Grouting stopping device for fair-faced concrete formwork abutted seam

Abstract

The invention provides a grout stopping device for a fair-faced concrete formwork abutted seam, which belongs to the technical field of building construction and comprises a main body frame, a grout stopping plate, a locking assembly and a shockproof structure. The main body frame is composed of a base and left and right supports and provides stable support. The grout stopping plate is mounted on the connecting seats on the two sides through a connecting shaft and is provided with a wedge-shaped abutting part and a sealing rubber strip; the locking assembly is located at the top connecting groove of the grout stopping plate. The shockproof structure comprises a shock absorption body, a shockproof elastic plate and a connecting arm, and a multi-stage shock absorption system is formed. The adjusting rod and the adjusting frame can adjust the swing range of the connecting arm, and the stabilizing spring limits excessive swing of the shockproof elastic plate. The device is further provided with a driving motor, an adjusting motor and a force sensor, and accurate control is achieved; and the telescopic cylinder is matched with the rotating shaft to quickly open and close the grout stopping plate, so that the problem of sealing stability in a vibration environment is effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a grout-stopping device for joints of fair-faced concrete formwork. Background Art

[0002] As a high-quality building material, bare concrete is widely used in various iconic buildings and high-end projects. During bare concrete construction, the effectiveness of grouting at formwork joints directly impacts the quality of the finished product. Traditional grouting devices typically use rubber strips, sealing tape, or metal beading to seal the joints. These methods provide basic sealing in static environments. However, in actual construction, the pouring and vibrating processes generate continuous vibration and impact forces.

[0003] Existing grout stoppers commonly suffer from sealing instability and easy loosening and dislodging when exposed to vibration. Due to the large fluctuations in vibration frequency and pressure during concrete pouring, traditional grout stoppers lack effective shock absorption mechanisms. This leads to deformation and loosening of the sealing structure under vibration, making it impossible to maintain a stable and consistent seal. This is especially true in large-scale projects, where formwork joints often experience greater vibration loads, further increasing the risk of seal failure.

[0004] Therefore, designing a grouting device capable of maintaining a stable sealing effect in a vibrating concrete environment has become a pressing technical challenge in the field of exposed concrete construction. Existing technologies struggle to effectively address the issue of grouting stability in a vibrating environment, leading to surface defects such as grout leakage, honeycombing, and roughness on the exposed concrete surface, impacting the aesthetics and structural safety of the building. This means that existing technologies present a technical problem: the sealing effect of grouting devices for exposed concrete formwork joints remains unstable in a vibrating environment. Summary of the Invention

[0005] In view of this, the present invention provides a grouting device for the joints of plain concrete formwork, which can solve the technical problem in the prior art that the sealing effect of the grouting device for the joints of plain concrete formwork is unstable under a vibration environment.

[0006] The present invention is implemented as follows: the present invention provides a grouting device for the joints of plain concrete formwork, comprising: a main frame, a grouting plate, a locking assembly and a shockproof structure; the grouting plate is mounted on the main frame, a connecting groove is provided on the top of the grouting plate, and the locking assembly is mounted at the connecting groove; a pressing port is provided on the locking assembly, and the shockproof structure is mounted at the pressing port; the shockproof structure comprises a shock-absorbing body, a shock-absorbing elastic plate and a connecting arm, the shock-absorbing body is fixedly arranged at the upper end of the locking assembly at the pressing port; the middle part of the shock-absorbing body is connected by a rotating shaft The shock-proof elastic plate is rotatably connected, and both sides of the shock-proof elastic plate are against the inner wall of the shock-absorbing body; an adjusting rod is rotatably connected to the inside of the stop-slurry plate, and an adjusting frame is fixedly connected to the outside of the adjusting rod, and the adjusting frame rotates to form an adjustment area; the connecting arm is fixedly connected to the bottom central axis position of the shock-proof elastic plate, and the lower end of the connecting arm extends into the adjustment area of the stop-slurry plate, and the adjusting frame rotates to the top and drives the connecting arm to swing; at least two groups of symmetrically distributed stabilizing springs are installed between the two sides of the connecting arm and the inner wall of the shock-absorbing body.

[0007] Among them, the main frame includes a base, on which a left bracket and a right bracket are symmetrically arranged on the left and right sides; a left connecting seat is fixed on the left bracket of the main frame, and a right connecting seat is fixed on the right bracket of the main frame, and the stop plate is rotatably installed on the right connecting seat and the left connecting seat through a connecting shaft; a fixed seat is also fixed on the base, and a drive motor is fixed on the fixed seat, and the power output end of the drive motor is connected to the connecting shaft at the left end of the stop plate through a transmission.

[0008] Among them, the right connecting seat includes a right seat body and a reinforcing support rod; the right seat body is fixedly mounted on the right side bracket through at least three circumferentially distributed reinforcing support rods; the connecting shaft at the right end of the stop plate is a hollow shaft, and is rotatably mounted on the right seat body through a bearing; an adjusting motor is fixedly mounted on the right side bracket, and the adjusting motor is located between the reinforcing support rod and the right seat body, and the power output shaft of the adjusting motor passes through the inner hole of the connecting shaft at the right end of the stop plate, and is transmission-connected to the adjusting rod.

[0009] Among them, an upper force sensor and a lower force sensor are fixedly installed on the left bracket through fixing bars respectively, and the upper force sensor and the lower force sensor are located on the upper and lower sides of the left connecting seat and are symmetrically distributed in a circular pattern; a protrusion is fixed on the left end of the stop plate, and the protrusion is located between the upper force sensor and the lower force sensor, and can trigger the upper force sensor and the lower force sensor respectively; the upper force sensor and the lower force sensor limit the rotation of the stop plate through the protrusion.

[0010] Among them, wedge-shaped abutting parts are respectively provided on both sides of the slurry-stopping plate, and the wedge-shaped abutting parts abut against the edges of the joints of the concrete formwork to form a sealed slurry-stopping structure; the surface of the wedge-shaped abutting parts is provided with multiple sealing strips, and the sealing strips are distributed in a corrugated shape to enhance the slurry-stopping effect.

[0011] Among them, the left bracket and the right bracket are fixedly connected together through a transverse bracket; the transverse bracket is wrapped around the back of the stop plate; a reinforcing connecting plate is fixed to the upper end of the transverse bracket at a position corresponding to the connecting groove, and a rotating shaft is fixed to the rear side of the connecting groove, the rotating shaft is hinged to the reinforcing connecting plate, and a telescopic cylinder is fixed to the reinforcing connecting plate, the piston rod of the telescopic cylinder is connected to the rotating shaft, and the telescopic cylinder drives the rotating shaft to rotate to drive the stop plate to open and close.

[0012] Wherein, a plurality of reinforcing ribs are also provided on the outer wall of the slurry-stopping plate.

[0013] Wherein, an annular groove is provided on the inner side wall of the slurry stopping plate.

[0014] Wherein, a cross-shaped groove is provided on the inner side wall of the slurry stopping plate.

[0015] The distribution of the seismic structure follows the following equation: Wherein: is the optimal distribution distance of the seismic structure, L is the length of the slurry-stopping plate, H is the height of the slurry-stopping plate, K is the concrete vibration frequency coefficient, N is the number of the seismic structures, P is the concrete slurry pressure, F is the template joint tension, and α is the safety factor; the game equation is used to calculate the optimal distribution distance of the seismic structure in the slurry-stopping device, and the input includes the length of the slurry-stopping plate, the height of the slurry-stopping plate, the concrete vibration frequency coefficient, the number of the seismic structures, the concrete slurry pressure and the template joint tension, and the output is the optimal spacing between the seismic structures, ensuring the best seismic effect while preventing the structures from being overly concentrated or dispersed.

[0016] Compared to existing technologies, the present invention provides a grout-stopping device for exposed concrete formwork joints. By designing a combination of a main frame, grout-stopping plate, locking assembly, and shock-absorbing structure, this device achieves stable sealing in vibrating environments. The shock-absorbing structure, comprising a shock-absorbing body, shock-absorbing elastic plate, and connecting arm, forms a complete vibration response system that effectively absorbs and cushions the impact force generated during concrete vibration.

[0017] Compared to traditional grouting devices, this invention utilizes a multi-stage shock-absorbing system, combining a shock-absorbing elastic plate with a damping body, coupled with stabilizing springs on both sides. This effectively addresses the issue of loosening of the sealing structure under vibrating conditions. When the concrete vibrates, the shock-absorbing structure intelligently responds to the vibration load, absorbing and buffering the vibration through the coordination of the connecting arm and the adjustment frame, maintaining a stable fit between the grouting plate and the formwork joint. Furthermore, the design of the wedge-shaped abutment and corrugated sealing strip further enhances the sealing effect.

[0018] Therefore, the present invention successfully solves the technical problem of unstable sealing effect of the grouting device of the plain concrete formwork under a vibration environment, significantly improves the construction quality and efficiency of plain concrete, reduces the incidence of defects such as leakage and honeycomb, and has important engineering application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a slurry stopping device of the present invention;

[0020] Figure 2 A side view of the slurry stopping device of the present invention

[0021] Figure 3 It is a top schematic diagram of the slurry stopping device of the present invention;

[0022] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0023] 1. Main frame; 11. Base; 12. Left bracket; 121. Left connecting seat; 13. Right bracket; 131. Right connecting seat; 2. Stop plate; 21. Connecting groove; 22. Adjusting rod; 23. Adjusting frame; 3. Locking assembly; 31. Pressing mouth; 4. Shockproof structure; 41. Shock-absorbing body; 42. Shock-proof elastic plate; 43. Connecting arm. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] like Figure 1-Figure 3 The figure shows a schematic structural diagram of a grouting device for joints of plain concrete formwork provided by the present invention. The grouting device for joints of plain concrete formwork provided by the present invention mainly consists of four core parts: a main frame, a grouting plate, a locking assembly and a shockproof structure.

[0026] The main frame 1, which supports the entire device, is constructed from Q235 steel and comprises a base 11, a left bracket 12, and a right bracket 13, forming a stable "U"-shaped support structure. The base is equipped with mounting holes for securing the device at the construction site. Connecting brackets are fixed to the left and right brackets, respectively, to support and connect the slurry control plate. The base also features a fixed bracket, which houses the drive motor, which is connected to the slurry control plate's connecting shaft via a transmission.

[0027] The slurry-stopping plate 2 is the core working component of the device. Made of high-strength polyurethane, it features wedge-shaped abutments on both sides, which contact the edges of the concrete formwork joints to form a seal. The surface of the wedge-shaped abutments is covered with multiple, corrugated sealing strips to enhance the slurry-stopping effect. A T-shaped connecting groove 21 is located at the top of the slurry-stopping plate, which is rotatably connected to an adjustment rod 22 inside and fixed to an adjustment bracket 23 on the outside. The outer wall of the slurry-stopping plate is equipped with multiple X-shaped reinforcing ribs, and the inner wall is equipped with annular and cross-shaped grooves to enhance overall strength and sealing effectiveness.

[0028] The locking assembly 3, installed in the connection slot at the top of the slurry stop plate, consists of a locking plate, locking bolts, and a compression spring. The locking plate has evenly distributed compression openings 31 for attaching the shockproof structure. The locking assembly provides uniform pressure through the bolts and spring, ensuring a secure and reliable connection.

[0029] The shockproof structure 4 is the innovative feature of the present invention, and includes a shock-absorbing body 41, a shock-absorbing elastic plate 42, and a connecting arm 43. The shock-absorbing body is fixed at the pressing port, and is internally connected to the shock-absorbing elastic plate via a rotating shaft. A slender rod-shaped connecting arm is connected to the bottom of the shock-absorbing elastic plate, extending to the adjustment area of the slurry stop plate. Symmetrically distributed stabilizing springs are installed between the two sides of the connecting arm and the inner wall of the shock-absorbing body to provide lateral support force. When the concrete is vibrated, the shock-absorbing structure can effectively absorb the vibration energy and prevent the vibration from causing leakage of slurry in the template joints.

[0030] The device is also equipped with auxiliary devices such as upper and lower force sensors and telescopic cylinders, and operates automatically via an electrical control system. The distribution of the seismic structure follows an optimization equation, calculating the optimal spacing based on the size of the grouting plates, concrete properties, and construction conditions to ensure optimal grouting effectiveness. The device boasts a rational structural design and clearly defined components, effectively addressing grouting leakage between formwork joints during exposed concrete construction and improving project quality.

[0031] The device of the present invention is described in more detail below.

[0032] The slurry-stopping device of the present invention is mainly composed of four main parts: a main frame, a slurry-stopping plate, a locking assembly and a shockproof structure. The main frame serves as the supporting base of the entire device. It is made of high-strength Q235 steel and its surface is treated with rust prevention. It has good load-bearing capacity and durability. The main frame includes a base, a left bracket and a right bracket. The base is stamped from steel plates and has a rectangular structure. A mounting hole is provided at the bottom for fixing the device at the construction site. The left bracket and the right bracket are symmetrically arranged at both ends of the base. They are made of square steel and are firmly connected to the base by welding to form a stable "U"-shaped support structure. A left connecting seat 121 is fixed on the left bracket, and a right connecting seat 131 is fixed on the right bracket. These two connecting seats are used to support and connect the slurry-stopping plate.

[0033] The left connecting seat is made of aluminum alloy and is cylindrical in shape. It has a bearing hole inside for installing the connecting bearing. The right connecting seat has a more complex structure, including a right seat body and at least three reinforcing rods. The right seat body is also made of aluminum alloy and has a similar shape to the left connecting seat, but the internal bearing hole is hollow and is used to pass the power output shaft of the adjustment motor. The reinforcing rods are evenly distributed around the circumference and are made of stainless steel round steel. One end is welded to the right seat body and the other end is welded to the right bracket, forming a stable triangular support structure, which effectively improves the stability and load-bearing capacity of the right connecting seat.

[0034] Affixed to the base is a fixed base. This base is made of cast iron and is L-shaped. It is bolted to the base. A three-phase asynchronous drive motor is mounted on the base and bolted to the base. The drive motor's power output is connected to the connecting shaft on the left end of the stop plate via a transmission. The transmission utilizes a coupling structure made of 45-gauge steel and features a keyway. This keyed connection connects the motor shaft and the connecting shaft to ensure reliable and stable transmission.

[0035] The slurry stop plate is the core component of this device. It is in direct contact with the joint of the concrete formwork and plays a role in preventing the leakage of concrete slurry. The slurry stop plate is made of high-strength polyurethane material and has excellent elasticity, wear resistance and corrosion resistance. The slurry stop plate is a rectangular plate as a whole, with wedge-shaped abutment parts on both sides. The wedge-shaped abutment parts abut against the joint edge of the concrete formwork to form a sealed slurry stop structure. There are multiple sealing strips on the surface of the wedge-shaped abutment part. The sealing strips are made of nitrile rubber material and are distributed in a corrugated shape. The corrugated distribution frequency of the sealing strip is according to the formula Calculation can ensure the sealing effect without excessively increasing the friction resistance.

[0036] The top of the slurry stop plate features a T-shaped connection slot. This slot houses a locking assembly consisting of a locking plate, locking bolts, and a compression spring. The locking plate is made of 304 stainless steel, and the standard locking bolts are evenly distributed across the plate. The compression spring, positioned between the locking plate and the connection slot, provides uniform compression, ensuring a secure and reliable connection between the locking assembly and the slurry stop plate.

[0037] A clamping port is provided on the locking assembly. The clamping port is rectangular and evenly distributed along the length of the locking plate. A shockproof structure is installed at the clamping port. The shockproof structure is one of the innovative features of the present invention, which is used to reduce the impact of vibration generated during concrete vibration on the grouting effect. The shockproof structure includes a shock-absorbing body, a shock-absorbing elastic plate and a connecting arm. The shock-absorbing body is made of high-strength nylon material, is in the shape of a square box, and is hollow inside. The shock-absorbing body is fixedly arranged at the upper end of the locking assembly at the clamping port and is connected by a snap-fit method, which is convenient for disassembly and assembly.

[0038] The center of the shock absorber body is rotatably connected to a shock-absorbing elastic plate via a rotating shaft. The shaft is made of 304 stainless steel and has anti-loosening threads at both ends. The shock-absorbing elastic plate is made of carbon fiber reinforced composite material, which has excellent elasticity and fatigue resistance. The two sides of the shock-absorbing elastic plate are aligned with the inner wall of the shock absorber body, absorbing vibration energy through elastic deformation. A connecting arm is fixedly connected to the bottom center axis of the shock-absorbing elastic plate. The connecting arm is made of high-strength aluminum alloy and is shaped like a slender rod. The upper end is riveted to the shock-absorbing elastic plate, and the lower end extends into the adjustment area of the stop plate.

[0039] An adjustment rod, made of 304 stainless steel, rotates inside the stop plate. Connected to the stop plate via a bearing, it rotates freely within the plate. A curved adjustment bracket, made of spring steel, is fixed to the outside of the adjustment rod and welded to the adjustment rod. The bracket rotates to create a fan-shaped adjustment area. When the bracket is rotated upward, the connecting arm can be moved to adjust the angle and preload of the shock-absorbing elastic plate to suit varying construction conditions and concrete slurry pressure.

[0040] At least two sets of symmetrically distributed stabilizing springs are installed between the two sides of the connecting arm and the inner wall of the shock absorber body. The stabilizing springs are made of high-quality spring steel. The stabilizing springs provide lateral support for the connecting arm to prevent the connecting arm from excessive lateral displacement during vibration, ensuring the stable operation of the shock-absorbing elastic plate. The total elastic force provided by the stabilizing spring can be calculated by the formula calculate.

[0041] An upper force sensor and a lower force sensor are fixedly installed on the left bracket through a fixing bar. The fixing bar is made of Q235 steel and is connected to the left bracket by bolts. The upper force sensor and the lower force sensor are piezoresistive force sensors, which are connected to the control system through shielded cables. The upper force sensor and the lower force sensor are located on the upper and lower sides of the left connecting seat and are symmetrically distributed in a circular pattern. A bump is fixed on the left end of the stop plate. The bump is made of Q235 steel, is semicircular, and is connected to the stop plate by welding. The bump is located between the upper force sensor and the lower force sensor, and can trigger the upper force sensor and the lower force sensor respectively. When the stop plate rotates to the extreme position, the bump will press on the corresponding force sensor, generating a signal to feed back to the control system, thereby realizing the limit control of the rotation of the stop plate.

[0042] The left and right brackets are fixedly connected by a transverse bracket. Made of square steel, the transverse bracket is welded to the left and right brackets to form a stable frame structure. The transverse bracket wraps around the rear of the stop plate, maintaining an appropriate gap to prevent interference with its operation. A reinforcing connecting plate, made of Q235 steel, is fixed to the upper end of the transverse bracket, corresponding to the connection slot. A rotating shaft, made of 45-gauge steel, is fixed to the rear of the connection slot and connected to the stop plate via a bearing. The rotating shaft is hinged to the reinforcing connecting plate, creating a secure rotational connection. A double-acting telescopic cylinder is fixed to the reinforcing connecting plate via a flange connection. The piston rod of the telescopic cylinder is connected to the rotating shaft via a pin connection for safe and reliable transmission. The telescopic cylinder rotates the rotating shaft, thereby opening and closing the stop plate, achieving automatic control of the stop plate.

[0043] The outer wall of the stop plate is also provided with a plurality of reinforcing ribs. The reinforcing ribs are made of the same material as the stop plate and are connected to the stop plate through an integrated mold forming process. The reinforcing ribs are evenly distributed along the length of the stop plate and are arranged in an "X" shape, which effectively improves the overall rigidity and bending strength of the stop plate. An annular groove is provided on the inner wall of the stop plate, and the annular groove is formed by turning. The annular groove is used to accommodate a sealing ring to prevent the concrete slurry from penetrating into the interior of the stop plate. A cross-shaped groove is also provided on the inner wall of the stop plate, and the cross-shaped groove is formed by machining at a CNC machining center. The function of the cross-shaped groove is to increase the friction between the inner wall of the stop plate and the concrete slurry, prevent the concrete slurry from sliding on the inner wall of the stop plate, and improve the stop effect.

[0044] The distribution of the anti-seismic structure in the grouting device is one of the key technical points of the present invention, and its optimal distribution distance can be obtained by the equation Calculation. The parameters are obtained as follows: L and H are obtained by directly measuring the actual dimensions of the mortar stop plate; K is calculated by experimentally measuring the concrete vibration frequency and combining it with the formwork material properties; N is determined based on design requirements; P is obtained through theoretical calculation or actual measurement; F is obtained by measuring the actual tension at the formwork joint using a force sensor; and α is determined based on construction conditions and safety requirements.

[0045] The use process of the device of the present invention first requires parameter preset, and appropriate device parameters are selected according to the characteristics of the concrete project and the size of the formwork joints. Check each component before installation to ensure that they are intact. During installation, fix the base in a stable position at the construction site, and adjust the left and right brackets so that the stop plate is aligned with the formwork joints. Install the seismic structure according to the calculated optimal distribution distance, connect the electrical control system, and set the control parameters. After the functional test is completed, unfold the stop plate and make close contact with the formwork joints before pouring the concrete to form a seal. During the pouring and vibration of concrete, the seismic structure absorbs vibration energy to prevent leakage. After the initial setting of the concrete, slowly separate the stop device to avoid damaging the concrete surface. Clean the various components of the device after use, especially the stop plate and sealing strips, and perform necessary maintenance to ensure that they are in good condition the next time they are used.

[0046] The mathematical model or calculation process involved in the present invention is described in detail below.

[0047] The optimization equation for the distribution of seismic structures is used to calculate the optimal distribution distance of seismic structures in the grouting device, which is specifically expressed as follows:

[0048]

[0049] Where D is the optimal distribution distance of the seismic structure, in millimeters (mm); L is the length of the stop plate, in millimeters (mm); H is the height of the stop plate, in millimeters (mm); K is the concrete vibration frequency coefficient, dimensionless; N is the number of seismic structures, in units; P is the concrete slurry pressure, in megapascals (MPa); F is the formwork joint tension, in megapascals (MPa); and α is the safety factor, dimensionless.

[0050] The parameter acquisition method is:

[0051] L is obtained by actually measuring the length of the stop plate using a precision tape measure or laser rangefinder. When measuring, ensure that the measuring points are at the two end edges of the stop plate.

[0052] H is obtained by actually measuring the height of the stop plate using a precision tape measure or laser rangefinder. When measuring, ensure that the measuring points are at the upper and lower edges of the stop plate.

[0053] The calculation formula of K is:

[0054]

[0055] Where, f c is the actual concrete vibration frequency in Hertz (Hz), usually ranging from 40 to 100 Hz; f0 is the standard vibration frequency, which is 50 Hz; β is the vibration transfer coefficient, which is related to the formwork material and thickness, and usually ranges from 0.8 to 1.2.

[0056] f c The method for obtaining the frequency is to use a vibration frequency measuring instrument to directly measure the vibration frequency of the concrete vibrator when it is working.

[0057] The calculation formula for β is:

[0058]

[0059] Where, t m is the template thickness, in millimeters (mm); E m is the elastic modulus of the template material, in MPa.

[0060] N is a design parameter, which is determined comprehensively based on the length and pressure of the stop plate. The calculation formula is:

[0061]

[0062] Where, Represents the ceiling function.

[0063] The calculation formula for P is:

[0064] P=ρ c ×g×h×γ;

[0065] Where, ρ c is the density of concrete slurry, in kilograms per cubic meter (kg / m 3 ), generally takes the value as 2200~2400kg / m 3 ; g is the acceleration due to gravity, which is 9.8m / s 2 ; h is the pouring height, in meters (m); γ is the lateral pressure coefficient, dimensionless, usually ranging from 0.7 to 0.85.

[0066] The calculation formula for F is:

[0067]

[0068] Where, T is the tension at the joint, in Newton (N); A j is the joint contact area, in square millimeters (mm 2 ).

[0069] The calculation method of T is:

[0070]

[0071] Where, F i is the tension at the i-th fixed point, in Newton (N); θ i is the angle between the tension direction and the joint plane, in radians (rad); m is the number of fixed points.

[0072] A j The calculation method is:

[0073] A j =L×d j ;

[0074] Where, d j The width of the joint is in millimeters (mm).

[0075] The calculation formula for α is:

[0076]

[0077] Where σ v is the vibration intensity, in meters per square second (m / s 2 ); τ is the pouring duration, in hours (h).

[0078] σ v The measurement method is to use an acceleration sensor to measure the acceleration value of concrete during vibration, which is generally in the range of 1 to 5 m / s. 2 .

[0079] For the stability assessment of earthquake-resistant structures, it is also necessary to introduce the elastic force calculation of the stabilizing spring:

[0080]

[0081] Where, F s The total elastic force provided by the stabilizing spring, in Newtons (N); k j is the elastic constant of the jth group of stabilizing springs, in Newtons per millimeter (N / mm); x j is the deformation of the jth group of stabilizing springs, in millimeters (mm); k is the number of stabilizing spring groups, which must be at least 2.

[0082] When the connecting arm swings under the action of the adjustment frame, the angle change calculation formula of the shock-absorbing elastic plate is:

[0083]

[0084] Where θ is the deflection angle of the shockproof elastic plate, in radians (rad); d ais the displacement of the connecting arm end point, in millimeters (mm); l a is the length of the connecting arm in millimeters (mm).

[0085] The calculation formula for the shock absorption performance evaluation index of the earthquake-proof structure is:

[0086]

[0087] Where, E d is the shock absorption efficiency, dimensionless; A after A is the amplitude of concrete vibration transmitted to the template joint after the application of the earthquake-proof structure, in millimeters (mm); before It is the amplitude of concrete vibration transmitted to the formwork joint when no earthquake-proof structure is applied, in millimeters (mm).

[0088] In order to optimize the grout-stopping effect, the design angle calculation formula of the wedge-shaped abutment portion is:

[0089]

[0090] Where φ is the optimal angle of the wedge-shaped abutment, expressed in radians (rad); μ is the friction coefficient between the wedge-shaped abutment and the edge of the template joint, which is dimensionless and generally ranges from 0.2 to 0.5.

[0091] The calculation formula for the corrugation distribution frequency of the sealing strip is:

[0092]

[0093] Where, f g is the frequency of the corrugation distribution of the sealing strip, in units of per millimeter (pieces / mm); n g The number of corrugations of the sealing strip, in pieces; L g The length of the sealing strip is in millimeters (mm).

[0094] The principle of the seismic structure distribution optimization equation takes into account the following aspects:

[0095] 1. Proportional relationship: The optimal distribution distance D is proportional to the length L and height H of the stop plate. This is because larger stop plates require larger seismic structure spacing to cover the entire area.

[0096] 2. Concrete vibration frequency coefficient K: This coefficient reflects the degree of influence of concrete vibration on the structure. The higher the vibration frequency, the greater the impact on the structure, and a denser distribution of earthquake-proof structures is required. Therefore, K is proportional to D.

[0097] 3. Influence of pressure and tension: The sum of the concrete slurry pressure P and the formwork joint tension F reflects the overall stress that the slurry stop device needs to withstand. The greater the stress, the denser the seismic structure needs to be distributed to provide sufficient resistance. Therefore, D is inversely proportional to (P+F).

[0098] 4. Number of earthquake-proof structures N: The more earthquake-proof structures there are, the less stress each structure bears and the more evenly it can be distributed. Therefore, D is inversely proportional to N.

[0099] 5. Safety factor α: takes into account the impact of factors such as vibration intensity and pouring duration on safety redundancy to ensure that the system can still work effectively under extreme conditions.

[0100] The special feature of this optimization equation is that it takes into account the structural geometric characteristics (length, height), mechanical characteristics (pressure, tension) and dynamic characteristics (vibration frequency) at the same time. Through this comprehensive consideration, it can provide the optimal seismic structure distribution scheme for the grouting device under different working conditions, effectively improving the grouting effect and service life of the device.

[0101] Specifically, the principle of the present invention is as follows: The technical principle of the present invention is based on a mechanism that combines multi-stage shock absorption with adaptive sealing. Through systematic structural design, it achieves a stable stop effect in a vibrating environment. First, the main frame serves as the support foundation of the entire device, providing a stable mounting platform for the stop plate. The stop plate is installed on the left and right connecting seats via connecting shafts and can be precisely positioned under the control of the drive motor. The locking assembly is set in the connecting groove at the top of the stop plate to ensure the structural stability of the entire device.

[0102] The core of the present invention lies in the design principle of the shockproof structure. The shock-absorbing body is fixed to the upper end of the locking assembly and serves as the basic framework of the shockproof system. The shockproof elastic plate is rotatably connected to the shock-absorbing body via a rotating shaft and can undergo elastic deformation according to the vibration environment. The connecting arm is fixed to the central axis position at the bottom of the shockproof elastic plate, and the lower end extends into the adjustment area of the stop plate to form a vibration response mechanism. When the concrete vibrates, the vibration force is transmitted to the shockproof structure through the stop plate, and part of the energy is first absorbed by the shockproof elastic plate.

[0103] The design of the adjustment rod and adjustment bracket introduces a controllable element. Rotating the adjustment bracket changes the swing range of the connecting arm, enabling precise control of the shockproof parameters. Stabilizing springs on either side of the connecting arm form a second-stage shock absorption system, further absorbing vibration energy and limiting excessive swing of the shockproof elastic plate, maintaining system stability. This multi-stage shock absorption design ensures that the slurry stop device maintains optimal working conditions under different vibration frequencies and intensities.

[0104] In addition, the wedge-shaped abutment parts and corrugated sealing strips on both sides of the slurry stop plate enhance the contact area and sealing effect with the concrete formwork joints. According to the mathematical model in claim 10, the device also takes into account the optimal distribution distance of the seismic structure to ensure the coordinated operation of the entire system. The coordination of the telescopic cylinder and the rotating shaft allows the slurry stop plate to be quickly opened and closed when needed, improving the convenience of construction operations. The coordination of the left and right connecting seats and the force sensor achieves precise control of the rotation angle of the slurry stop plate and limit protection.

[0105] In summary, the present invention establishes a complete set of vibration response and sealing maintenance mechanisms through structural optimization and functional integration, which solves the stability problem of template joint grouting under vibration environment in principle.

[0106] A specific embodiment 1 of the present invention is provided below. The specific implementation of each step in this embodiment 1 is described in detail as follows.

[0107] The slurry-stopping device of this embodiment mainly consists of four main parts: a main frame, a slurry-stopping plate, a locking assembly, and a shockproof structure. The main frame serves as the supporting base of the entire device and is made of high-strength Q235 steel. The surface is rust-proofed and has good load-bearing capacity and durability. The main frame includes a base, a left bracket, and a right bracket. The base is stamped from a steel plate with a thickness of 8-12mm. It has a rectangular structure, a length of 600-800mm, a width of 120-150mm, and 4 mounting holes at the bottom for fixing the device at the construction site. The left bracket and the right bracket are symmetrically arranged at both ends of the base, with a height of 300-400mm. They are made of 40mm×40mm×4mm square steel and are firmly connected to the base by welding to form a stable "U"-shaped support structure. A left connecting seat is fixed on the left bracket, and a right connecting seat is fixed on the right bracket. These two connecting seats are used to support and connect the slurry-stopping plate.

[0108] The left connecting seat is made of aluminum alloy, cylindrical in shape, with a diameter of 60-80mm and a height of 40-50mm. It is equipped with a bearing hole with a diameter of 25-30mm inside for installing the connecting bearing. The structure of the right connecting seat is more complex, including a right seat body and at least three reinforcing rods. The right seat body is also made of aluminum alloy and has a similar shape to the left connecting seat, but the internal bearing hole is hollow with a diameter of 30-35mm for passing the power output shaft of the adjustment motor. The reinforcing rods are evenly distributed around the circumference and are made of stainless steel round steel with a diameter of 10-12mm. One end is welded to the right seat body and the other end is welded to the right bracket to form a stable triangular support structure, which effectively improves the stability and load-bearing capacity of the right connecting seat.

[0109] Affixed to the base is a fixed seat. Made of cast iron, it is L-shaped, 100-120mm high, 80-100mm wide, and 15-20mm thick, and is bolted to the base. Mounted on the fixed seat is a three-phase asynchronous drive motor with a power output of 0.75-1.5kW and a speed of 1400-1450rpm. It is bolted to the fixed seat. The drive motor's power output is connected to the connecting shaft on the left end of the stop plate via a transmission. The transmission utilizes a coupling structure made of No. 45 steel, with a diameter of 40-50mm and a length of 60-80mm. It features an internal keyway and is keyed to the motor shaft and connecting shaft, ensuring reliable and stable transmission.

[0110] The slurry stop plate is the core component of this device. It is in direct contact with the joint of the concrete formwork and plays a role in preventing the leakage of concrete slurry. The slurry stop plate is made of high-strength polyurethane material and has excellent elasticity, wear resistance and corrosion resistance. The slurry stop plate is a rectangular plate with a length of 500-700mm, a width of 80-100mm and a thickness of 15-20mm. Wedge-shaped abutment parts are provided on both sides of the slurry stop plate. The angle of the wedge-shaped abutment part is 30°-45°, which abuts against the edge of the joint of the concrete formwork to form a sealed slurry stop structure. A plurality of sealing strips are provided on the surface of the wedge-shaped abutment part. The sealing strips are made of nitrile rubber material and are distributed in a corrugated shape. The width of each strip is 3-5mm, the height is 2-3mm, and the distance between adjacent strips is 5-8mm. The corrugated distribution frequency of the sealing strip is calculated according to the following formula: where f g n is the frequency of the corrugation distribution of the sealing strip, in units of per millimeter (pieces / mm); g The number of corrugations of the sealing strip, in pieces; L g is the length of the sealing strip, in millimeters (mm). According to actual experience, f g The optimal value range is 0.15-0.25 pieces / mm, which can ensure the sealing effect without excessively increasing the friction resistance.

[0111] The top of the slurry stop plate features a T-shaped connection groove, 10-15mm deep, 20-25mm wide, and the same length as the slurry stop plate. The connection groove houses a locking assembly consisting of a locking plate, locking bolt, and a compression spring. The locking plate is made of 304 stainless steel, 5-8mm thick, 25-30mm wide, and the same length as the connection groove. The locking bolts are M8-M10, 30-40mm long, and made of 304 stainless steel. They are evenly spaced every 100-150mm on the locking plate. The compression spring, located between the locking plate and the connection groove and with a spring stiffness of 2-3N / mm and a free length of 20-25mm, is compressed to 10-12mm. This provides uniform compression, ensuring a secure and reliable connection between the locking assembly and the slurry stop plate.

[0112] A clamping port is provided on the locking assembly. The clamping port is rectangular, with a width of 15-20mm and a depth of 10-12mm. It is evenly distributed along the length of the locking plate with a spacing of 150-200mm. A shockproof structure is installed at the clamping port. The shockproof structure is one of the innovative points of the present invention, which is used to reduce the impact of vibration generated during the concrete vibration process on the slurry stopping effect. The shockproof structure includes a shock-absorbing body, a shock-absorbing elastic plate and a connecting arm. The shock-absorbing body is made of high-strength nylon material and is in the shape of a square box with a length of 40-50mm, a width of 35-45mm, a height of 25-30mm, a hollow interior and a wall thickness of 4-5mm. The shock-absorbing body is fixedly arranged at the upper end of the locking assembly at the clamping port and is connected by a snap-fit method for easy disassembly and assembly.

[0113] The middle part of the shock-absorbing body is rotatably connected to a shock-proof elastic plate via a rotating shaft. The rotating shaft is made of 304 stainless steel, with a diameter of 5-6mm, a length of 40-45mm, and anti-loosening threads at both ends. The shock-proof elastic plate is made of carbon fiber reinforced composite material, with a thickness of 2-3mm, a width of 30-35mm, and a length of 35-40mm, and has good elasticity and fatigue resistance. The two sides of the shock-proof elastic plate are against the inner wall of the shock-absorbing body, absorbing vibration energy through elastic deformation. A connecting arm is fixedly connected to the bottom center axis of the shock-proof elastic plate. The connecting arm is made of high-strength aluminum alloy material, in the shape of a slender rod, with a diameter of 3-4mm and a length of 50-60mm. The upper end is connected to the shock-proof elastic plate by riveting, and the lower end extends into the adjustment area of the stop plate.

[0114] An adjustment rod is rotatably connected to the inside of the stop plate. The adjustment rod is made of 304 stainless steel, has a diameter of 8-10mm, and a length of 480-650mm. It is connected to the stop plate through a bearing and can rotate freely inside the stop plate. The adjustment rod is fixedly connected to the outside of the adjustment rod with an adjustment frame. The adjustment frame is made of spring steel and has an arc-shaped structure with a radius of 15-20mm, a thickness of 1.5-2mm, and a width of 10-12mm. It is connected to the adjustment rod by welding. The adjustment frame rotates to form an adjustment area, which is fan-shaped and has an angle of 60°-90°. When the adjustment frame is rotated to the top, the connecting arm can be moved to swing, thereby adjusting the angle and preload of the shock-absorbing elastic plate to adapt to different construction conditions and concrete slurry pressure.

[0115] At least two sets of symmetrically spaced stabilizing springs are installed between each side of the connecting arm and the inner wall of the shock absorber body. These stabilizing springs are made of high-quality spring steel, with a wire diameter of 0.8-1.0mm, an outer diameter of 8-10mm, a free length of 15-18mm, and a spring stiffness of 1.5-2.0N / mm. The stabilizing springs provide lateral support for the connecting arm, preventing excessive lateral displacement during vibration and ensuring the stable operation of the shock-absorbing elastic plate. The total elastic force provided by the stabilizing springs can be calculated using the following formula: Among them F s The total elastic force provided by the stabilizing spring, in Newtons (N); k j is the elastic constant of the jth group of stabilizing springs, in Newtons per millimeter (N / mm); x j is the deformation of the jth group of stabilizing springs, in millimeters (mm); k is the number of stabilizing spring groups, which must be at least 2.

[0116] The upper and lower force sensors are fixed to the left bracket via fixing strips. The fixing strips are made of Q235 steel, have a thickness of 3-4mm, a width of 20-25mm, and a length of 40-50mm. They are connected to the left bracket via bolts. The upper and lower force sensors are piezoresistive force sensors with a range of 0-500N, an accuracy of ±0.5% FS, and an output signal of 4-20mA. They are connected to the control system via shielded cables. The upper and lower force sensors are located on the upper and lower sides of the left connecting seat and are symmetrically distributed around the circumference at an angle of 180°. A bump is fixed to the left end of the stop plate. The bump is made of Q235 steel, has a semicircular shape, a radius of 8-10mm, and a thickness of 5-6mm. It is connected to the stop plate by welding. The bump is located between the upper force sensor and the lower force sensor, and can trigger the upper force sensor and the lower force sensor respectively. When the stop plate rotates to the extreme position, the bump will press on the corresponding force sensor, generating a signal feedback to the control system, thereby realizing the limit control of the rotation of the stop plate.

[0117] The left and right brackets are fixedly connected by a transverse bracket. Made of 40mm x 40mm x 4mm square steel and with a length comparable to the base width, the transverse bracket is welded to the left and right brackets to form a stable frame structure. The transverse bracket wraps around the back of the stop plate, maintaining a 10-15mm gap with it to avoid interfering with its normal operation. A reinforcing connecting plate is fixed to the upper end of the transverse bracket corresponding to the connection slot. This reinforcing connecting plate is made of Q235 steel, 5-6mm thick, 60-70mm wide, and 80-100mm long, and is welded to the transverse bracket. A rotating shaft is fixed to the rear of the connection slot. Made of No. 45 steel, it has a diameter of 12-15mm and a length of 40-50mm. It is connected to the stop plate via a bearing. The rotating shaft is hinged to the reinforcing connecting plate, forming a reliable rotational connection. A double-acting telescopic cylinder is fixed to the reinforced connecting plate. It has a diameter of 40-50mm, a stroke of 60-80mm, and an operating pressure of 0.4-0.6MPa. It is secured to the reinforced connecting plate via a flange connection. The cylinder's piston rod is connected to the rotating shaft via a pin connection, ensuring safe and reliable transmission. The cylinder drives the rotating shaft, which in turn opens and closes the stop plate, achieving automatic control of the stop plate.

[0118] The outer wall of the slurry stop plate is also equipped with multiple reinforcing ribs. These ribs are made of the same material as the slurry stop plate, have a thickness of 3-4mm, a height of 8-10mm, and a length of 60-80mm. They are integrated with the slurry stop plate through a one-piece mold forming process. The reinforcing ribs are evenly distributed along the length of the slurry stop plate, with a spacing of 100-120mm, arranged in an "X" shape, effectively increasing the overall rigidity and bending strength of the slurry stop plate. An annular groove is provided on the inner wall of the slurry stop plate. The groove has a width of 5-6mm, a depth of 3-4mm, and a diameter equal to the inner diameter of the slurry stop plate. The groove is formed by turning. The annular groove is used to accommodate a sealing ring to prevent concrete slurry from seeping into the interior of the slurry stop plate. The inner wall of the slurry stop plate is also equipped with a cross-shaped groove. The groove has a width of 3-4mm and a depth of 2-3mm. The groove is formed by machining on a CNC machining center. The function of the cross-shaped groove is to increase the friction between the inner wall of the slurry-stopping plate and the concrete slurry, prevent the concrete slurry from sliding on the inner wall of the slurry-stopping plate, and improve the slurry-stopping effect.

[0119] The distribution of the seismic structure in the grouting device is one of the key technical points of the present invention. The optimal distribution distance can be calculated by the following equation: Where D is the optimal spacing of the seismic structures (in millimeters); L is the length of the stop plate (in millimeters); H is the height of the stop plate (in millimeters); K is the dimensionless concrete vibration frequency coefficient; N is the number of seismic structures (in units); P is the concrete slurry pressure (in megapascals); F is the formwork joint tension (in megapascals); and α is the dimensionless safety factor. These parameters are obtained as follows: L and H are obtained by directly measuring the actual dimensions of the stop plate; K is calculated by experimentally measuring the concrete vibration frequency and combining it with the formwork material properties; N is determined based on design requirements and is generally 4-8; P is obtained through theoretical calculation or actual measurement; F is obtained by measuring the actual tension in the formwork joint with a force sensor; α is determined based on construction conditions and safety requirements and is generally 1.2-1.5.

[0120] The device of this embodiment is used as follows: First, select a grouting device of appropriate specifications based on the actual size and position of the concrete formwork joint. Secure the base of the grouting device in a stable location at the construction site, ensuring that the device is aligned with the formwork joint. Start the drive motor via the control panel and adjust the position of the grouting plate so that the wedge-shaped abutment is in close contact with the edge of the concrete formwork joint. Adjust the position of the adjustment frame by adjusting the motor's rotation lever according to the design pressure and vibration frequency of the concrete slurry, thereby adjusting the preload of the shock-absorbing elastic plate to ensure optimal shockproofing. Start the telescopic cylinder to fully close the grouting plate, forming an effective grouting structure. Begin pouring concrete. When the concrete slurry reaches the grouting plate, the shock-absorbing structure automatically absorbs and buffers the vibration energy during concrete vibration, preventing leakage from the formwork joint caused by vibration. After pouring is completed, wait for the concrete to initially set, start the telescopic cylinder to open the grouting plate, and carefully remove the grouting device. Clean all components of the grouting device, especially the wedge-shaped abutment of the grouting plate and the sealing strip, to prepare for the next use.

[0121] Specifically, the specific implementation method of the use process of the plain concrete formwork joint grouting device of this embodiment is described as follows. This implementation method fully considers the seismic structure distribution optimization equation and its related parameters to ensure the best grouting effect in practical applications.

[0122] Before formal construction begins, the device parameters must be preset based on the characteristics of the concrete project. Technicians must measure the specific dimensions of the joints in the exposed concrete formwork, including joint length, width, and depth. Use a precision tape measure or laser rangefinder to measure the length L and height H of the stop plate, as these two parameters directly affect the distribution of the seismic structure. Subsequently, the concrete vibration frequency coefficient K is determined based on the concrete mix ratio and construction plan. This coefficient can be used to measure the actual operating frequency f of the concrete vibrator using a vibration frequency meter. c , and then according to the formula The calculation shows that the standard vibration frequency f0 is 50Hz, and the vibration transmission coefficient β is calculated according to the template material and thickness through the formula The concrete slurry pressure P is obtained by the formula P = ρ c ×g×h×γ, where the density of concrete slurry is ρ c The general value is 2200~2400kg / m 3 , the acceleration due to gravity g is 9.8m / s 2 The pouring height h is the actual construction parameter, and the lateral pressure coefficient γ is usually between 0.7 and 0.85. The template joint tension F needs to be measured by a tension sensor to measure the actual tension T at the joint, and then combined with the joint contact area A j , through the formula Calculated.

[0123] According to the above parameters, the seismic structure distribution optimization equation is used Calculate the optimal distribution distance D of the earthquake-proof structure. The safety factor α is determined according to the construction site conditions and safety requirements, and is usually set at 1.2 to 1.5. The number of earthquake-proof structures N can be calculated by the formula The actual number and spacing of the seismic protection structures on the device are calculated and adjusted based on the calculation results.

[0124] Before installing the device, all components need to be inspected and prepared. Check whether the main frame is deformed or damaged, whether the base mounting holes are intact; confirm that the wedge-shaped abutment of the slurry plate is intact, the sealing strip is not damaged, and the corrugation distribution frequency is consistent with the calculated value. Check the locking bolts and compression springs of the locking assembly for proper operation. Check the connections between the shock absorber body, shock-absorbing elastic plate, and connecting arm in the shock-proof structure, and whether the stabilizing springs are sufficiently elastic. Also, conduct a power-on test on the drive motor, adjustment motor, and telescopic cylinder to ensure they are in good working order.

[0125] The installation process begins by securing the base of the device to a stable location at the construction site through the mounting holes. Use expansion bolts or anchor bolts with a tightening torque of 80 to 100 N·m. Ensure the base is level, using a spirit level to check that the deviation should not exceed 2 mm / m. Then, adjust the position of the left and right brackets so that the stop plate is accurately aligned with the concrete formwork joint. Based on the calculated optimal distribution distance D, mark the installation position of the seismic structure along the length of the stop plate and install the seismic structure into the corresponding compression opening.

[0126] Next, connect the electrical control system. Connect the drive motor, regulating motor, and telescopic cylinder to the control panel. Connect the signal lines from the upper and lower force sensors to the signal processing unit. Set the control parameters, including the drive motor speed, the regulating motor's control accuracy, the telescopic cylinder's travel limits, and the force sensor's trigger threshold. Set the system alarm threshold based on the calculated values of the concrete slurry pressure P and the formwork joint tension F, typically 1.2 times the design value.

[0127] After installation is complete, perform a functional test. First, start the drive motor and adjust the angle of the mortar stop plate so that the wedge-shaped contact part is close to the concrete formwork joint, but maintain a gap of 2 to 3 mm to avoid damaging the formwork. Then start the adjustment motor to rotate the adjustment rod to drive the adjustment frame. Observe the swing of the connecting arm and the angle change of the shockproof elastic plate. The deflection angle θ of the shockproof elastic plate should meet the calculated value. where d a is the displacement of the connecting arm endpoint, l a is the length of the connecting arm. Adjust the position of the adjustment frame to make the shock-proof elastic plate in the best working state and stabilize the total elastic force F provided by the spring. s It should be large enough to support the connecting arm, but not so large that it restricts the movement of the connecting arm.

[0128] After the test is completed, it enters the formal use stage. 30 minutes before concrete pouring, start the drive motor to fully expand the slurry stop plate, and the wedge-shaped abutment part is in close contact with the edge of the concrete formwork joint to form a preliminary seal. According to the actual situation of the construction site, fine-tune the angle φ of the wedge-shaped abutment part to make it close to the theoretical optimal value Where μ is the coefficient of friction between the wedge-shaped abutment and the edge of the template joint. Activate the telescopic cylinder to fully close the stop plate, forming an effective stop structure. Check the contact between the sealing strip and the template joint to ensure there is no noticeable gap.

[0129] After concrete pouring begins, closely monitor the working status of the stop plate. Use the force sensor data displayed on the control panel to monitor the force applied to the stop plate in real time. When the concrete slurry rises to the stop plate, observe the stop plate effect. If a small leak is found, fine-tune the telescopic cylinder stroke to increase the stop plate pressure. During concrete vibration, the shockproof structure automatically absorbs and buffers vibration energy, reducing the amplitude of vibration transmitted to the template joints. Based on the shock absorption performance evaluation index Monitoring earthquake protection effect, E d The value should be no less than 0.7, indicating that the device can effectively reduce vibration transmission by more than 70%.

[0130] After the concrete is poured to the designed height, continue to monitor the operating status of the grouting device for at least 30 minutes to ensure that there will be no leakage due to temperature changes or structural adjustments during the initial setting of the concrete. After the concrete reaches the initial setting state (usually 2 to 4 hours after pouring, the specific time depends on the concrete mix ratio and ambient temperature), slowly operate the telescopic cylinder to separate the grouting plate from the formwork joint. Avoid rapid operation during the separation process to prevent damage to the concrete surface that has already set. After complete separation, turn off all motors and cylinders and disconnect the power supply.

[0131] To dismantle the device, first remove the shock-absorbing structure and remove the shock-absorbing body from the compression opening, taking care not to damage the shock-absorbing elastic plate and connecting arm. Next, remove the locking assembly and remove the locking plate from the connection slot. Carefully collect the compression spring and locking bolt. Finally, dismantle the main frame, loosen and remove the expansion bolts connecting the base to the ground, and completely remove the device.

[0132] Post-use cleaning and maintenance are crucial to ensuring the long-term effectiveness of the device. Use a neutral detergent and a soft brush to clean the surface of the mortar plate, especially the wedge-shaped abutment and the sealing strip, to remove any adhering concrete residue. Inspect all components of the seismic isolation structure. Replace any stabilizing springs that are deformed or have lost their elasticity. Lubricate all bearings and rotating parts with lithium-based grease to ensure smooth rotation upon next use. Check the seals on the motor and cylinder. Repair or replace any seals if any oil or air leaks are detected. Finally, store the cleaned device in a dry, well-ventilated area, away from direct sunlight and rain.

[0133] Under different construction conditions, the device parameters need to be adjusted according to the actual situation. For high-grade concrete (such as C50 and above), the slurry pressure and fluidity are relatively large, and the number of seismic structures N needs to be increased or the distribution distance D needs to be reduced to improve the slurry stopping ability. For large-area plain concrete wall construction, multiple devices may be required to work together, and the equipment spacing should be 0.8 to 1.0 times the length of the slurry stopping plate to ensure full coverage of the joints. When constructing in a high-temperature environment (ambient temperature exceeds 30°C), the concrete setting speed is accelerated, and the use time of the device should be shortened accordingly. The initial setting time of the concrete may be only 60% to 70% of that under normal temperature conditions.

[0134] By strictly following the above-described usage process and scientifically adjusting the parameters based on the seismic structural distribution optimization equation and related parameters, the present invention's clear-faced concrete formwork joint grouting device can effectively resolve grout leakage during construction, significantly improving the surface quality and aesthetics of clear-faced concrete, reducing post-repair work, and enhancing project quality and efficiency. The advantages of this device are particularly evident in the construction of high-grade concrete, large clear-faced concrete buildings, and complex structures, meeting the stringent surface quality requirements of modern construction projects.

[0135] It should be noted that the variables involved in the present invention are explained in detail as shown in Table 1 below.

[0136] Table 1 Variable explanation table

[0137] The following is an explanation of all variables, subscripts, and constants involved in the full text:

[0138]

[0139] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A grout-stopping device for the joints of plain concrete formwork, characterized in that: include: The cam is secured to the upper edge of the cam and is secured to the lower edge of the cam, and the cam is secured to the lower edge of the cam.

2. The grout-stopping device for the joints of the plain concrete formwork according to claim 1, characterized in that: The main frame includes a base, on which a left bracket and a right bracket are symmetrically arranged; a left connecting seat is fixed on the left bracket of the main frame, and a right connecting seat is fixed on the right bracket of the main frame, and the stop plate is rotatably mounted on the right connecting seat and the left connecting seat through a connecting shaft; a fixed seat is also fixed on the base, and a drive motor is fixed on the fixed seat, and the power output end of the drive motor is connected to the connecting shaft at the left end of the stop plate through a transmission.

3. The grout-stopping device for the joints of the plain concrete formwork according to claim 2, characterized in that: The right connecting seat includes a right seat body and a reinforcing support rod; the right seat body is fixedly mounted on the right side bracket by at least three circumferentially distributed reinforcing support rods; the connecting shaft at the right end of the stop plate is a hollow shaft, and is rotatably mounted on the right seat body through a bearing; an adjusting motor is fixedly mounted on the right side bracket, and the adjusting motor is located between the reinforcing support rod and the right seat body, and the power output shaft of the adjusting motor passes through the inner hole of the connecting shaft at the right end of the stop plate, and is transmission-connected to the adjusting rod.

4. The grout-stopping device for the joints of the plain concrete formwork according to claim 2 or 3, characterized in that: An upper force sensor and a lower force sensor are fixedly installed on the left bracket through fixing bars respectively, and the upper force sensor and the lower force sensor are located on the upper and lower sides of the left connecting seat and are symmetrically distributed in a circular pattern; a protrusion is fixed on the left end of the stop plate, and the protrusion is located between the upper force sensor and the lower force sensor, and is used to trigger the upper force sensor and the lower force sensor respectively; the upper force sensor and the lower force sensor limit the rotation of the stop plate through the protrusion.

5. The grout-stopping device for the joints of the plain concrete formwork according to claim 1, characterized in that: Wedge-shaped abutting parts are respectively provided on both sides of the slurry-stopping plate, and the wedge-shaped abutting parts abut against the edges of the joints of the concrete formwork to form a sealed slurry-stopping structure; a plurality of sealing strips are provided on the surface of the wedge-shaped abutting parts, and the sealing strips are distributed in a corrugated shape to enhance the slurry-stopping effect.

6. The grout-stopping device for the joints of the plain concrete formwork according to claim 1, characterized in that: The left side bracket and the right side bracket are fixedly connected together through a transverse bracket; the transverse bracket is wrapped around the rear of the stop plate; a reinforcing connecting plate is fixed to the upper end of the transverse bracket at a position corresponding to the connecting groove, and a rotating shaft is fixed to the rear side of the connecting groove, the rotating shaft is hinged to the reinforcing connecting plate, and a telescopic cylinder is fixed to the reinforcing connecting plate, the piston rod of the telescopic cylinder is connected to the rotating shaft, and the telescopic cylinder drives the rotating shaft to rotate to drive the stop plate to open and close.

7. The grout-stopping device for the joints of the plain concrete formwork according to claim 6, characterized in that: A plurality of reinforcing ribs are also provided on the outer wall of the pulp stopping plate.

8. The grout-stopping device for the joints of the plain concrete formwork according to claim 7, characterized in that: An annular groove is provided on the inner side wall of the pulp stopping plate.

9. The grout-stopping device for the joints of the plain concrete formwork according to claim 8, characterized in that: A cross-shaped groove is provided on the inner side wall of the pulp stopping plate.

10. The grout-stopping device for the joints of the plain concrete formwork according to claim 9, characterized in that: The distribution of the seismic structure follows the following equation: D=(L×H×K) / (N×(P+F))×α; wherein D is the optimal distribution distance of the seismic-proof structure, L is the length of the stop-slurry plate, H is the height of the stop-slurry plate, K is the concrete vibration frequency coefficient, N is the number of the seismic-proof structures, P is the concrete slurry pressure, F is the template joint tension, and α is the safety factor; the game equation is used to calculate the optimal distribution distance of the seismic-proof structure in the stop-slurry device, and the input includes the length of the stop-slurry plate, the height of the stop-slurry plate, the concrete vibration frequency coefficient, the number of the seismic-proof structures, the concrete slurry pressure and the template joint tension, and the output is the optimal spacing between the seismic-proof structures, ensuring the best seismic effect while preventing the structures from being overly concentrated or dispersed.

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