring 10 is provided at the bottom of the groove 7, and the second sealing ring 8 can cooperate with the fourth sealing ring 10 after extending into the groove 7. If one of the second sealing ring 8 and the fourth sealing ring 10 fails due to fatigue or aging, the other sealing ring can cooperate with it through elasticity to avoid gaps and improve the sealing effect.

[0019] Preferably, the width of the groove 7 is greater than the width of the second sealing ring 8, the width of the fourth sealing ring 10 is greater than the width of the second sealing ring 8, the interior of the fourth sealing ring 10 is a hollow structure, after the second sealing ring 8 is pressed on the fourth sealing ring 10, the air in the fourth sealing ring 10 will flow to both sides, so that the middle of the fourth sealing ring 10 becomes flat, and the two sides become larger, the two sides of the fourth sealing ring 10 can expand between the second sealing ring 8 and the groove 7, so as to be pressed on the second sealing ring 8, if the surface of the second sealing ring 8 is uneven due to fatigue or aging, the air in the fourth sealing ring 10 can make the fourth sealing ring 10 deform to cooperate with the second sealing ring 8, so as to improve the sealing performance, and the two sides of the fourth sealing ring 10 can be pressed on the side of the second sealing ring 8, so as to further improve the sealing effect;

[0020] Preferably, the outer ring of the groove 7 is provided with a shrinking edge 11 that shrinks inwardly. When the inner and outer sides of the fourth sealing ring 10 expand, the shrinking edge 11 can block the fourth sealing ring 10, so that the two sides of the fourth sealing ring 10 expand and press toward the direction of the second sealing ring 8;

[0021] Preferably, the inner edge of the contraction edge 11 is configured to be an arc shape to facilitate the insertion of the second sealing ring 8 .

[0022] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A wall steady-state heat transfer property measuring instrument, comprising a hot box, a specimen frame and a cold box, wherein a metering box is arranged in the hot box, a slide rail perpendicular to the specimen frame is arranged at the bottom of the specimen frame, and the hot box and the cold box are movably arranged on the slide rail, characterized in that: A first sealing ring is provided on one side of the hot box and the cold box close to the specimen frame, grooves with a width smaller than the first sealing ring are provided on both sides of the specimen frame, a second sealing ring which can extend into the groove is provided on the first sealing ring, and the first sealing ring is against the bottom of the groove.

2. The wall steady-state heat transfer property measuring instrument according to claim 1, characterized in that: Two third sealing rings are arranged on both sides of the test piece frame at the outer sides of the groove, and the two third sealing rings are arranged on both sides of the groove.

3. The wall steady-state heat transfer property measuring instrument according to claim 1, characterized in that: A fourth sealing ring is arranged at the bottom of the groove.

4. The wall steady-state heat transfer property measuring instrument according to claim 3, characterized in that: The width of the groove is greater than the width of the second sealing ring, the width of the fourth sealing ring is greater than the width of the second sealing ring, and the interior of the fourth sealing ring is a hollow structure.

5. The wall steady-state heat transfer property measuring instrument according to claim 4, characterized in that: The outer circle of the groove is provided with a contraction edge contracting inwards.

6. The wall steady-state heat transfer property measuring instrument according to claim 5, characterized in that: The inner edge of the contraction edge is configured to be in an arc shape.

Images