Constant-stress cement strength press

Abstract

The utility model relates to the field of press machines, in particular to a constant-stress cement strength press machine which comprises a rack, a controller is arranged on one side of the front end of the rack, a display screen is detachably installed on one side of the upper end of the rack, a fixing frame is welded to the upper end of one side of the rack, and a supporting seat is integrally formed at the lower end of the rack. A containing cavity is formed in the middle of one side of the rack, a supporting strip is welded to the lower end of the interior of the containing cavity, a protection assembly is arranged at the upper end of the containing cavity, and a limiting assembly is arranged in the middle of the containing cavity. The device is simple in structure and convenient to operate, splashed chippings can slide to the bottom of the containing cavity conveniently, the problem that the chippings are blocked through parts such as a protective cover, but the chippings are not cleaned thoroughly is solved, semicircular strips on a positioning plate can abut against the two sides of a cement test block through cooperation of a jacking frame and the positioning plate, and therefore the cement test block can be positioned.

Description

Technical Field

[0001] This utility model relates to the field of pressure machines, and in particular to a constant stress cement strength pressure machine. Background Technology

[0002] Cement strength refers to the ability of a hardened cement mortar specimen to withstand external force damage. Cement strength is an important indicator for evaluating cement quality and is the basis for classifying cement strength grades. Depending on the form of stress, cement strength is usually divided into compressive strength, flexural strength, and tensile strength. The maximum stress that a hardened cement mortar specimen withstands when subjected to compressive failure is called the compressive strength of cement. Cement specimens are tested using a pressure machine.

[0003] In use, existing cement strength presses, while capable of performing crushing tests on cement blocks by placing the test block between two pressure plates and using positioning devices to prevent displacement during pressure testing, suffer from several drawbacks. Firstly, the cement block easily breaks under pressure, causing fragments to become trapped within the positioning devices. This hinders the repositioning of the devices and further impacts the positioning and testing of other cement blocks. Secondly, while existing presses typically incorporate protective covers to prevent fragments from splashing during crushing, the presence of these covers significantly hinders effective cleaning of the fragments, leading to incomplete cleaning and further affecting the pressure testing of other cement blocks. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems in the above or existing technologies, such as poor positioning effect affecting the resetting of positioning components, and unsatisfactory protection effect making it inconvenient to clean up the splashed debris of cement test blocks, this utility model is proposed.

[0006] Therefore, the purpose of this invention is to provide a constant stress cement strength press.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a constant stress cement strength press, including a frame, a controller is provided on one side of the front end of the frame, a display screen is detachably installed on one side of the upper end of the frame, a fixed frame is welded to the upper end of one side of the frame, a support base is integrally formed on the lower end of the frame, a receiving cavity is formed in the middle of one side of the frame, a support bar is welded to the lower end of the inside of the receiving cavity, a protective component is provided at the upper end of the receiving cavity, a limit component is provided in the middle of the receiving cavity, and a lifting component is provided at the lower end of the receiving cavity. The protective component includes components welded to the inner side of the lower end of the fixed frame. The device comprises a straight plate with an inclined plate mounted on its upper end and a positioning plate below it. The upper end of the positioning plate is rotatably connected to the lower end of the straight plate via a hinge seat. The limiting assembly includes the rotatably mounted positioning plate. A positioning strip is welded to the middle of the inner side of the positioning plate. A semi-circular strip is fixedly mounted on the other side of the positioning strip. There are two semi-circular strips and positioning strips, and the semi-circular strips are symmetrically arranged. A spring is fixedly mounted on the inner side of the upper end of the positioning plate. The other end of the spring is fixedly connected to the inner wall of the upper end of the receiving cavity. A fixing strip is provided at the lower end of the positioning plate, and the fixing strip is fixedly connected to the positioning plate by fastening screws.

[0008] As a preferred embodiment of the constant stress cement strength press of this utility model, the lower end of the inclined plate forms a 30-degree angle with the upper end of the straight plate, and the length of the straight plate is the same as the length of the inclined plate, and the size of the positioning plate is smaller than the inner cavity size of the receiving cavity.

[0009] In a preferred embodiment of the constant stress cement strength press of this utility model, the lifting assembly includes a lifting frame, the two sides of which are respectively movably connected to the two sides of the support bar, a screw sleeve is fixedly installed in the middle of the lifting frame, a fixing rod is welded to the upper end of the lifting frame, and a ball is fixedly installed on the side of the fixing rod near the positioning plate, the smooth surface of the ball is in contact with the inner side of the positioning plate.

[0010] In a preferred embodiment of the constant stress cement strength press of this utility model, a servo motor is fixedly installed at the lower end of the support base, and a lead screw is installed at the output end of the servo motor. The size of the lead screw is adapted to the size of the lead screw sleeve, and the lead screw and the lead screw sleeve are threadedly connected.

[0011] As a preferred embodiment of the constant stress cement strength press of this utility model, a first hydraulic cylinder is fixedly installed at the upper middle part of the fixed frame, and an upper pressure plate is installed at the output end of the first hydraulic cylinder. A second hydraulic cylinder is fixedly installed at the upper middle part of the support bar, and a lower pressure plate is installed at the output end of the second hydraulic cylinder. The upper pressure plate and the lower pressure plate are on the same vertical plane. A discharge channel is provided on one side of the lower end of the receiving cavity, and the discharge channel is connected to the receiving cavity.

[0012] As a preferred embodiment of the constant stress cement strength press of this utility model, the upper end of the fixed frame is provided with an insertion channel, and the lower edge of the insertion channel is flush with the upper edge of the inclined plate, and the length of the insertion channel is the same as the length of the inclined plate.

[0013] As a preferred embodiment of the constant stress cement strength press of this utility model, the inner walls on both sides of the receiving cavity are provided with sliding grooves, and a slider is welded to the side of the fixed rod near the sliding groove. The size of the slider is adapted to the size of the sliding groove, and the slider is slidably connected to the sliding groove.

[0014] The beneficial effects of this utility model of constant stress cement strength press:

[0015] This invention effectively blocks splashed debris during cement block testing through the inclusion cavity. Furthermore, the combination of the inclined plate extending from the upper part of the straight plate and the positioning plate extending from the lower part of the straight plate creates a long, sloping shielding surface, further preventing debris splashing. It also facilitates the sliding of splashed debris to the bottom of the inclusion cavity, solving the problem of incomplete debris removal when using protective covers or other components for debris blocking. The lifting frame, in conjunction with the positioning plate, allows the semi-circular strips on the positioning plate to press against both sides of the cement block, enabling proper positioning and facilitating the pressing process. The coordinated design of these components prevents debris from getting stuck in the positioning parts. When the positioning plate returns to a vertical position, any remaining debris can be easily discharged, making it convenient for workers to clean up debris generated during cement block testing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall frame of the constant stress cement strength press.

[0018] Figure 2 This is a schematic diagram of the lifting frame and lead screw structure of a constant stress cement strength press.

[0019] Figure 3 This is a side view of the frame structure of a constant stress cement strength press.

[0020] Figure 4This is a schematic diagram of the frame structure of the constant stress cement strength press at the first angle.

[0021] Figure 5 This is a schematic diagram of the second-angle cross-sectional structure of the frame of the constant stress cement strength press.

[0022] 1. Frame; 11. Controller; 12. Display screen; 13. Support base; 14. Fixing frame; 15. Feeding channel; 16. Support bar; 2. Receiving cavity; 21. Straight plate; 22. Inclined plate; 23. Positioning plate; 24. Positioning bar; 25. Semicircular bar; 26. Spring; 27. Hinge seat; 28. Fixing bar; 3. Lifting frame; 31. Lead screw sleeve; 32. Fixing rod; 33. Ball; 34. Slider; 35. Slide groove; 36. Servo motor; 37. Lead screw; 4. First hydraulic cylinder; 5. Upper pressure plate; 6. Second hydraulic cylinder; 7. Lower pressure plate; 8. Discharge channel. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0026] Example 1, referring to Figures 1 to 5This is the first embodiment of the present invention, which provides a constant stress cement strength press. It solves the problems of poor positioning affecting the resetting of positioning components and inconvenient cleaning of cement sample fragments due to unsatisfactory protection. The press includes a frame 1, with a controller 11 mounted on one side of the front end. The controller 11 is installed on the right side of the front end of the frame 1 via bolts and washers, facilitating the control of various electrical components. The signal terminal of the controller 11 is connected to the signal terminal of a display screen 12 on the upper right side of the frame 1. A display screen 12 is detachably mounted on one side of the upper end of the frame 1 for convenient display of control methods and pressure detection of cement samples. A fixing frame 14 is welded to the upper side of one side of the frame 1, and is fixedly installed on the upper left side of the frame 1 by welding, enabling the installation and positioning of the straight plate 21 and the inclined plate 22. A support base 13 is integrally formed at the lower end of the frame 1, effectively supporting the frame 1 and maintaining a certain height from the ground. A receiving cavity 2 is opened in the middle of one side of the frame 1 for convenient... The various components are accommodated by the receiving cavity 2. The receiving cavity 2 effectively blocks splashed debris during cement block testing. A support strip 16 is welded to the lower end of the receiving cavity 2, providing effective support for the cement block compression testing equipment. A protective component is installed at the upper end of the receiving cavity 2 to protect against splashed debris during the cement block compression test, ensuring the safety of the testing personnel and preventing debris from scattering. A limiting component is installed in the middle of the receiving cavity 2 to limit the cement block being tested, and the components of the limiting component can easily and effectively discharge debris from the cement block, further reducing the workload of the personnel. A lifting component is installed at the lower end of the receiving cavity 2 to effectively lift and support the components in the limiting component, thus achieving an integrated positioning and discharge system, simplifying the operation steps for the personnel.

[0027] Specifically, the protective components include straight plates 21 welded to the inner side of the lower end of the fixing frame 14. The two straight plates 21 below the fixing frame 14 effectively connect and support components such as the positioning plate 23 below the fixing frame 14, ensuring the stability of these components. An inclined plate 22 is installed at the upper end of the straight plate 21, with its lower end forming a 30-degree angle with the upper end of the straight plate 21. This inclined arrangement of the inclined plate 22 extends the shielding area above the straight plate 21, further blocking the splashing debris from the cement test block. Furthermore, the inclined arrangement of the inclined plate 22 allows debris to slide off its inclined surface, further ensuring the blocking effect on the cement test block debris. A positioning plate 23 is installed below the straight plate 21 to facilitate passage... The positioning plate 23 can effectively position the cement test block to be tested. Moreover, the long inclined surface of the positioning plate 23 can extend the shielding area below the straight plate 21, so that the inclined plate 22 and the positioning plate 23 form a long shielding surface, which further prevents debris from splashing. Secondly, the upper end of the positioning plate 23 is rotatably connected to the lower end of the straight plate 21 through the hinge seat 27, which further facilitates the rotation of the positioning plate 23 below the straight plate 21, so that the straight plate 21 can flexibly position the cement test block. Moreover, the flipped positioning plate 23 can also discharge debris. Finally, the size of the positioning plate 23 is smaller than the inner cavity size of the receiving cavity 2, which can ensure that the positioning plate 23 can rotate freely in the receiving cavity 2, so as not to affect the operation of other components.

[0028] Furthermore, the limiting component includes a rotatable positioning plate 23. A positioning strip 24 is welded to the inner center of the positioning plate 23. Due to the welding of the positioning strip 24, a stable connection between the positioning strip 24 and the positioning plate 23 is ensured. Therefore, during the upward rotation of the positioning plate 23, the positioning strip 24 on the positioning plate 23 can effectively press and position the cement test block, thereby facilitating the testing of the cement test block. A semi-circular strip 25 (rubber strip) is fixedly installed on the other side of the positioning strip 24. There are two semi-circular strips 25 and positioning strips 24, and the semi-circular strips 25 are symmetrically arranged. The symmetrical arrangement of the semi-circular strips 25 ensures uniform force on both sides of the cement test block. Moreover, the arc-shaped semi-circular strips 25 can reduce the accumulation of debris. This design ensures the positioning effect of the cement test block while preventing cement test block debris from getting stuck in the positioning components. A spring 26 is fixedly installed on the inner side of the upper end of the positioning plate 23, and the other end of the spring 26 is fixedly connected to the inner wall of the upper end of the receiving cavity 2. Due to the setting of the spring 26, it is convenient to apply a reaction force during the rotation of the positioning plate 23, so that the spring 26 drives the positioning plate 23 to rotate and reset after the cement test is completed. A fixing strip 28 is set at the lower end of the positioning plate 23, and the fixing strip 28 is fixedly connected to the positioning plate 23 by fastening screws. Finally, the setting of the fixing strip 28 can play a blocking effect at the lower end of the positioning plate 23, thereby limiting the position of the ball 33 and preventing the lifting frame 3 from moving excessively.

[0029] Preferably, the upper side of the fixing frame 14 has an insertion channel 15, which makes it convenient for staff to use pliers to put the cement test block into the receiving cavity 2 through the insertion channel 15, further facilitating the staff to carry out the cement test block test operation. Secondly, the lower edge of the insertion channel 15 is flush with the upper edge of the inclined plate 22, and the length of the insertion channel 15 is the same as the length of the inclined plate 22, ensuring that the inclined plate 22 will not play a role in getting in the way, thus making it convenient for staff to put the cement test block in.

[0030] It should be noted that the lifting assembly includes a lifting frame 3, with both sides of the lifting frame 3 movably penetrating through the sides of the support bar 16. Because the lifting frame 3 and the support bar 16 are connected through a continuous, movable connection, the stability of the lifting frame 3's vertical movement is ensured, further guaranteeing the pushing and flipping operation of the positioning plate 23. A lead screw sleeve 31 is fixedly installed in the middle of the lifting frame 3, and a servo motor 36 is fixedly installed at the lower end of the support base 13. A lead screw 37 is installed at the output end of the servo motor 36, and the size of the lead screw 37 is compatible with the size of the lead screw sleeve 31. Furthermore, the lead screw 37 is threadedly connected to the lead screw sleeve 31, which facilitates the movement of the lifting frame 3 up and down during the forward and reverse rotation of the servo motor 36 through the cooperation of the lead screw 37 and the lead screw sleeve 31. A fixing rod 32 is welded to the upper end of the lifting frame 3, and a ball 33 is fixedly installed on the side of the fixing rod 32 near the positioning plate 23. The smooth surface of the ball 33 is in contact with the inner side of the positioning plate 23, which facilitates the pushing of the inner side of the positioning plate 23 through the cooperation of the fixing rod 32 and the ball 33, thereby driving the positioning plate 23 to flip upward.

[0031] Furthermore, a first hydraulic cylinder 4 is fixedly installed at the upper middle part of the fixed frame 14, and an upper pressure plate 5 is installed at the output end of the first hydraulic cylinder 4. A second hydraulic cylinder 6 is fixedly installed at the upper middle part of the support bar 16, and a lower pressure plate 7 is installed at the output end of the second hydraulic cylinder 6. This facilitates simultaneous driving of the first hydraulic cylinder 4 and the second hydraulic cylinder 6, so that the upper pressure plate 5 cooperates with the lower pressure plate 7 to perform a crushing test on the defined cement test block. Pressure sensors set on the upper pressure plate 5 and the lower pressure plate 7 monitor the extrusion pressure, and the extrusion pressure is transmitted to the display screen 12 in real time through the controller 11, so as to facilitate the staff to record the test data of the cement test block. The upper pressure plate 5 and the lower pressure plate 7 are on the same vertical plane, which ensures that the position of extrusion on the cement test block is consistent, thereby ensuring the accuracy of the cement test block test data. A discharge channel 8 is provided on one side of the lower end of the receiving cavity 2. The discharge channel 8 is connected to the receiving cavity 2, which facilitates the centralized discharge of cement test block debris blocked by the receiving cavity 2, the inclined plate 22 and the positioning plate 23.

[0032] It should be noted that the inner walls on both sides of the receiving cavity 2 are provided with sliding grooves 35. A slider 34 is welded to the side of the fixing rod 32 near the sliding groove 35. The size of the slider 34 is adapted to the size of the sliding groove 35, and the slider 34 is slidably connected to the sliding groove 35. Due to the setting of the slider 34 and the sliding groove 35, it is easy to ensure the stability of the fixing rod 32 during the movement process, and also to ensure the stability of the lifting frame 3 moving up and down, thereby ensuring the stability of the rotation of the positioning plate 23.

[0033] In summary, during the experiment, the staff first used clamps to place the cement sample block into the receiving cavity 2 through the placement channel 15. Simultaneously, the servo motor 36 was turned on, causing the lead screw 37 to rotate forward. The lead screw 37, in conjunction with the lead screw sleeve 31, moved the lifting frame 3 upward. The lifting frame 3 then moved the fixed rod 32 and the ball 33 accordingly. The ball 33 contacted the inclined surface of the positioning plate 23. Due to the continuous upward movement of the ball 33, the ball 33 caused the positioning plate 23 to rotate upward, simultaneously stretching the spring 26. This caused the positioning plate 23 to rotate along with the inner welded positioning strip 24 and semi-circular strip 25, until the two semi-circular strips 25 inside the receiving cavity 2 pressed against both sides of the cement sample block. Then, the servo motor 36 was turned off, and the corresponding first hydraulic cylinder 4 and second hydraulic cylinder 6 were turned on, causing them to drive simultaneously. The upper pressure plate 5 and the lower pressure plate 7 work together to perform a crushing test on the defined cement test block. Pressure sensors on the upper pressure plate 5 and the lower pressure plate 7 monitor the compressive force, and the compressive force is transmitted to the display screen 12 in real time through the controller 11, so that the staff can record the test data of the cement test block. After the test is completed, the servo motor 36 is reversed, and the lead screw 37 and the lead screw sleeve 31 drive the lifting frame 3 to reset. At the same time as the lifting frame 3 resets, according to the elasticity of the spring 26, the deformed spring 26 drives the positioning plate 23 to rotate and reset until the ball 33 contacts the fixing bar 28, and the servo motor 36 stops, so that the positioning plate 23, which has been reset to a vertical state, can discharge the remaining debris, thus facilitating the cleaning of debris generated by the cement test block.

[0034] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0035] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0036] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A constant-stress cement strength press, characterized by: The utility model provides a kind of display screen protection device, including rack (1), the front end side of the rack (1) is provided with controller (11), the upper end side of the rack (1) is detachably installed with display screen (12), the upper end of the one side of the rack (1) is welded with fixed frame (14), the lower end of the rack (1) is integrally formed with support base (13), the middle part of the one side of the rack (1) is equipped with accommodating cavity (2), the inside lower end of the accommodating cavity (2) is welded with support strip (16), the upper end of the accommodating cavity (2) is provided with protection assembly, the middle part of the accommodating cavity (2) is provided with limiting assembly, the lower end of the accommodating cavity (2) is provided with jacking assembly; The protection assembly includes a straight plate (21) welded inside the lower end of the fixed frame (14), an inclined plate (22) is installed obliquely on the upper end of the straight plate (21), a positioning plate (23) is provided below the straight plate (21), and the upper end of the positioning plate (23) is rotationally connected to the lower end of the straight plate (21) through a hinge seat (27). The limiting assembly includes a positioning plate (23) rotationally arranged, a positioning strip (24) is welded to the inner middle part of the positioning plate (23), a semicircular strip (25) is fixedly installed on the other side of the positioning strip (24), the semicircular strip (25) and the positioning strip (24) are provided in two, and the semicircular strips (25) are symmetrically arranged, a spring (26) is fixedly installed on the inner side of the upper end of the positioning plate (23), the other end of the spring (26) is fixedly connected to the inner wall of the upper end of the accommodating cavity (2), and a fixing strip (28) is provided on the lower end of the positioning plate (23), and the fixing strip (28) is fixedly connected to the positioning plate (23) by a fastening screw.

2. The constant stress cement strength press of claim 1 wherein: The lower end of the inclined plate (22) forms a thirty-degree angle with the upper end of the straight plate (21), and the size of the positioning plate (23) is smaller than the size of the inner cavity of the accommodating cavity (2).

3. The constant-stress cement strength press of claim 1 or 2, wherein: The jacking assembly includes a jacking frame (3), the two sides of the jacking frame (3) are movably penetrated with the two sides of the support strip (16), a lead screw sleeve (31) is fixedly installed on the middle part of the jacking frame (3), a fixing rod (32) is welded on the upper end of the jacking frame (3), a ball (33) is fixedly installed on the side of the fixing rod (32) close to the positioning plate (23), and the smooth surface of the ball (33) is in close contact with the inner side of the positioning plate (23).

4. The constant stress cement strength press of claim 3 wherein: A servo motor (36) is fixedly installed on the lower end of the support base (13), a lead screw (37) is installed on the output end of the servo motor (36), the size of the lead screw (37) is matched with the size of the lead screw sleeve (31), and the lead screw (37) is threadedly connected with the lead screw sleeve (31).

5. The constant-stress cement strength press of claim 4, wherein: The upper end middle part of the fixing frame (14) is fixedly installed with a first hydraulic cylinder (4), the output end of the first hydraulic cylinder (4) is installed with an upper pressing plate (5), the upper end middle part of the supporting strip (16) is fixedly installed with a second hydraulic cylinder (6), the output end of the second hydraulic cylinder (6) is installed with a lower pressing plate (7), the upper pressing plate (5) and the lower pressing plate (7) are on the same vertical plane, the lower end side of the accommodating cavity (2) is provided with a discharging channel (8), and the discharging channel (8) is communicated with the accommodating cavity (2).

6. The constant-stress cement strength press of claim 5, wherein: The upper end side of the fixing frame (14) is provided with a putting channel (15), and the lower end of the putting channel (15) is flush with the upper end of the inclined plate (22).

7. The constant-stress cement strength press of claim 6 wherein: The two side inner walls of the accommodating cavity (2) are provided with sliding grooves (35), the side close to the sliding groove (35) of the fixing rod (32) is welded with a sliding block (34), the size of the sliding block (34) is matched with the size of the sliding groove (35), and the sliding block (34) is slidably connected with the sliding groove (35).

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