A polyurethane expansion force testing device

Abstract

The present application relates to the technical field of polyurethane testing, and discloses a polyurethane expansion force testing device, which includes a frame, a base, a test container, a power member and a push member; the upper and lower ends of the test container are connected; the base is detachably connected to the frame for placing the test container; the power member is installed on the frame and connected to the push member to drive the push member to move up and down; the push member includes a push plate and a cover plate, the push plate size is smaller than the inner cavity size of the test container and is connected to the power member, the cover plate is detachably connected to the lower part of the push plate, and the cover plate size is larger than the inner cavity size of the test container, so as to close the test container; and the frame has an abutment seat for supporting the test container. The present application can improve the convenience of taking polyurethane out of the container after the test is completed.

Description

Technical Field

[0001] The present application relates to the technical field of polyurethane testing, and in particular to a polyurethane expansion force testing device. Background Art

[0002] With the continuous development of engineering technology, polyurethane, as a new type of polymer technology, has been widely used in the engineering field, such as grouting water plugging, soil reinforcement, pipeline repair, etc.

[0003] Polyurethane materials will generate expansion force during the foaming and expansion process, and the expansion force will be converted into high-pressure gas, which may cause soil uplift or pipeline rupture. Therefore, the expansion force of polyurethane needs to be tested before construction to improve project quality and safety.

[0004] The Chinese patent document with the publication number CN216207182U discloses a polyurethane expansion force test device, which includes a lifting and counter-pressure system and a test system. The lifting and counter-pressure system lifts the test system by a jack so that the cylinder in the test system is closed by a flange, and the test system has a pressure sensor to capture the expansion pressure change of the polyurethane material.

[0005] However, the polyurethane material will exert pressure on the cylinder wall after it expands in the cylinder, making it difficult to remove the expanded polyurethane from the cylinder after the test is completed. Utility Model Content

[0006] In order to improve the convenience of taking out polyurethane from a container after the test is completed, the present application provides a polyurethane expansion force testing device.

[0007] The present application provides a polyurethane expansion force testing device, which adopts the following technical solution:

[0008] A polyurethane expansion force testing device comprises: a frame, a base, a test container, a power piece and a push piece; the upper and lower ends of the test container are connected; the base is detachably connected to the frame for placing the test container; the power piece is installed on the frame and connected to the push piece to drive the push piece to move up and down;

[0009] The pushing member includes a pushing plate and a cover plate. The pushing plate is smaller than the inner cavity of the test container and is connected to the power member. The cover plate is detachably connected to the lower part of the pushing plate, and the cover plate is larger than the inner cavity of the test container to close the test container. The frame is provided with an abutment seat for supporting the test container.

[0010] By adopting the above technical solution, during the test, the push plate and the base are used to seal the test container together, so that the polyurethane foams and expands in the test container, generating expansion force, and the change of expansion force is recorded by the relevant sensor. After the test is completed, the cover plate is removed, and the push plate can be pushed into the test container to eject the polyurethane after the reaction.

[0011] Optionally, a stop portion is provided on an outer wall of the test container and is used to be opposite to the abutment seat; when the test container is supported by the base, a movable gap exists between the stop portion and the abutment seat.

[0012] By adopting the above technical solution, there is a certain movable gap between the stopper and the abutment seat, so that the cover plate can push the test container to abut against the base.

[0013] Optionally, the stop portion extends toward the abutment seat and has a limiting rod that moves up and down in the abutment seat.

[0014] By adopting the above technical solution, the limiting rod guides the movement of the test container.

[0015] Optionally, the cover plate is magnetically attracted to the lower surface of the push plate.

[0016] By adopting the above technical solution, the cover plate is magnetically attracted to the lower surface of the push plate. This connection method is convenient and fast, and can be easily separated when needed, thereby improving the test efficiency.

[0017] Optionally, the cover plate has a guide portion protruding from the upper surface of the cover plate, and the lower surface of the push plate has a guide groove for the guide portion to be inserted into.

[0018] By adopting the above technical solution, the guide part on the cover plate cooperates with the guide groove on the lower surface of the push plate to ensure accurate docking between the cover plate and the push plate, further improving the accuracy and reliability of the test device.

[0019] Optionally, the base includes a main board, a sub-board and an adjustment mechanism; the sub-boards include two groups, and both groups of sub-boards are movable in the main board; the adjustment mechanism is installed on the main board, and is used to drive the ends of the two groups of sub-boards that are away from each other to extend out of the opposite sides of the main board respectively, or drive the two groups of sub-boards to be stored in the main board;

[0020] The rack is provided with a clearance cavity for placing the main board, and the rack is provided with slots for inserting the sub-board on opposite sides of the clearance cavity.

[0021] By adopting the above technical solution, the position of the sub-board is adjusted by the adjusting mechanism so that the sub-board can be inserted into or removed from the slot, thereby realizing the disassembly and assembly of the base.

[0022] Optionally, the adjustment mechanism includes an adjustment column and a reset elastic member, the adjustment column is threadedly movable on the main board along a direction perpendicular to the main board surface, and the adjustment column is located between the two groups of sub-boards; the side of the sub-board close to the adjustment column has an inclined surface that abuts against the end of the adjustment column;

[0023] The resetting elastic member acts on the auxiliary plate to give the auxiliary plate an elastic force to move into the main plate.

[0024] By adopting the above technical solution, the adjusting column cooperates with the inclined surface to push the sub-plate to move when the thread moves, and the elastic force of the resetting elastic member can drive the sub-plate to reset into the main board.

[0025] Optionally, the base has a first groove for inserting the test container.

[0026] By adopting the above technical solution, the first groove on the base provides a stable placement space for the test container.

[0027] Optionally, the cover plate has a second groove for inserting the test container.

[0028] By adopting the above technical solution, the second groove on the cover plate cooperates with the test container, thereby further enhancing the stability of the test container.

[0029] Optionally, a pressure sensor is installed on the cover plate.

[0030] By adopting the above technical solution and installing a pressure sensor on the cover plate, the expansion pressure changes of the polyurethane material can be captured in real time, providing accurate data support for the test.

[0031] In summary, the present application includes at least one of the following beneficial effects:

[0032] 1. In the present application, the test container is covered by a cover plate during the test, and the expanded polyurethane in the test container is pushed out by a push plate after the test, so as to improve the convenience of taking out the polyurethane from the container after the test is completed;

[0033] 2. The cover is magnetically attached to the lower surface of the push plate, which facilitates the installation and removal of the cover and the push plate, and also facilitates the replacement of the cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0035] Figure 2 is a schematic diagram of the explosion structure of the test and push piece in the embodiment of the present application;

[0036] Figure 3is a schematic diagram of the explosion structure of the cover plate, the test container and the base in the embodiment of the present application;

[0037] Figure 4 is a schematic diagram of the exploded structure of the frame and the base in the embodiment of the present application;

[0038] Figure 5 yes Figure 4 Cross-section view at AA in the middle.

[0039] Explanation of the reference numerals in the accompanying drawings: 1. frame; 2. base; 21. main board; 22. sub-board; 23. adjustment mechanism; 231. adjustment column; 232. reset elastic member; 2321. moving block; 2322. spring; 3. test container; 4. power member; 5. pushing member; 51. pushing plate; 52. cover plate; 6. abutment seat; 7. stopper; 8. limiting rod; 9. guide part; 10. guide groove; 11. give way cavity; 12. slot; 13. inclined surface; 14. first groove; 15. second groove; 16. pressure sensor; 17. moving groove. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-5 This application is described in further detail.

[0041] The present application embodiment discloses a polyurethane expansion force testing device. Figure 1 The polyurethane expansion force testing device includes a frame 1, a base 2, a testing container 3, a power member 4, a pushing member 5 and a pressure sensor 16.

[0042] Reference Figure 2 The test container 3 is in the shape of a tube with upper and lower ends connected. In this embodiment, the test container 3 is in the shape of a cylinder. In other embodiments, the test container 3 can also be in the shape of a square tube.

[0043] Reference Figure 1 and Figure 2 The base 2 is a square plate-shaped structure, and a clearance cavity 11 for the base 2 is formed on the frame 1. The base 2 can be detachably connected to the clearance cavity 11 of the frame 1. When the base 2 is installed on the frame 1, the base 2 is used to place the test container 3 to seal the bottom end of the test container 3.

[0044] The frame 1 also has a portion mounted above the base 2, and the power member 4 is mounted on this portion of the frame 1. In this embodiment, the power member 4 is an electric telescopic rod, the base of which is mounted on the frame 1, and the telescopic end of the electric telescopic rod extends vertically and toward the base 2.

[0045] Reference Figure 1 and Figure 2, the pushing member 5 is installed on the telescopic end of the electric telescopic rod so that the electric telescopic rod can drive the pushing member 5 to move up and down. Specifically, the pushing member 5 includes a push plate 51 and a cover plate 52. The push plate 51 and the cover plate 52 are both disc-shaped with their axes extending vertically, and the outer diameter of the push plate 51 is smaller than the inner diameter of the test container 3, and the outer diameter of the cover plate 52 is larger than the inner diameter of the test container 3. The upper surface of the push plate 51 is connected to the telescopic end of the electric telescopic rod, and the cover plate 52 is coaxially and detachably connected to the lower surface of the push plate 51. In this embodiment, magnets are embedded in the cover plate 52 and the push plate 51, and the cover plate 52 is connected to the push plate 51 by magnetic attraction; in other embodiments, the cover plate 52 can also be installed on the push plate 51 by bolts.

[0046] The pressure sensor 16 is installed on the cover plate 52 by means of threads. When the cover plate 52 is connected to the push plate 51 , the pressure sensor 16 does not interfere with the push plate 51 .

[0047] In addition, the rack 1 is fixed with abutment seats 6 on two opposite sides thereof, and the test container 3 is provided with stopper portions 7 protruding from the outer walls on two opposite sides thereof. The stopper portions 7 are block-shaped and correspond one-to-one with the abutment seats 6. When the test container 3 is placed on the base 2, the test container 3 is located between the abutment seats 6 on both sides of the rack 1, and the stopper portions 7 on the test container 3 are located directly above the abutment seats 6. Therefore, after the base 2 is removed from the rack 1, the test container 3 can be placed on the rack 1 by abutting against the abutment seats 6 through the stopper portions 7.

[0048] Reference Figure 1 and Figure 2 When testing the expansion force of polyurethane, the cover plate 52 is magnetically attracted to the push plate 51, and the base 2 is installed on the frame 1. Then the test container 3 is placed on the base 2, and the reaction raw materials are poured into the test container 3. Then, the telescopic end of the electric telescopic rod is extended downward for a certain distance, driving the cover plate 52 to move downward until it is tightly pressed against the top of the test container 3, so that the cover plate 52 and the base 2 together seal the inner cavity of the test container 3, and the sensing end of the pressure sensor 16 is connected to the inner cavity of the test container 3, so that the polyurethane will transfer the pressure to the pressure sensor 16 when it expands in the test container 3. And when the container is placed on the base 2, there is a movable gap between the abutment seat 6 and the stopper 7, so that when the cover plate 52 presses down the test container 3, it can drive the test container 3 to press down against the base 2.

[0049] After the polyurethane expansion force test is completed, the base 2 is removed from the frame 1, and the test container 3 falls until the stopper 7 abuts against the abutment seat 6. Then the cover plate 52 is removed from the push plate 51, so that the push plate 51 is opposite to the inner cavity of the test container 3. Then, the electric telescopic rod is further extended downward, so that the push plate 51 extends into the inner cavity of the test container 3 to push out the reacted polyurethane, so that the reacted polyurethane falls into the yield cavity 11. In order to improve the smoothness of the material removal, a release agent is pre-coated on the inner wall of the test container 3.

[0050] Reference Figure 1 and Figure 2 In order to improve the stability of the test container 3 during the downward movement, a vertically extending limit rod 8 is fixed on the stop portion 7, and a limit groove for the limit rod 8 to slide up and down is opened on the abutment seat 6 to improve the stability of the displacement of the test container 3.

[0051] Reference Figure 2 and Figure 3 In order to improve the stability of the cover plate 52, a guide portion 9 protruding from the upper surface of the cover plate 52 is integrally formed at the center of the upper surface of the cover plate 52, and the guide portion 9 is cylindrical. A guide groove 10 for coaxial insertion of the guide portion 9 is provided on the lower surface of the push plate 51, so that the cover plate 52 and the push plate 51 always maintain a coaxial state when connected.

[0052] Reference Figure 2 and Figure 3 Furthermore, a first groove 14 is formed on the upper surface of the base 2 for the bottom of the test container 3 to be inserted into, and a second groove 15 is formed on the lower surface of the cover 52 for the top of the test container 3 to be inserted into, so as to improve the sealing and stability between the base 2 and the test container 3 and between the cover 52 and the test container 3.

[0053] Reference Figure 4 and Figure 5 In addition, regarding the connection between the base 2 and the frame 1, in this embodiment, the base 2 includes a main board 21, a sub-board 22, and an adjustment mechanism 23. The main board 21 is in the shape of a square plate, and the sub-board 22 has two also in the shape of square plates. The two sub-boards 22 move in the main board 21 in the direction of approaching or moving away from each other, and a movable cavity for the sub-boards 22 to move is provided on the main board 21. The board surfaces of the sub-boards 22 are parallel to the board surface of the main board 21, and the two sub-boards 22 can be moved to be completely recovered in the main board 21, or moved to the ends of the two sub-boards 22 that are away from each other and extend out of the opposite sides of the main board 21.

[0054] The first groove 14 is formed on the upper surface of the main board 21, and the adjusting mechanism 23 is used to adjust the distance that the sub-board 22 extends from the main board 21, and the sub-board 22 and the adjusting mechanism 23 do not interfere with the first groove 14. Specifically, the adjusting mechanism 23 includes an adjusting column 231 and a reset elastic member 232.

[0055] The adjusting column 231 is in the shape of a screw, and the top end of the adjusting column 231 is threaded vertically upward from the lower surface of the main board 21 to the movable cavity, and the bottom end of the adjusting column 231 is located on the outer side of the lower part of the main board 21 and has a handle. The top end of the adjusting column 231 is located between the sides of the two sub-plates 22 that are close to each other, and the sides of the two sub-plates 22 that are close to each other have an inclined surface 13 facing the adjusting column 231, and the inclined surface 13 gradually tilts downward in a direction away from the adjusting column 231, and the sub-plate 22 is against the top end of the adjusting column 231 through the inclined surface 13. When the adjusting column 231 moves upward with a thread, the two sub-plates 22 can be driven to move in a direction away from each other through the guidance of the inclined surface 13.

[0056] The resetting elastic member 232 corresponds to the sub-plate 22 one by one, and each resetting elastic member 232 includes a moving block 2321 and a spring 2322. The moving block 2321 is fixed to the lower surface of the sub-plate 22, and a moving groove 17 is provided in the main plate 21 for the moving block 2321 to slide along the moving direction of the sub-rod. The spring 2322 is installed in the moving groove 17. The opposite sides of the spring 2322 are respectively connected to the main plate 21 and the moving block 2321 to give the moving block 2321 an elastic force to move toward the adjustment column 231. Therefore, when the adjustment column 231 moves downwardly in a threaded manner, the spring 2322 drives the two sub-plates 22 to move into the main plate 21, so that the sub-plates 22 can be completely retracted into the main plate 21.

[0057] The distance between the inner walls of the rack 1 on both sides of the clearance cavity 11 is consistent with the width of the main board 21, and the rack 1 is provided with slots 12 on the inner walls of the two sides of the clearance cavity 11. The size of the slots 12 is adapted to the longitudinal section size of the sub-board 22, so that the sub-board 22 can be inserted horizontally. When the sub-board 22 is completely received in the main board 21, the main board 21 can be placed in the clearance cavity 11 of the rack 1 and the sub-board is opposite to the slots 12. Then, the sub-board 22 is driven to move by moving the adjustment column 231 upward with a thread, so that the sub-board is plugged into the corresponding slot 12 to complete the installation.

[0058] The implementation principle of the polyurethane expansion force testing device of the embodiment of the present application is as follows: during the test, the base 2 and the cover plate 52 jointly seal and clamp the test container 3, and the polyurethane reacts in the test container 3. After the test is completed, the cover plate 52 and the base 2 are removed, the test container 3 is supported by the abutment seat 6, and the telescopic end of the electric telescopic rod drives the push plate 51 to move downward to push the reacted polyurethane in the test container 3 out of the test container 3.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A polyurethane expansion force testing device, characterized in that: include: A frame (1), a base (2), a test container (3), a power piece (4) and a push piece (5); the test container (3) is connected at both ends; the base (2) is detachably connected to the frame (1) for placing the test container (3); the power piece (4) is mounted on the frame (1) and connected to the push piece (5) to drive the push piece (5) to move up and down; The pushing member (5) comprises a pushing plate (51) and a cover plate (52); the pushing plate (51) is smaller than the inner cavity of the test container (3) and is connected to the power member (4); the cover plate (52) is detachably connected to the lower part of the pushing plate (51) and is larger than the inner cavity of the test container (3) so as to close the test container (3); and the frame (1) is provided with an abutment seat (6) for supporting the test container (3).

2. A polyurethane expansion force testing device according to claim 1, characterized in that: The outer wall of the test container (3) is provided with a stop portion (7) for being opposite to the abutment seat (6); when the test container (3) is supported by the base (2), a movable gap exists between the stop portion (7) and the abutment seat (6).

3. A polyurethane expansion force testing device according to claim 2, characterized in that: The stopper portion (7) is provided with a limiting rod (8) extending in a direction close to the abutment seat (6) and moving up and down in the abutment seat (6).

4. A polyurethane expansion force testing device according to claim 1, characterized in that: The cover plate (52) is magnetically attracted to the lower surface of the push plate (51).

5. A polyurethane expansion force testing device according to claim 4, characterized in that: The cover plate (52) has a guide portion (9) protruding from the upper surface of the cover plate (52), and the lower surface of the push plate (51) has a guide groove (10) for the guide portion (9) to be inserted into.

6. A polyurethane expansion force testing device according to claim 1, characterized in that: The base (2) comprises a main board (21), a sub-board (22) and an adjustment mechanism (23); the sub-boards (22) have two groups, and the two groups of sub-boards (22) are movable in the main board (21); the adjustment mechanism (23) is mounted on the main board (21) and is used to drive the ends of the two groups of sub-boards (22) that are away from each other to extend out of opposite sides of the main board (21), or to drive the two groups of sub-boards (22) to be stored in the main board (21); The rack (1) has a clearance cavity (11) for placing the main board (21), and the rack (1) is provided with slots (12) for inserting the sub-board (22) on opposite sides of the clearance cavity (11).

7. A polyurethane expansion force testing device according to claim 6, characterized in that: The adjustment mechanism (23) comprises an adjustment column (231) and a reset elastic member (232); the adjustment column (231) is threadedly movable on the main board (21) in a direction perpendicular to the board surface of the main board (21), and the adjustment column (231) is located between the two groups of sub-boards (22); a side of the sub-board (22) close to the adjustment column (231) has an inclined surface (13) that abuts against an end of the adjustment column (231); The resetting elastic member (232) acts on the auxiliary plate (22) to impart an elastic force to the auxiliary plate (22) to move into the main plate (21).

8. A polyurethane expansion force testing device according to claim 1, characterized in that: The base (2) has a first groove (14) for the test container (3) to be inserted into.

9. A polyurethane expansion force testing device according to claim 1, characterized in that: The cover plate (52) has a second groove (15) for the test container (3) to be inserted into.

10. A polyurethane expansion force testing device according to claim 1, characterized in that: A pressure sensor (16) is mounted on the cover plate (52).

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