A concrete impermeability test mold

Abstract

The present invention belongs to the field of concrete test block preparation, and specifically relates to a concrete anti-seepage test mold, which includes a bottom cover, a mold tube, at least two scrapers and guide members corresponding to the scrapers one by one; the bottom cover includes a bottom plate plugged with the mold tube and multiple handrail outer tubes, and the mold tube is provided with multiple connectors; the scraper includes an arc plate body and a sliding sleeve coaxial with the handrail outer tube, each arc plate body can enclose an outer circle not less than the mold tube mouth, and the sliding sleeve can rotate and slide up and down in the handrail outer tube; the handrail outer tube and the connector are guided and slidably matched in the up and down directions, and a pusher is provided between the handrail outer tube and the corresponding connector, and the pusher has a telescopic part that can be telescoped in the up and down directions; the guide member is matched with the sliding sleeve to stop rotation and is slidably assembled in the up and down directions. The present invention can solve the technical problem that the existing test mold device is easy to cause damage to the test block during the demoulding process.

Description

Technical Field

[0001] The invention belongs to the field of concrete test block preparation, and in particular relates to a concrete anti-seepage test mold. Background Art

[0002] Concrete test blocks refer to concrete test samples that are cast in a certain way and cured in a specific way, and are used to test the concrete's impermeability and compressive properties. They are divided into concrete impermeability test blocks and concrete compressive test blocks. Among them, concrete impermeability test blocks are made from concrete impermeability test molds, and test the concrete's impermeability, mainly including cement paste volume, water-cement ratio, water permeability determination, osmotic pressure strength, etc.

[0003] When preparing concrete impermeability test blocks, you need to first pour the mixed concrete into the concrete impermeability test mold, and then place the concrete impermeability test mold on a vibration plate. Vibrate the concrete in the test mold to make it tightly combined, and then use a scraper to scrape off the excess concrete on the top of the test mold. After the test block solidifies, turn the test mold over and buckle it in a suitable position. An air pump injects high-pressure air into the test mold through the reserved holes on the test mold to separate the test block and the test mold, thereby completing the demolding of the test block. However, this demoulding method using air pump has the following defects: first, a reserved hole needs to be opened at the bottom of the test mold for the air pump to inject high-pressure air into the test mold. Before concrete is poured into the anti-seepage test mold, the reserved hole needs to be covered with paper to prevent leakage. Even so, leakage of the test mold is still relatively common in actual operation; second, when pouring concrete and vibrating on the vibration plate, the concrete will spill out of the test mold, requiring an additional cleaning process and consuming manpower; third, during demoulding, the high-pressure air injected by the air pump cannot stably push out the test block, and there is a lack of axial support when the test mold is manually lifted, so the test mold may collide with the test block, resulting in damage to the surface of the test block, affecting the test results of the test block's anti-seepage performance.

[0004] In addition to the demoulding method using the air pump method, there are also demoulding methods using the test block's own weight and manual knocking demoulding methods in the prior art. The patent application document with application publication number CN112903405A discloses a simple demoulding device and demoulding method for concrete test blocks based on gravity, which includes a base and first, second, third, and fourth slide rail units fixed on the base and arranged in parallel, each slide rail unit is movably connected with a vertical support rod unit, each vertical support rod unit is sleeved with a circular stopper, and each circular stopper is connected by a first spring. However, this method is affected by the strength of the adhesion between the concrete and the inner wall of the test mold and the smoothness of the inner wall of the test mold. It is easy for the test block to not fall down under the action of its own weight when the test mold is inverted, and when demoulding by the self-weight method, it is necessary to suspend the test mold and set a sponge pad under the test mold to ensure that the test mold is not easily damaged when it falls, which is also affected by the suspension height of the test mold and the performance of the sponge pad.

[0005] There is also a manual knocking demolding method in the prior art. A Chinese patent document with authorization announcement number CN210999261U discloses a concrete waterproof test mold that is easy to demold, which includes a bottom plate, a test mold side wall arranged at the upper end of the bottom plate, and a connecting plate arranged at the upper end of the test mold side wall; a support leg is arranged at the lower end of the bottom plate, and a support plate is overlapped on the upper part; a connecting rod is connected to the bottom end of the support plate, and the connecting rod passes through the bottom plate downward and is detachably connected to a load-bearing plate, and a sleeve is arranged on the outer side of the connecting rod; a plurality of support columns are detachably connected to the top of the connecting plate. However, there is a gap between the support plate and the bottom plate of this concrete anti-seepage test mold. When concrete slurry is poured into the test mold, the concrete slurry easily penetrates into the gap. During the drying process of the test block, the concrete slurry in the gap will also solidify. The solidified concrete will not only stick to the support plate and the bottom plate, making it difficult to push the support plate during demoulding, thereby making it difficult to successfully demould, but also stick to the support plate and the bottom plate, making it difficult to clean, so that the support plate and the bottom plate cannot be completely fitted together. In severe cases, the entire demoulding device cannot be used normally. Summary of the invention

[0006] The invention provides a concrete anti-seepage test mold to solve the technical problem that the existing test mold device easily causes the test block to be damaged during the demoulding process.

[0007] In order to solve the above problems, the concrete anti-seepage test mold provided by the present invention adopts the following technical solutions:

[0008] The concrete anti-seepage test mold includes a bottom cover and a mold barrel, and also includes at least two scrapers and guide pieces corresponding to the scrapers one by one; the bottom cover includes a bottom plate and a plurality of handrail outer tubes erected on the bottom plate, the bottom plate is plugged and matched with the mold barrel, and a connecting piece corresponding to the guide piece is arranged in the circumferential direction of the mold barrel; the scraper includes an arc plate body and a sliding sleeve, the arc plate body of each scraper can enclose an outer circle not less than the mold barrel mouth, the sliding sleeve is coaxial with the handrail outer tube, and the sliding sleeve can rotate and slide up and down in the handrail outer tube, so that the arc plate body has a scraping position for scraping concrete overflowing from the mold barrel and a supporting position in which the surface is flush with the end face of the mold barrel during demoulding; the handrail The outer tube and the corresponding connecting piece are guided and slidably matched in the up and down directions. A pushing piece is provided between the outer tube of the handrail and the corresponding connecting piece. The pushing piece is coaxially sleeved on the outer tube of the handrail so that the pushing piece can rotate and slide up and down relative to the outer tube of the handrail. The pushing piece is provided with a telescopic portion that can be telescoped in the up and down directions so that the pushing piece can respectively stop and cooperate with the outer tube of the handrail and the corresponding connecting piece in the up and down directions; the guide piece is stopped and rotated with the sliding sleeve and is slidably assembled in the up and down directions. The guide piece is coaxial with the outer tube of the handrail and stops and cooperates with the outer tube of the handrail when the scraper is in the scraping position, and slides and cooperates with the outer tube of the handrail in the up and down directions when the scraper is in the supporting position.

[0009] The beneficial effect is that before pouring concrete slurry into the mold tube, the telescopic part rotates with the pusher around the outer tube of the handrail until it is crimped on the connecting piece. The connecting piece is subjected to downward pressure, pressing the mold tube against the bottom plate, reinforcing the connection between the mold tube and the bottom cover, and avoiding leakage during grouting; and the arc plate body of each scraper can form an outer circle not less than the mold tube mouth, and is placed on the mold tube, which is equivalent to temporarily expanding the mold tube. On the premise of ensuring that the concrete can fill the mold tube, it can avoid the spillage of concrete during grouting and vibration. After the grouting is completed and the concrete in the mold tube is vibrated on the vibration plate, as the sliding sleeve rotates and slides up and down in the outer tube of the handrail, the arc plate body on the scraper can scrape off the concrete overflowing from the mold tube, and after scraping, it can fall to a fixed position flush with the upper surface of the mold tube, which is convenient for demolding the test block after the concrete anti-seepage test mold is inverted. When the test mold is flipped for demoulding, the telescopic part rotates with the pusher around the handrail outer tube to a position away from the mold tube. At this time, under the guidance of the guide member, the handrail outer tube can be pulled upward to separate the bottom cover from the mold tube first, and the handrail outer tube is pulled upward. After the pusher and the connecting member stop and cooperate, the pusher and the mold tube move upward together to separate from the test block and complete the demoulding. In the process of the scraper rotating to scrape the concrete, the guide member rotates with the scraper and cooperates with the handrail outer tube to prevent the guide member from sliding in the handrail outer tube; after the scraper rotates, the guide member slides with the handrail outer tube. In the demoulding process, the guide member provides axial support for the bottom cover and the mold tube to prevent the mold tube from deflecting and colliding with the test block, causing damage to the test block.

[0010] Furthermore, an annular groove, a vertical groove connected to the annular groove, and a horizontal groove connected to the vertical groove are coaxially provided on the outer circumferential surface of the sleeve, the vertical groove extends in the up-down direction, and a locking hole is also provided on the sleeve at a position corresponding to the annular groove, the axis of the locking hole is perpendicular to the axis of the sleeve, and a locking piece is inserted into the outer tube of the handrail in a direction perpendicular to the axis of the sleeve; the locking piece can be plugged into the locking hole to fix the scraper, and the end of the locking piece can be extended into the annular groove to enable the scraper to rotate and scrape concrete. When the scraper rotates to a position corresponding to the vertical groove and the locking piece, the sleeve can slide up and down relative to the locking piece; when the scraper rotates to the point where the locking piece extends into the horizontal groove, the scraper is in a supporting position.

[0011] The beneficial effect is that the scraper state can be adjusted by only setting a corresponding structure on the scraper to cooperate with the locking member, without the need to set up additional actuators to drive the scraper to adjust the state, and the overall structure is simpler.

[0012] Furthermore, a compression spring is provided on the part of the guide member located in the sliding sleeve, a stopping protrusion is provided at the lower end of the guide member, and a sliding groove is provided inside the outer tube of the handrail for slidingly cooperating with the stopping protrusion in the up and down directions; the two ends of the compression spring respectively abut against the guide member and the sliding sleeve, and when the locking member is plugged into the lock hole, the compression spring is in a compressed state, and when the vertical groove corresponds to the locking member, the stopping protrusion and the sliding groove are stop-fitted in the up and down directions and the elastic force of the compression spring drives the scraper to move downward relative to the locking member; when the locking member extends into the horizontal groove, the stopping protrusion rotates to the sliding groove position.

[0013] The beneficial effect is that before the locking piece rotates to the end of the horizontal groove, the lower end of the guide piece cooperates with the slide groove to stop, the compression spring is in a compressed state, and a downward elastic force is generated on the sliding sleeve. Once the locking piece enters the vertical groove, the scraper quickly falls to be flush with the upper surface of the mold cylinder.

[0014] Furthermore, a stopping step is provided on the outer tube of the handrail, and a pushing member is installed on the stopping step; the telescopic part is a spring pin, and when the spring pin is rotated to above the corresponding connecting member, the pushing member cooperates with the outer tube of the handrail for stopping, and the connecting member is provided with a notch for guiding and cooperating with the spring pin in the up and down directions when the spring pin is rotated to the outside of the corresponding connecting member.

[0015] The beneficial effects are: the pushing member has a simple structure and is easy to install and adjust.

[0016] Furthermore, the notch is an arc-shaped groove extending from the upper end of the connecting piece to the lower end of the connecting piece.

[0017] The beneficial effect is that the pushing member and the spring pin can slide along the notch guide.

[0018] Furthermore, the inner cavity of the mold cylinder is a truncated cone-shaped cavity with a diameter gradually decreasing from top to bottom.

[0019] The beneficial effect is that a concrete anti-seepage test block that meets the specification requirements can be produced, and when the test mold is inverted for demoulding, the diameter of the truncated cone test block gradually decreases from bottom to top, which facilitates the separation of the test block and the test mold.

[0020] Furthermore, a grip portion is provided on the outer tube of the handrail, and the outer surface of the grip portion is wavy.

[0021] The beneficial effect is that it is convenient to hold the outer tube of the handrail during demoulding and to pull up the test mold.

[0022] Furthermore, two scrapers are provided and arranged in a central symmetric manner about the axis of the mold cylinder.

[0023] Furthermore, an annular protrusion is provided on the bottom plate, the mold cylinder has an upper flange and a lower flange, and the lower flange is provided with an annular slot that is plugged and matched with the annular protrusion.

[0024] The beneficial effect is that when the mold tube is placed vertically on the bottom plate of the bottom cover, the annular protrusion on the bottom plate matches and is embedded in the annular slot on the mold tube, preventing displacement between the mold tube and the bottom cover when concrete slurry is poured into the mold tube.

[0025] Furthermore, a plurality of evenly distributed reinforcing ribs are provided on the outer periphery, the upper ends of the reinforcing ribs are connected to the upper flange, and the lower ends of the reinforcing ribs are connected to the lower flange.

[0026] The beneficial effect is: improving the structural strength of the mold barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the concrete anti-seepage test mold;

[0029] Figure 2 It is a cross-sectional schematic diagram of a concrete impermeability test mold;

[0030] Figure 3 It is a structural schematic diagram of the mold barrel;

[0031] Figure 4 is a bottom view of the mold cylinder;

[0032] Figure 5 A schematic diagram showing a notch on a connector;

[0033] Figure 6 is a top view of the bottom cover;

[0034] Figure 7 It is a structural schematic diagram of a spring pin;

[0035] Figure 8 is a structural schematic diagram of a guide member;

[0036] Fig. 9 It is a schematic diagram of the scraper from the first perspective;

[0037] Fig.10 A schematic diagram of the scraper from a second viewing angle;

[0038] Fig.11 It is a schematic diagram of the scraper rotating to the supporting position;

[0039] Fig.12 A schematic diagram of the bottom cover being separated from the mold barrel;

[0040] Fig.13It is a schematic diagram showing that the mold barrel is separated from the test block along with the bottom cover.

[0041] Description of reference numerals:

[0042] 1. Bottom cover; 2. Mold cylinder; 3. Guide member; 4. Scraper; 5. Push member; 6. Locking member; 7. Upper flange; 8. Lower flange; 9. Annular slot; 10. Annular protrusion; 11. Cone-shaped cavity; 12. Connector; 13. Reinforcement rib; 14. Notch; 15. Bottom plate; 16. Handrail outer tube; 17. Stop step; 18. Swivel; 19. Spring pin; 20. Handhold; 21. Slide; 22. Mounting hole; 23. Axle; 24. Upper plug joint; 25. Lower plug joint; 26. Spring; 27. Stop protrusion; 28. Arc plate; 29. ​​Sliding sleeve; 30. Connecting handle; 31. Locking hole; 32. Annular groove; 33. Vertical groove; 34. Horizontal groove; 35. First plug hole. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0044] Various non-limiting embodiments of the present invention are described in detail below. The number of any element in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0045] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0046] An embodiment of a concrete anti-permeability test mold provided by the present invention:

[0047] like Figure 1 and Figure 2 As shown, the concrete anti-seepage test mold includes a bottom cover 1, a mold tube 2, a guide member 3, a scraper 4 and a pusher 5.

[0048] like Figure 3 As shown, the mold cylinder 2 has an upper flange 7 and a lower flange 8. Figure 4As shown, an annular slot 9 is provided on the lower flange 8; the inner cavity of the mold barrel 2 is a truncated cone-shaped cavity 11 with a diameter that gradually decreases from top to bottom. After the test mold is inverted, the diameter of the truncated cone-shaped cavity 11 gradually increases from top to bottom, which facilitates the separation of the test block from the mold barrel 2. Of course, in other embodiments, the inner cavity of the mold barrel 2 can also be a cylindrical cavity with the same diameter from top to bottom. A plurality of evenly distributed reinforcing ribs 13 are provided on the outer periphery of the mold barrel 2. The reinforcing ribs 13 extend in the up-and-down directions. The upper ends of the reinforcing ribs 13 are connected to the upper flange 7, and the lower ends are connected to the lower flange 8. Two of the symmetrically arranged reinforcing ribs 13 in the diameter direction of the mold barrel 2 are respectively connected with connecting pieces 12. The connecting piece 12 is in the shape of a plate and is provided with a first plug hole 35, as shown in FIG. Figure 5 As shown, a notch 14 is provided at the edge of one end of the connecting member 12 away from the reinforcing rib 13 . The notch 14 is an arc-shaped slot extending from the upper end surface of the connecting member 12 to the lower end surface of the connecting member 12 .

[0049] The bottom cover 1 includes a bottom plate 15 and handrail outer tubes 16 located on both sides of the mold tube 2 and connected to the bottom plate 15. Figure 6 As shown, a circle of annular protrusions 10 are provided on the bottom plate 15, and the mold tube 2 is placed vertically on the bottom plate 15, so that the annular protrusions 10 on the bottom plate 15 match the annular slots 9 embedded in the mold tube 2, so as to realize the plug-in fit between the bottom cover 1 and the mold tube 2, and prevent displacement between the mold tube 2 and the bottom cover 1 when concrete slurry is poured into the mold tube 2.

[0050] The two handrail outer tubes 16 pass through the first insertion holes 35 on the two connecting members 12 respectively, and are guided and slidably matched with the connecting members 12 in the up-down direction. A pusher 5 is coaxially sleeved on the portion of the handrail outer tube 16 above the connecting member 12, and the pusher 5 can rotate and slide up-down relative to the handrail outer tube 16. In this embodiment, the pusher 5 includes a swivel 18 coaxially arranged with the handrail outer tube 16 and a spring pin 19 connected to one end of the swivel 18, as shown in FIG. Figure 7As shown, the spring pin 19 can be extended and retracted in the up and down directions, thereby forming a retractable portion on the pusher 5, and the spring pin 19 can rotate around the handrail outer tube 16 together with the swivel 18. A stop step 17 is provided on the handrail outer tube 16 at a position corresponding to the swivel 18. When the spring pin 19 rotates to a position above the connecting member 12, the spring pin 19 is in a compressed state and applies elastic force to the swivel 18 to press the swivel 18 against the stop step 17. When the spring pin 19 rotates to the notch 14 of the connecting member 12, the swivel 18 can move toward the connecting member 12. During the movement, the notch 14 guides the spring pin 19. When the swivel 18 moves to fit with the connecting member 12, it stops and cooperates with the connecting member 12. A second plug hole is provided in the part of the handrail outer tube 16 located above the stop step 17. The axis of the second plug hole is perpendicular to the axis of the handrail outer tube 16. A movable locking member 6 is inserted into the second plug hole. The locking member 6 is a limit bolt. A grip portion 20 is provided at the portion of the handrail outer tube 16 below the connector 12. The outer surface of the grip portion 20 is wavy, which is convenient for holding and pulling up the test mold during demoulding.

[0051] like Figure 8 As shown, the guide member 3 is coaxially arranged in the corresponding handrail outer tube 16, including a shaft body 23 and an upper plug connector 24 and a lower plug connector 25 respectively located at the upper and lower ends of the shaft body 23, the upper plug connector 24 is a hexagonal plug connector, and the lower plug connector 25 is a circular plug connector. Among them, the shaft body 23 is relatively thin, and a spring 26 is provided at the connection between the upper plug connector 24 and the shaft body 23. A stop protrusion 27 is integrally formed on the lower plug connector 25, and the stop protrusion 27 extends in the up and down direction. The upper end surface of the guide member 3 is flush with the upper flange 7 surface of the mold tube 2 after the mold tube 2 and the bottom cover 1 overlap.

[0052] There are two scrapers 4, which are arranged symmetrically around the axis of the mold cylinder 2. Fig. 9 and Fig.10 As shown, each scraper 4 includes a circular plate body 28, a connecting handle 30 and a sliding sleeve 29 connected together. The circular plate body 28 here is a semi-circular plate body 28. The circular plate bodies 28 of the two scrapers 4 surround the tube mouth of the mold tube 2 and abut against each other, and are placed on the upper flange 7 of the mold tube 2. Since the concrete needs to be higher than the test mold when adding concrete, a space is formed between the two circular plate bodies 28 for excess concrete to overflow the mold tube 2. Of course, in other embodiments, more than three scrapers 4 can also be provided, as long as they can surround an outer circle that is not smaller than the tube mouth of the mold tube 2 and can scrape off the concrete overflowing the mold tube 2.

[0053] The portion of the handrail outer tube 16 located above the stop step 17 has a mounting hole 22, and the sliding sleeve 29 can slide and rotate in the mounting hole 22. The shaft 23 of the guide member 3 passes through the mounting hole 22 and penetrates into the sliding sleeve 29. The inner hole of the sliding sleeve 29 is a hexagonal hole matching the upper plug joint 24, so that the guide member 3 can rotate with the sliding sleeve 29, and the sliding sleeve 29 can slide up and down relative to the shaft 23. A sliding groove 21 extending in the up-down direction is provided in the handrail outer tube 16. When the stop protrusion 27 located on the lower plug joint 25 rotates to the position of the sliding groove 21 with the sliding sleeve 29, the stop protrusion 27 and the sliding groove 21 can achieve guided sliding cooperation; when the stop protrusion 27 located on the lower plug joint 25 is in other positions, it stops and cooperates with the handrail outer tube 16 in the up-down direction. The lower end of the spring 26 abuts against the bottom of the mounting hole 22 , and the spring 26 is always in a compressed state when the sleeve 29 rotates to allow the scraper 4 to scrape away the concrete overflowing from the mold tube 2 .

[0054] The outer circumferential surface of the sleeve 29 is coaxially provided with an annular groove 32, a vertical groove 33 connected to the annular groove 32, and a horizontal groove 34 connected to the vertical groove 33. The vertical groove 33 extends in the up-down direction. The sleeve 29 is also provided with a locking hole 31 at a position corresponding to the annular groove 32. The axis of the locking hole 31 is perpendicular to the axis of the sleeve 29. During the rotation stroke of the sleeve 29, the locking member 6 is inserted and pulled, so that the locking member 6 can be inserted into the locking hole 31, the annular groove 32, the vertical groove 33 and the horizontal groove 34 respectively. When the locking member 6 is inserted into the locking hole 31, the sleeve 29 is in a fixed state, that is, at this time, the scraper 4 is fixed and can neither rotate nor move up and down, and the arc plate bodies 28 of the two scrapers 4 are butted. When the locking member 6 is inserted into the annular groove 32, the sleeve 29 can rotate relative to the handrail outer tube 16. At this time, the two scrapers 4 are used to scrape the concrete overflowing from the mold cylinder 2, and the scrapers 4 are in the scraping position. When the sleeve 29 rotates to the position corresponding to the locking piece 6 and the vertical groove 33, since the stopping protrusion 27 and the handrail outer tube 16 are stopped in the up and down directions, the spring 26 is stretched at this time, and a downward elastic force is applied to the sleeve 29 to make the scraper 4 move downward relative to the locking piece 6, and under the action of the scraper 4's own gravity, it moves to the position corresponding to the locking piece 6 and the horizontal groove 34. At this time, the upper surface of the arc plate body 28 is flush with the surface of the upper flange 7; continue to rotate the sleeve 29, the locking piece 6 is located at the horizontal groove 34, supporting the scraper 4, and the scraper 4 is in the supporting position at this time, and at this time the stopping protrusion 27 rotates into the slide groove 21, and the stopping protrusion 27 cooperates with the slide groove 21, so that the guide member 3 can slide up and down inside the handrail outer tube 16.

[0055] Before casting the test block, the bottom cover 1 is placed horizontally, and the mold tube 2 is placed vertically on the bottom plate 15 of the bottom cover 1. The annular protrusion 10 on the bottom plate 15 is matched and embedded in the annular slot 9 on the mold tube 2. The two scrapers 4 cooperate with each other and overlap above the mold tube 2 after a circle. The locking member 6 is inserted into the locking hole 31 to fix the scraper 4 and the handrail outer tube 16. The two scrapers 4 form a space above the mold tube 2 for excess concrete to overflow the mold tube 2. The spring pin 19 rotates to a position on the connecting member 12 close to the mold tube 2 to press the mold tube 2 downward. After that, concrete can be poured into the space formed by the mold tube 2, the bottom cover 1 and the scraper 4, and the concrete impermeability test mold can be placed on the vibration plate. The concrete in the test mold is tightly combined by vibration, and then the locking member 6 is partially loosened to allow the locking member 6 to enter the annular groove 32. The two scrapers 4 are rotated respectively to scrape off the excess concrete on the top of the mold tube 2. When the scraper 4 is rotated to the position where the locking member 6 is located below the vertical groove 33, the spring 26 stretches and exerts a downward elastic force on the sliding sleeve 29, and the scraper 4 slides down along the guide member 3 to the position where the upper surface of the scraper 4 is flush with the upper end surface of the guide member 3 and the upper flange 7. Continue to rotate the scraper 4 until the locking member 6 reaches the end of the horizontal groove 34 and can no longer rotate. Fig.11 As shown, the scraper 4 reaches the supporting position; since the guide member 3 and the scraper 4 are anti-rotationally matched, when the scraper 4 rotates, the guide member 3 also rotates in the handrail outer tube 16. When the scraper 4 reaches the supporting position, the stop protrusion 27 at the lower end of the guide member 3 enters the slide groove 21 in the handrail outer tube 16, so that the guide member 3 can slide up and down in the handrail outer tube 16.

[0056] After the test block solidifies, turn the test mold over and buckle it in a suitable position, completely loosen the locking member 6, and rotate the swivel 18 to rotate the spring pin 19 to the notch 14 of the connecting member 12 on the mold barrel 2. Pull the handhold 20 on the handrail outer tube 16 upward, and the stop step 17 on the handrail outer tube 16 pushes the pusher 5 upward, and at the same time, the spring pin 19 moves upward along the notch 14 until the swivel 18 fits the connecting member 12. Fig.12 As shown, during this process, the bottom plate 15 is separated from the test block while the mold tube 2 is not separated from the test block. As air enters between the test block and the bottom plate 15, it is easier to pull the mold tube 2 and the test block apart. In addition, since the stop protrusion 27 at the lower end of the guide member 3 cooperates with the slide groove 21 in the handrail outer tube 16, the handrail outer tube 16 can slide upward along the guide member 3. The guide member 3 provides axial support during the demolding process to prevent the mold tube 2 from colliding with the test block and causing damage to the test block. Continue to pull the hand-held portion 20 upward. At this time, the swivel 18 is in contact with the connector 12, and the push member 5 is in contact with the connector 12 on the mold tube 2, as shown in FIG. Fig.13 As shown, the mold tube 2 is pushed upward by the pusher 5 and moves upward together with the handrail outer tube 16, gradually separating from the test block, completing the demoulding of the concrete anti-seepage test block.

[0057] The present invention can prevent concrete from spilling during grouting and vibration while ensuring that the concrete fills the mold tube 2; and can more easily scrape off excess concrete on the surface of the test block; and can also use the guide member 3 to provide axial support for the bottom cover 1 and the mold tube 2 during the demoulding process, thereby preventing the mold tube 2 from tilting and colliding with the test block, thereby preventing the test block from being damaged.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A concrete anti-seepage test mold, comprising a bottom cover and a mold cylinder, characterized in that: It also includes at least two scrapers and guide pieces corresponding to the scrapers one by one; the bottom cover includes a bottom plate and a plurality of handrail outer tubes vertically arranged on the bottom plate, the bottom plate is plug-fitted with the mold barrel, and a connecting piece corresponding to the guide piece is arranged in the circumferential direction of the mold barrel; The scraper includes an arc plate body and a sliding sleeve. The arc plate body of each scraper can enclose an outer circle that is not smaller than the outer circle of the mold barrel. The sliding sleeve is coaxial with the outer tube of the handrail. The sliding sleeve can rotate and slide up and down in the outer tube of the handrail, so that the arc plate body has a scraping position for scraping concrete overflowing from the mold barrel and a supporting position where the surface is flush with the end surface of the mold barrel during demoulding. The outer tube of the handrail and the corresponding connecting piece are guided and slidably matched in the up-down direction, a pushing piece is provided between the outer tube of the handrail and the corresponding connecting piece, the pushing piece is coaxially sleeved on the outer tube of the handrail so that the pushing piece can rotate and slide up-down relative to the outer tube of the handrail, and the pushing piece has a telescopic part that can be telescoped in the up-down direction so that the pushing piece can stop and match with the outer tube of the handrail and the corresponding connecting piece respectively in the up-down direction; The guide piece is anti-rotationally matched with the sliding sleeve and is slidably assembled in the up-down direction. The guide piece is coaxial with the outer tube of the handrail and is anti-rotationally matched with the outer tube of the handrail when the scraper is in the scraping position, and is slidably matched with the outer tube of the handrail in the up-down direction when the scraper is in the supporting position; An annular groove, a vertical groove connected to the annular groove, and a horizontal groove connected to the vertical groove are coaxially provided on the outer circumferential surface of the sliding sleeve, the vertical groove extends in the up-down direction, a locking hole is also provided on the sliding sleeve at a position corresponding to the annular groove, the axis of the locking hole is perpendicular to the axis of the sliding sleeve, and a locking piece is inserted into the outer tube of the handrail in a direction perpendicular to the axis of the sliding sleeve; the locking piece can be plugged into the locking hole to fix the scraper, the end of the locking piece can be extended into the annular groove to enable the scraper to rotate and scrape concrete, when the scraper rotates to a position corresponding to the vertical groove and the locking piece, the sliding sleeve can slide up and down relative to the locking piece; when the scraper rotates to the locking piece extending into the horizontal groove, the scraper is in a supporting position; A stopping step is provided on the outer tube of the handrail, and the pushing member is installed on the stopping step; the telescopic part is a spring pin, and when the spring pin rotates to the top of the corresponding connecting member, the pushing member and the outer tube of the handrail are stopped and matched, and the connecting member is provided with a notch for guiding and matching with the spring pin in the up and down directions when the spring pin rotates to the outside of the corresponding connecting member.

2. A concrete anti-seepage test mold according to claim 1, characterized in that: The part of the guide member located in the sliding sleeve is sleeved with a compression spring, the lower end of the guide member is provided with a stopping protrusion, and the inner part of the outer tube of the handrail is provided with a sliding groove for slidingly cooperating with the stopping protrusion in the up and down directions; the two ends of the compression spring respectively abut against the guide member and the sliding sleeve, and when the locking member is plugged into the lock hole, the compression spring is in a compressed state, and when the vertical groove corresponds to the locking member, the stopping protrusion and the sliding groove are stop-fitted in the up and down directions and the elastic force of the compression spring drives the scraper to move downward relative to the locking member; when the locking member extends into the horizontal groove, the stopping protrusion rotates to the sliding groove position.

3. A concrete anti-seepage test mold according to claim 2, characterized in that: The notch is an arc-shaped groove extending from the upper end of the connecting piece to the lower end of the connecting piece.

4. A concrete anti-seepage test mold according to claim 1 or 2, characterized in that: The inner cavity of the mold barrel is a truncated cone-shaped cavity with a diameter gradually decreasing from top to bottom.

5. A concrete anti-seepage test mold according to claim 1 or 2, characterized in that: A grip portion is provided on the outer tube of the handrail below the connecting piece, and the outer surface of the grip portion is wavy.

6. A concrete anti-seepage test mold according to claim 1 or 2, characterized in that: Two scrapers are provided and arranged in a central symmetric manner about the axis of the mold cylinder.

7. A concrete anti-seepage test mold according to claim 1 or 2, characterized in that: The bottom plate is provided with an annular protrusion, the mold cylinder is provided with an upper flange and a lower flange, and the lower flange is provided with an annular slot which is plugged and matched with the annular protrusion.

8. A concrete anti-seepage test mold according to claim 7, characterized in that: A plurality of evenly distributed reinforcing ribs are arranged on the outer periphery, the upper ends of the reinforcing ribs are connected to the upper flange, and the lower ends of the reinforcing ribs are connected to the lower flange.

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