CN216207182U - Polyurethane expansibility testing arrangement - Google Patents
Polyurethane expansibility testing arrangement Download PDFInfo
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- CN216207182U CN216207182U CN202122760568.1U CN202122760568U CN216207182U CN 216207182 U CN216207182 U CN 216207182U CN 202122760568 U CN202122760568 U CN 202122760568U CN 216207182 U CN216207182 U CN 216207182U
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Abstract
The utility model discloses a polyurethane expansive force testing device which is used for measuring the expansive force during the reaction of a polyurethane grouting material. The jacking counter-pressure system is used for jacking the lifting base platform and the test system by using a jack and providing vertical pressure for the test system; the testing system comprises a cylindrical cavity and a pressure sensor, the top surface and the bottom surface of the cylindrical cavity are fixed by flange clamping grooves, the axial section of the inner wall is in a two-layer step shape, a partition plate is arranged at the step, and a pressure head of the pressure sensor is connected to the partition plate and used for capturing expansion pressure change of the polyurethane material. The device is simple to mount and dismount and long in service life; the sealing performance is good, and the air pressure and the contact pressure generated when the polyurethane is foamed can be measured simultaneously; the measuring range is wide, the precision is high, and the testing requirements of most polyurethane materials can be met.
Description
Technical Field
The utility model relates to the technical field of expansion force testing, in particular to a polyurethane expansion force testing device.
Background
Polyurethane as a novel polymer material has good fluidity, cohesiveness and excellent water plugging and impermeability, and is widely applied in the fields of grouting water plugging, soil body reinforcement, pipeline repair and the like in the last two decades. Polyurethane which is commonly used in engineering is mostly in the form of A, B materials, the A, B materials are mixed and then injected into a soil body or a pipeline to be repaired, the polyurethane material is foamed and expanded rapidly to fill gaps of the soil body or cracks of the pipeline, and the purposes of water plugging, soil body reinforcement, pipeline repair and the like are achieved. Because the polyurethane material has high expansion force when being foamed and generates high-pressure gas in a closed space, the soil body can be raised or the pipeline can be cracked. Therefore, before construction, the expansion force of the polyurethane material needs to be tested to calculate the grouting amount. However, the research on the polyurethane expansion force in China is very little, and the existing expansion force testing device is complex in structure and difficult to disassemble. Therefore, the expansion force testing device which is simple in structure, high in measuring range and high in precision and can effectively measure the air pressure and the contact pressure during polyurethane foaming is designed.
Disclosure of Invention
The utility model aims to provide a polyurethane expansion force testing device, which is used for solving the problems in the prior art.
In order to achieve the purpose, the technical scheme of the utility model is that
The utility model provides a polyurethane expansibility testing arrangement, includes jacking back pressure system, test system, jacking back pressure system comprises jack, fixed base station, activity base station, the jack passes through bolted connection on fixed base station, the top termination of jack touches activity base station, test system comprises bottom ring flange, drum type cavity, top ring flange, pressure sensor, the bottom ring flange uses the bolt fastening on the activity base station, drum type cavity top surface and bottom surface are fixed by the ring flange draw-in groove, and inner wall axial cross-section is two-layer step form, and step department is equipped with the baffle, has connect the pressure sensor pressure head on the baffle, the top ring flange passes through the pressure head to be fixed in the middle of pressure head and pressure sensor, the sensor passes through the recess and links to each other with the pressure-bearing roof.
The utility model is further improved in that the jack is connected with the fixed base station through a bolt.
The utility model is further improved in that the bottom flange is connected with the movable base through bolts.
The utility model is further improved in that the top flange and the bottom flange are connected with the cylindrical cavity through clamping grooves, and sealing rings are arranged in the clamping grooves of the bottom flange.
The utility model is further improved in that the axial section of the cylindrical cavity is step-shaped, and a DHS-shaped sealing ring is assembled at the step.
The utility model is further improved in that a clapboard is arranged in the DHS sealing ring and is in parallel contact with the pressure head.
The utility model has the further improvement that the pressure sensor is connected with the pressure head through a threaded pipe, the top flange plate is connected with the pressure sensor through a bolt, and the top flange plate is fixed between the pressure sensor and the pressure head.
The utility model is further improved in that the pressure sensor is arranged outside the cylindrical cavity and is fixed between the top flange plate and the pressure-bearing top plate through the groove.
The utility model is further improved in that the pressure sensor is connected with a high-precision instrument panel.
The utility model has the following advantages:
according to the utility model, the jacking back-pressure system and the test system are arranged, when the jacking back-pressure system jacks through the jack, the movable base platform and the test system are driven to ascend, and the pressure-bearing top plate is contacted with the longitudinal pressure-bearing plate, so that axial pressure is provided for the test system. The testing system is provided with a cylindrical cavity with a stepped axial section, the top surface and the bottom surface of the cylindrical cavity are connected with the clamping grooves of the bottom flange plate and the top flange plate, and the axial pressure provided by the jacking back-pressure system is fixed. The pressure sensor is connected with the pressure head through a threaded pipe, and the expansion pressure is captured by the pressure sensor through the pressure head and displayed in the high-precision instrument panel.
Furthermore, an O-shaped sealing ring is arranged in a clamping groove of the bottom flange plate, and a DHS-shaped sealing ring is arranged at the step of the cylindrical cavity, so that gas leakage when polyurethane is foamed in the cylindrical cavity is avoided, and the tightness of the testing system is ensured.
Furthermore, a partition plate is arranged in the DHS-shaped sealing ring, so that the partition plate is in parallel contact with the pressure head. When the polyurethane is foamed in the cylindrical cavity, the gas pressure and the contact pressure can be transmitted to the pressure head through the partition plate, so that the pressure head is prevented from being in direct contact with the polyurethane, and the service life of the pressure head is prolonged.
Furthermore, the upper surface of the bottom flange plate, the inner side of the cylindrical cavity, the partition plate and the surface of the DHS sealing ring are coated with a release agent, so that the cleaning equipment can be conveniently detached after the test is finished.
Furthermore, the top flange plate and the bottom flange plate can be connected through bolts, when the expansion pressure is low, a jacking back pressure system is not needed, axial pressure is provided by the bolts between the top flange plate and the bottom flange plate, the cylindrical cavity is fixed, and the purpose of simplifying the test process is achieved.
Further, the pressure sensor is arranged outside the cylindrical cavity, and pressure changes are captured through a pressure head in the cavity.
Drawings
FIG. 1 is a schematic view of an overall polyurethane expansion force testing device.
FIG. 2 is a schematic longitudinal sectional view of a cylindrical cavity, a top flange, and a pressure sensor.
Fig. 3, schematic view of the bottom flange.
Fig. 4, top surface schematic view of the top flange.
Fig. 5, schematic view of the lower surface of the top flange.
Detailed Description
The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
Example 1
The jacking counter-pressure system comprises a jacking counter-pressure system and a testing system, wherein a jack 1 is connected with a fixed base station 2 through a bolt, the top end of the jack 1 is in contact with a movable base station 3, the movable base station 3 can be driven to move upwards when the jack 1 is jacked, and when a pressure-bearing top plate 8 at the top of the testing system is in contact with a longitudinal pressure-bearing plate 9, axial counter-pressure can be provided for the whole testing system.
Example 2
The bottom of the test system is provided with a bottom flange 5 which is fixedly connected on the movable base station 3 through bolts, a clamping groove 14 is arranged on the bottom flange, an O-shaped sealing ring is arranged in the clamping groove 14, and the cylindrical cavity 4 is fixed between the top flange 6 and the bottom flange 5 through the clamping groove 14; the section of the cylindrical cavity 4 is arranged in a step shape, a DHS-shaped sealing ring 13 is arranged at the step, a partition plate 12 and a pressure head 11 are arranged in the sealing ring 13, and the partition plate 12 and the pressure head 13 are in parallel contact, so that the expansion force generated in the polyurethane foaming process can be transmitted to the pressure head 11 through the partition plate 12; the pressure head 12 is connected with the pressure sensor 7 through a threaded pipe, the length of the pressure head 2 extending into the cylindrical cavity 4 is adjustable, and the expansion force in the polyurethane foaming process can be effectively captured by the pressure sensor 7; the top flange 6 is fixed in the middle by a pressure head 11 and a pressure sensor 7, the pressure sensor 7 is arranged outside the cylindrical cavity 4, the top surface is provided with a pressure-bearing top plate 8, and the pressure sensor 7 is fixed in the middle by the top flange 6 and the pressure-bearing top plate 9 through a groove.
Example 3
When the polyurethane reaction speed is high, the testing device can be installed in advance, the jack 1 is used for jacking the movable base station 3 and the testing system, grouting is carried out through the grouting holes 10 after the pressure-bearing top plate 8 is in contact with the longitudinal pressure-bearing plate 9, and the grouting holes 10 are closed after grouting is finished.
Example 4
When the polyurethane reaction is slow and no grouting condition exists, a pressure head 11 of a partition plate 12 can be installed in a DHS-shaped sealing ring 13, a top flange 6 is fixed between the pressure head 11 and a pressure sensor 7, the length of the pressure head 11 extending into a cylindrical cavity 4 is adjusted in advance, instruments such as the pressure sensor are taken out, the polyurethane is poured into the cavity from the top surface of the cylindrical cavity 4, the cylindrical cavity 4 is closed rapidly, after a pressure-bearing top plate 8 is in pressure contact with a longitudinal pressure-bearing plate 9 by lifting a jack 1, the index of an instrument panel is reset, the polyurethane is injected from a grouting hole, and the expansion force is recorded.
Example 5
The top flange 6 can be connected with the bottom flange through the bolt holes 15, and when the expansion force is small, a jacking back-pressure system can be omitted, so that the axial pressure is provided for the test system.
Example 6
The working process of the utility model is as follows:
firstly, a polyurethane release agent is coated on the inner sides of the top flange 6 and the bottom flange 5, the inner wall of the cylindrical cavity 4, the pressure head 11, the DHS-shaped sealing ring 13 and the outer surface of the partition plate 12, so that the polyurethane foam can be taken out after the test is finished, and equipment can be cleaned conveniently.
Secondly, fixing the bottom flange 5 on the movable base platform, installing an O-shaped sealing ring in a clamping groove 14 of the bottom flange 5, installing the cylindrical cavity 4 in the clamping groove 14, installing a DHS-shaped sealing ring 13 at the step of the cylindrical cavity, and installing the partition plate 12 in the DHS-shaped sealing ring 13.
Linking to each other pressure sensor 7 and high accuracy panel board, making the registration zero clearing on the panel board, putting top ring flange 6 between pressure head 11 and pressure sensor 7, screw into pressure sensor 7 with the screwed pipe on the pressure head 11, show the degree of depth that pressure adjustment pressure head 11 visited into cylindrical cavity through the panel board, when making pressure head 11 just good contact with baffle 12, cylindrical cavity 4's top surface also is fixed in the draw-in groove 15 of top ring flange, installation pressure-bearing roof.
And fourthly, lifting the jack 1, when the pressure value in the instrument panel begins to change, indicating that the pressure bearing top plate 8 and the longitudinal pressure bearing plate 9 are in pressure contact, and resetting the reading of the instrument panel.
And fifthly, after the metered polyurethane is injected from the grouting hole 10, stopping grouting, closing a valve of the grouting hole, and recording the pressure value change of the instrument panel.
After the test is finished, the test data are arranged, after polyurethane is hardened, the oil valve of the jack 1 is loosened, the movable base station 3 and the test system descend, the bottom flange 5 and the top flange 6 are disassembled, after polyurethane foam is taken out of the cylindrical cavity 4, the inner sides of the top flange 6 and the bottom flange 5, the inner wall of the cylindrical cavity 4, the pressure head 11, the DHS type sealing ring 13 and the outer surface of the partition plate 12 are cleaned by absolute ethyl alcohol.
Seventhly, according to the requirements, the test steps are repeated, each group of tests are repeated for five times, and the obtained expansion force is averaged by five values.
In order to make convenient operation among the polyurethane expansibility test process, the test is accurate, and this testing arrangement can effectively must avoid revealing of thick liquid and reaction gas, the difficult problem of sample is dismantled to equipment, still to expansibility size and experimental condition, respectively has proposed two kinds of alternative test schemes simultaneously, has improved different polyurethane material expansibility test suitability greatly.
Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.
Claims (8)
1. The utility model provides a polyurethane expansibility testing arrangement, includes jacking back pressure system, test system, its characterized in that: the jacking back-pressure system consists of a jack (1), a fixed base platform (2) and a movable base platform (3), the jack (1) is connected on the fixed base station (2) through a bolt, the upper end of the jack is contacted with the movable base station (3), the test system consists of a bottom flange plate (5), a cylindrical cavity (4), a top flange plate (6) and a pressure sensor (7), the bottom flange plate (5) is fixed on the movable base platform (3) by bolts, the top surface and the bottom surface of the cylindrical cavity (4) are fixed by a flange clamping groove (14), the axial section of the inner wall is in a two-layer step shape, a partition plate (12) is arranged at the step position and is connected with a pressure head (11) of a pressure sensor, the top flange plate (6) is fixed between a pressure head (11) and a pressure sensor (7) through a pressure head threaded pipe, and the sensor (7) is connected with a pressure-bearing top plate (8) through a groove.
2. The polyurethane expansion force testing device of claim 1, wherein: when the jack (1) is jacked up, the movable base platform (3) and the test system are driven to rise, and the pressure bearing top plate (8) is contacted with the longitudinal pressure bearing plate (9) to provide axial pressure for the test system.
3. The polyurethane expansion force testing device of claim 2, wherein: the jack (1) is connected with the fixed base station (2) through bolts, and the bottom flange plate (5) is connected with the movable base station through bolts.
4. The polyurethane expansion force testing device of claim 1, wherein: the top flange plate (6) and the bottom flange plate (5) are connected with the cylindrical cavity (4) through clamping grooves (14), and sealing rings are installed in the clamping grooves (14) of the bottom flange plates.
5. The polyurethane expansion force testing device of claim 1, wherein: the axial section of the cylindrical cavity (4) is step-shaped, and a DHS-shaped sealing ring (13) is assembled at the step.
6. The polyurethane expansion force testing device of claim 1, wherein: a partition plate (12) is arranged in the DHS sealing ring (13), and the partition plate (12) is in parallel contact with the pressure head (11).
7. The polyurethane expansion force testing device of claim 1, wherein: the pressure sensor (7) is connected with the pressure head (11) through a threaded pipe, the top flange plate (6) is connected with the pressure sensor (7) through a bolt, and the top flange plate (6) is fixed between the pressure sensor (7) and the pressure head (11).
8. The polyurethane expansion force testing device of claim 1, wherein: the pressure sensor (7) is arranged outside the cylindrical cavity (4) and is fixed between the top flange plate (6) and the pressure-bearing top plate (8) through a groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122760568.1U CN216207182U (en) | 2021-11-11 | 2021-11-11 | Polyurethane expansibility testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122760568.1U CN216207182U (en) | 2021-11-11 | 2021-11-11 | Polyurethane expansibility testing arrangement |
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| Publication Number | Publication Date |
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| CN216207182U true CN216207182U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122760568.1U Active CN216207182U (en) | 2021-11-11 | 2021-11-11 | Polyurethane expansibility testing arrangement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117929193A (en) * | 2024-03-25 | 2024-04-26 | 中国电子科技集团公司第二十九研究所 | Device and method for accurately measuring foaming expansion force of antenna package |
| CN117929193B (en) * | 2024-03-25 | 2024-06-07 | 中国电子科技集团公司第二十九研究所 | Device and method for accurately measuring foaming expansion force of antenna package |
-
2021
- 2021-11-11 CN CN202122760568.1U patent/CN216207182U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117929193A (en) * | 2024-03-25 | 2024-04-26 | 中国电子科技集团公司第二十九研究所 | Device and method for accurately measuring foaming expansion force of antenna package |
| CN117929193B (en) * | 2024-03-25 | 2024-06-07 | 中国电子科技集团公司第二十九研究所 | Device and method for accurately measuring foaming expansion force of antenna package |
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