Water seal pressing plate device with abutted seam comb structure and determination method

Abstract

The invention provides a water seal pressing plate device with abutted seam comb structures and a determination method. The abutted seam comb structures are arranged at abutted seam joints at the two ends of a water seal pressing plate; the method comprises the following steps of: calculating the performance Gamma-shaped pressure gradient of the hysteresis pressure permeation of the abutted seam comb structure, and correcting, analyzing and comparing the sealing safety coefficient K of the abutted seam comb structure, so as to construct the comb tooth type, the comb tooth number n, the comb tooth width b and other structural elements of the abutted seam comb structure; the technical parameters of the working surface of the abutted seam comb structure are controlled by controlling the technical parameters, and the rubber water seal protection support and the clamping constraint are enhanced; by correcting and calculating the bearing capacity of the water seal clamping bolts, the specification (grade) of the diameter d of the water seal clamping bolts, the arrangement element distance delta and the number Z of the water seal clamping bolts are determined, so that the requirements for enveloping clamping and pre-pressing performance of the water seal pressing plate are met. According to the water seal pressing plate device with the abutted seam comb structure, the splicing enclosing and sealing performance of the abutted seam part of the water seal pressing plate can be improved and enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of gate reliable sealing enhancement, forming staggered seam enclosure and hysteresis pressure penetration seal of water seal pressure plates, ensuring the sealing and water retaining function and operation safety of hydraulic gates under high head conditions, and in particular to a water seal pressure plate device with a seam comb structure and a determination method. Background Art

[0002] Water seal pressure plates have always been mainly used to clamp and support the rubber water seal of the gate. They are key components to ensure reliable support and enclosure sealing of the gate water seal. Due to the large size of the gate structure and limited assembly, the water seal pressure plate cannot be manufactured and assembled as a whole. Water seal pressure plates generally adopt block-by-block joints to clamp and support the rubber water seal, resulting in common gaps or partitions in the joints of the water seal pressure plates. In recent years, with the emergence of a large number of high-head working conditions such as pumped-storage projects, as well as the combined effects of complex fluid-solid coupling loads and the superelastic properties of rubber water seal materials, gaps or partitions in the joints of the water seal pressure plates can easily cause stress relaxation damage to the rubber material, resulting in the common occurrence and development of engineering diseases such as gate seal failure, gate water-induced vibration, overload of opening and closing force, unbalanced operation, and creeping. Summary of the invention

[0003] The first object of the present invention is to provide a water seal pressure plate device with a splicing comb structure, so as to provide reliable sealing protection for the hydraulic gate when operating under high head conditions.

[0004] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0005] A water seal pressure plate device with a seam comb structure, comprising a water seal pressure plate, a rubber water seal, a water seal pad, a water seal clamping bolt and a hydraulic steel gate;

[0006] A joint comb structure is provided at the joint between two adjacent water seal pressure plates;

[0007] The rubber water seal is located directly below the water seal pressure plate, and the rubber water seal is used to provide an elastomer seal;

[0008] The water seal pad is located directly below the rubber water seal and is used to support and clamp the rubber water seal;

[0009] The water seal clamping bolt passes through the water seal pressure plate, the rubber water seal and the water seal gasket, so as to clamp the rubber water seal with the water seal pressure plate and the water seal gasket, and fix the water seal pressure plate, the rubber water seal and the water seal gasket on the hydraulic steel gate.

[0010] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0011] As a preferred technical solution of the present invention: the structural technical parameters of the stitching comb structure are set according to the following steps:

[0012] (1) Arrange at the joints at both ends of the water seal pressure plate, and staggered and evenly distributed along the cross-load surface;

[0013] (2) constructing structural elements of the joints at both ends of the water seal pressure plate, wherein the structural elements include: comb tooth type, comb tooth number n, and comb tooth width b;

[0014] (3) Multiple groups of the same comb teeth type are combined together.

[0015] As a preferred technical solution of the present invention: the comb tooth types of the water seal pressure plate joint joint are clarified to be oblique straight line, circular arc, rectangular, trapezoidal, sawtooth, and triangular, and the geometric structure shapes thereof include:

[0016] (1) An oblique straight line joint section with an angle of 30 to 150° with the axis of the water seal pressure plate forms an oblique straight line joint;

[0017] (2) A circular arc staggered seam joint is formed by continuous concave and convex conjugated staggered semicircular seam sections;

[0018] (3) A rectangular staggered joint is formed by a rectangular joint section (length-to-width ratio 0.25-0.5);

[0019] (4) A trapezoidal staggered joint of the water seal plate is formed by a trapezoidal joint section (bottom angle α = 60-80°);

[0020] (5) A zigzag staggered joint is formed by a saw-shaped joint section (an oblique saw-shaped joint with a bottom angle α=30° and β=3°);

[0021] (6) A triangular staggered seam joint is formed by a triangular seam section (base angle α = 30 to 70°).

[0022] As a preferred technical solution of the present invention, the specific steps of constructing the structural elements of the seam joints at both ends of the water seal pressure plate are:

[0023] (1) Considering the gate working water head P, the comb type and comb width b of the joint comb structure are preliminarily selected according to Table 1, and then the number of comb teeth n is calculated by formula (1);

[0024]

[0025] Wherein, b is the comb teeth width of the joint comb structure, int() is the rounding function, W is the width of the rubber water seal, and n is the number of comb teeth;

[0026] Table 1 Selection rules for comb type of joint comb structure and recommended range of comb width b

[0027]

[0028]

[0029] (2) According to the structure and size of the comb teeth, the pressure penetration attenuation h of a single comb tooth along the straight line and the local mutation position of the joint comb structure is calculated according to formula (2): λ | i , calculate the pressure penetration attenuation h at the local mutation position of a single joint comb structure in the pressure penetration direction according to formula (3): ξ | j ,

[0030] h λ | i =f(l,1 / b )| i (2)

[0031]

[0032] In the formula, h λ | i is the pressure permeability attenuation along the i-th comb tooth of the joint comb structure in the pressure permeability direction, h ξ | j The pressure permeability attenuation at the local mutation site of the j-th point structure, f(l,1 / b) is the pressure permeability attenuation characteristic of the straight line segment of the joint comb teeth, is the pressure permeability attenuation characteristic of the sudden change of the comb teeth, l is the length of the i-th comb tooth, b is the comb width of the gap or partition, θ is the bending angle of the comb teeth, and τ is the pressure permeability attenuation coefficient of the local sudden change of the structure;

[0033] (3) Clarify the hysteresis pressure penetration performance Γ of the patchwork comb structure 压力坡降 , according to formula (4):

[0034]

[0035] In the formula, Γ 压力坡降 is the performance of the patchwork comb structure in delaying pressure penetration, n is the number of patchwork comb teeth along the pressure penetration direction, m is the number of patchwork comb teeth turning points; the jth point along the i-th comb tooth straight line segment of the patchwork comb structure is the local mutation site of the structure;

[0036] (4) Considering the gate working head P and the performance of the hysteresis pressure penetration of the joint comb structure Γ 压力坡降 , the safety factor K of the gate water seal sealing performance is calculated according to formula (5);

[0037]

[0038] Where K is the safety factor of the gate water seal sealing performance, and P is the gate sealing water pressure.

[0039] As a preferred technical solution of the present invention: the process of analyzing and comparing the sealing performance information of the water seal pressure plate joint comb structure and the reliable sealing of the hydraulic steel gate water seal includes:

[0040] (1) Compare the calculated safety factor K of the gate water seal sealing performance with the allowable index of the gate water seal reliable sealing performance;

[0041] (2) Determine whether the safety factor K of the gate water seal sealing performance exceeds 0.7;

[0042] (3) Analyze and obtain the safety information of the gate water seal sealing performance. If the safety factor K of the gate water seal sealing performance does not exceed 0.7, the water seal sealing performance of the joint comb structure can meet the requirements of the gate sealing performance. Otherwise, there is a risk of gate sealing failure, and the corresponding warning information is generated;

[0043] (4) If the safety factor K of the gate water seal performance exceeds 0.7, consider increasing the number of comb teeth n, changing the type of comb teeth, and recalculating to meet the gate working head P operating sealing requirements.

[0044] As a preferred technical solution of the present invention: the specifications and control steps of the stitching comb structure are as follows:

[0045] (1) The size specification of the joint comb structure is above IT7 level;

[0046] (2) The envelope volume of the water seal cavity section is controlled at a compression rate of -15 to -10%;

[0047] (3) The working surface roughness is controlled above Ra12.6μm;

[0048] (4) Within the ±100mm neighborhood on both sides of the joint, the cavity surface adopts the m2~m8 reticulated knurling process to enhance the rubber water seal support and clamping constraint requirements.

[0049] As a preferred technical solution of the present invention: the specification verification and element arrangement steps of the water seal clamping bolts are as follows:

[0050] (1) Considering the working water pressure P of hydraulic steel gate, the diameter d of single water seal clamping bolts (grade) and the spacing of arrangement elements Δ shall be specified according to Table 2. The spacing of bolts in the joint comb structure shall be controlled within 50 mm;

[0051] Table 2 Bolt selection rules

[0052]

[0053] Note: The bolt spacing in the joint comb structure should be controlled within 50mm;

[0054] (2) Considering the gate water seal enclosure length L, the number of bolts Z is determined according to formula (6).

[0055]

[0056] Where Z is the number of rubber water seal clamping bolts, L is the sealing enclosed length of the gate water seal, Δ is the spacing between bolt arrangement elements, int() is the rounding function, The number of bolt adjustments to take into account the gate water seal rotation angle is 2 to 3;

[0057] (3) Consider the sliding friction f of hydraulic steel gate during operation r , the working water pressure P of the hydraulic steel gate and the load characteristics of the clamping bolts, with a 10% margin of the load capacity, the bolts are checked for load capacity according to formula (7).

[0058]

[0059] Where N ν is the average shear force borne by a single bolt, N t is the average tensile force borne by a single bolt, N ν b is the design value of the shear bearing capacity of a single bolt, N t b is the design value of the tensile bearing capacity of a single bolt, f r is the sliding friction resistance of hydraulic steel gate, P is the working water pressure of hydraulic steel gate, K f K is the friction connection reliability factor, which is 1.1 to 1.3. p is the tensile and compressive bearing reliability factor, which is 1.1-1.2, μ is the friction coefficient between the rubber part and the steel material contact surface, which is 0.35-0.70, and m is the number of contact surfaces;

[0060] (4) If the bolt group cannot meet the conditions after verification according to formula (7), consider adjusting the specifications (grade) of the water seal clamping bolt diameter d, the spacing of the layout elements Δ and other measures to recalculate to meet the requirements of the gate water seal pressure plate for the enveloping clamping and pre-tightening performance of the rubber water seal.

[0061] Another object of the present invention is to provide a method for determining a water seal pressure plate device having a seam comb structure.

[0062] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0063] A method for determining a water seal pressure plate device having a seam comb structure comprises the following steps:

[0064] S1. The seam comb structure is arranged at the seam joints at both ends of the water seal pressure plate, and is staggered and evenly distributed along the cross-carrying surface, and multiple groups of comb tooth structures with the same comb tooth type constitute the seam comb structure;

[0065] S2. Calculate the performance of the seam comb structure hysteresis pressure penetration of the joints at both ends of the water seal pressure plate. 压力坡降 , and the sealing safety factor K of the joint comb structure is calibrated and analyzed and compared, and the structural elements of reliable sealing of the hydraulic steel gate water seal are constructed. The structural elements include comb tooth type, comb tooth number n, and comb tooth width b;

[0066] S3, through the size specification control IT7 level or above, envelope volume control -15 ~ -10% compression rate, roughness control Ra12.6μm or above, on both sides of the joint part of the cavity surface within the range of ± 100mm neighborhood m2 ~ m8 reticulated knurling process to achieve the control of joint comb structure technical parameters, enhance the rubber water seal support, clamping constraint;

[0067] S4. Consider the sliding friction f of hydraulic steel gate operation r , hydraulic steel gate working water pressure P, check the water seal clamping bolt diameter d specification (grade), arrangement element spacing Δ, quantity Z according to the bearing capacity, to meet the gate water seal pressure plate for the rubber water seal envelope clamping and pre-tightening performance requirements;

[0068] S5. The water seal clamping bolts clamp the water seal pressure plate, rubber water seal and water seal gasket, and install them on the hydraulic steel gate to improve and strengthen the splicing, enclosure and sealing performance of the joints of the gate water seal pressure plate.

[0069] The present invention provides a water seal pressure plate device with a seam comb structure and a determination method thereof. The seam comb structure is arranged at the seam joints at both ends of the water seal pressure plate; the performance of the seam comb structure in delaying pressure penetration is calculated. 压力坡降 , and calibrate and analyze the sealing safety factor K, and construct the structural elements of the joint comb structure such as the comb type, number of comb teeth n, and comb tooth width b; by controlling the technical parameters, the control of the technical parameters of the working surface of the joint comb structure is realized, and the rubber water seal support and clamping constraints are enhanced; by calibrating the bearing capacity of the water seal clamping bolt, the water seal clamping bolt diameter d specification (grade), arrangement element spacing Δ, and number Z are clarified to meet the requirements of the water seal pressure plate enveloping clamping and pre-tightening performance. The water seal pressure plate device with a joint comb structure of the present invention can improve and strengthen the splicing enclosure and sealing performance of the joint part of the water seal pressure plate.

[0070] Compared with the prior art, the present invention increases the length of the water seal plate by using the seam comb structure. λ |i 、local h ξ | j The pressure penetration attenuation is increased, thereby increasing the performance of hysteresis pressure penetration. 压力坡降 , eliminating the pressure influence of liquid in the joints, overcoming the combined effects of high head conditions, complex fluid-solid coupling loads and superelastic properties of rubber water seal materials, ensuring reliable sealing of the gate, which has important engineering practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 It is a structural schematic diagram of a water seal pressure plate device with a seam comb structure;

[0072] Figure 2 for Figure 1 Sectional view in the AA direction;

[0073] Figure 3 This is a schematic diagram of the various joint comb teeth structure of the gate water seal pressure plate;

[0074] Figure 4 Schematic diagram of various comb structures of gate water seal pressure plate;

[0075] Figure 5 It is a schematic diagram of the comb teeth length l along the path and the local mutation of the structure of the gate water seal pressure plate joint comb structure;

[0076] Figure 6 It is a schematic diagram of the knurled structure on the surface of the water seal pressure plate enveloping the cavity;

[0077] In the figure: 1-joint comb structure, 2-water seal pressure plate, 3-water seal pad, 4-rubber water seal, 5-clamping bolt, 11-joint comb tooth structure, 111-oblique straight joint comb tooth structure, 112-arc joint comb tooth structure, 113-rectangular joint comb tooth structure, 114-trapezoidal joint comb tooth structure, 115-zigzag joint comb tooth structure, 116-triangular joint comb tooth structure. DETAILED DESCRIPTION

[0078] The present invention is described in detail below with reference to specific embodiments.

[0079] like Figure 1-4 As shown, a water seal pressure plate device with a seam comb structure is provided, the device comprises a water seal pressure plate 2 with a seam comb structure 1 and a clamping function, a rubber water seal 4 located directly below the water seal pressure plate 2 and providing a sealing elastomer function, a water seal pad 3 located directly below the rubber water seal 4 and supporting and clamping the rubber water seal 4, a hydraulic steel gate for installing the rubber water seal 4 to seal the working water pressure, a water seal clamping bolt 5 installed on the hydraulic steel gate for clamping the water seal pressure plate 2, the rubber water seal 4 and the water seal pad 3, and control technical parameters of the seam comb structure 1.

[0080] First, the structural technical parameters of the patchwork comb structure are set according to the following steps:

[0081] (1) Arrange at the joints at both ends of the water seal pressure plate, and staggered and evenly distributed along the cross-load surface;

[0082] (2) constructing structural elements of the joints at both ends of the water seal pressure plate, wherein the structural elements include: comb tooth type, comb tooth number n, and comb tooth width b;

[0083] (3) Multiple groups of the same comb teeth type are combined together.

[0084] The comb-tooth structure types of the water seal pressure plate joints, such as oblique straight lines, arcs, rectangles, trapezoids, sawtooth shapes, triangles, etc., are specified. The geometric shapes include:

[0085] (1) An oblique straight line joint section with an angle of 30 to 150° with the axis of the water seal pressure plate forms an oblique straight line joint;

[0086] (2) A circular arc staggered seam joint is formed by continuous concave and convex conjugated staggered semicircular seam sections;

[0087] (3) A rectangular staggered joint is formed by a rectangular joint section (length-to-width ratio 0.25-0.5);

[0088] (4) A trapezoidal staggered joint of the water seal plate is formed by a trapezoidal joint section (bottom angle α = 60-80°);

[0089] (5) A zigzag staggered joint is formed by a saw-shaped joint section (an oblique saw-shaped joint with a bottom angle α=30° and β=3°);

[0090] (6) A triangular staggered seam joint is formed by a triangular seam section (base angle α = 30 to 70°).

[0091] The specific steps for constructing the structural elements such as the tooth type, number of teeth n, and width of teeth b of the water seal plate joint comb structure are as follows:

[0092] (1) Considering the gate working water head P, the comb type and comb width b of the joint comb structure are preliminarily selected according to Table 1, and then the number of comb teeth n is calculated by formula (1);

[0093]

[0094] Wherein, b is the comb teeth width of the joint comb structure, int() is the rounding function, W is the width of the rubber water seal, and n is the number of comb teeth;

[0095] Table 1 Selection rules for comb type of joint comb structure and recommended range of comb width b

[0096] Working head P(m) Comb type Recommended range of comb width b (mm) ＜60m Oblique straight line 40～120m Arc 15~30mm 80～200m rectangle 15~30mm 80～200m Trapezoid 20~50mm ＞180m Zigzag 12~20mm ＞180m triangle 12~20mm

[0097] (2) According to the structure and size of the comb teeth, the straight line of the joint comb structure and the local mutation parts of the structure (such as the structure Figure 5 As shown in the figure, the pressure penetration attenuation h of a single joint comb tooth along the pressure penetration direction is calculated according to formula (2): λ | i , calculate the pressure penetration attenuation h at the local mutation position of a single joint comb structure in the pressure penetration direction according to formula (3): ξ | j ,

[0098] h λ | i =f(l,1 / b )| i (2)

[0099]

[0100] In the formula, h λ | i is the pressure permeability attenuation along the i-th comb tooth of the joint comb structure in the pressure permeability direction, h ξ | j The pressure permeability attenuation at the local mutation site of the j-th point structure, f(l,1 / b) is the pressure permeability attenuation characteristic of the straight line segment of the joint comb teeth, is the pressure permeability attenuation characteristic of the sudden change of the comb teeth, l is the length of the i-th comb tooth, b is the comb width of the gap or partition, θ is the bending angle of the comb teeth, and τ is the pressure permeability attenuation coefficient of the local sudden change of the structure;

[0101] (3) Clarify the hysteresis pressure penetration performance Γ of the patchwork comb structure 压力坡降 , according to formula (4):

[0102]

[0103] In the formula, Γ 压力坡降 is the performance of the patchwork comb structure in delaying pressure penetration, n is the number of patchwork comb teeth along the pressure penetration direction, m is the number of patchwork comb teeth turning points; the jth point along the i-th comb tooth straight line segment of the patchwork comb structure is the local mutation site of the structure;

[0104] (4) Considering the gate working head P and the performance of the hysteresis pressure penetration of the joint comb structure Γ 压力坡降 , the safety factor K of the gate water seal sealing performance is calculated according to formula (5);

[0105]

[0106] Where K is the safety factor of the gate water seal sealing performance, and P is the gate sealing water pressure.

[0107] The process of analyzing and comparing the sealing performance information of the water seal pressure plate joint comb structure and the reliable sealing of the hydraulic steel gate water seal includes:

[0108] (1) Compare the calculated safety factor K of the gate water seal sealing performance with the allowable index of the gate water seal reliable sealing performance;

[0109] (2) Determine whether the safety factor K of the gate water seal sealing performance exceeds 0.7;

[0110] (3) Analyze and obtain the safety information of the gate water seal sealing performance. If the safety factor K of the gate water seal sealing performance does not exceed 0.7, the water seal sealing performance of the joint comb structure can meet the requirements of the gate sealing performance. Otherwise, there is a risk of gate sealing failure, and the corresponding warning information is generated;

[0111] (4) If the safety factor K of the gate water seal performance exceeds 0.7, consider increasing the number of comb teeth n, changing the type of comb teeth, and recalculating to meet the gate working head P operating sealing requirements.

[0112] like Figure 6 As shown, the control of the technical parameters of the working surface of the seam comb structure, the specifications and control steps of the seam comb structure are as follows:

[0113] (1) The size specification of the joint comb structure is above IT7 level;

[0114] (2) The envelope volume of the water seal cavity section is controlled at a compression rate of -15 to -10%;

[0115] (3) The working surface roughness is controlled above Ra12.6μm;

[0116] (4) Within the ±100mm neighborhood on both sides of the joint, the cavity surface adopts the m2~m8 reticulated knurling process to enhance the rubber water seal support and clamping constraint requirements.

[0117] The steps for specification verification and element arrangement of water seal clamping bolts are as follows:

[0118] (1) Considering the working water pressure P of hydraulic steel gate, the diameter d of single water seal clamping bolts (grade) and the spacing of arrangement elements Δ shall be specified according to Table 2. The spacing of bolts in the joint comb structure shall be controlled within 50 mm;

[0119] Table 2 Bolt selection rules

[0120]

[0121] Note: The bolt spacing in the joint comb structure should be controlled within 50mm;

[0122] (2) Considering the gate water seal enclosure length L, the number of bolts Z is determined according to formula (6).

[0123]

[0124] Where Z is the number of rubber water seal clamping bolts, L is the sealing enclosed length of the gate water seal, Δ is the spacing between bolt arrangement elements, int() is the rounding function, The number of bolt adjustments to take into account the gate water seal rotation angle is 2 to 3;

[0125] (3) Consider the sliding friction f of hydraulic steel gate during operation r , the working water pressure P of the hydraulic steel gate and the load characteristics of the clamping bolts, with a 10% margin of the load capacity, the bolts are checked for load capacity according to formula (7).

[0126]

[0127] Where N ν is the average shear force borne by a single bolt, N t is the average tensile force borne by a single bolt, N ν b is the design value of the shear bearing capacity of a single bolt, N t b is the design value of the tensile bearing capacity of a single bolt, f r is the sliding friction resistance of hydraulic steel gate, P is the working water pressure of hydraulic steel gate, K f K is the friction connection reliability factor, which is 1.1 to 1.3. p is the tensile and compressive bearing reliability factor, which is 1.1-1.2, μ is the friction coefficient between the rubber part and the steel material contact surface, which is 0.35-0.70, and m is the number of contact surfaces;

[0128] (4) If the bolt group cannot meet the conditions after verification according to formula (7), consider adjusting the specifications (grade) of the water seal clamping bolt diameter d, the spacing of the layout elements Δ and other measures to recalculate to meet the requirements of the gate water seal pressure plate for the enveloping clamping and pre-tightening performance of the rubber water seal.

[0129] The present invention also provides a method for determining a water seal pressure plate device having a seam comb structure, comprising the following steps:

[0130] S1. The seam comb structure is arranged at the seam joints at both ends of the water seal pressure plate, and is staggered and evenly distributed along the cross-carrying surface, and multiple groups of comb tooth structures with the same comb tooth type constitute the seam comb structure;

[0131] S2. Calculate the performance of the seam comb structure hysteresis pressure penetration of the joints at both ends of the water seal pressure plate. 压力坡降 , and the sealing safety factor K of the joint comb structure is calibrated and analyzed and compared, and the structural elements of reliable sealing of the hydraulic steel gate water seal are constructed. The structural elements include comb tooth type, comb tooth number n, and comb tooth width b;

[0132] S3, through the size specification control IT7 level or above, envelope volume control -15 ~ -10% compression rate, roughness control Ra12.6μm or above, on both sides of the joint part of the cavity surface within the range of ± 100mm neighborhood m2 ~ m8 reticulated knurling process to achieve the control of joint comb structure technical parameters, enhance the rubber water seal support, clamping constraint;

[0133] S4. Consider the sliding friction f of hydraulic steel gate operation r , hydraulic steel gate working water pressure P, check the water seal clamping bolt diameter d specification (grade), arrangement element spacing Δ, quantity Z according to the bearing capacity, to meet the gate water seal pressure plate for the rubber water seal envelope clamping and pre-tightening performance requirements;

[0134] S5. The water seal clamping bolts clamp the water seal pressure plate, rubber water seal and water seal gasket, and install them on the hydraulic steel gate to improve and strengthen the splicing, enclosure and sealing performance of the joints of the gate water seal pressure plate.

[0135] The above-mentioned specific implementation methods are used to explain the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A water seal pressure plate device with a seam comb structure, characterized in that: It includes a water seal pressure plate, a rubber water seal, a water seal pad, a water seal clamping bolt and a hydraulic steel gate; A joint comb structure is provided at the joint between two adjacent water seal pressure plates; The rubber water seal is located directly below the water seal pressure plate, and the rubber water seal is used to provide an elastomer seal; The water seal pad is located directly below the rubber water seal and is used to support and clamp the rubber water seal; The water seal clamping bolt passes through the water seal pressure plate, the rubber water seal and the water seal gasket, so as to clamp the rubber water seal with the water seal pressure plate and the water seal gasket, and fix the water seal pressure plate, the rubber water seal and the water seal gasket on the hydraulic steel gate.

2. The device according to claim 1, characterized in that: The structural technical parameters of the stitching comb structure are set according to the following steps: (1) Arrange at the joints at both ends of the water seal pressure plate, and staggered and evenly distributed along the cross-load surface; (2) constructing structural elements of the joints at both ends of the water seal pressure plate, wherein the structural elements include: comb tooth type, comb tooth number n, and comb tooth width b; (3) Multiple groups of the same comb teeth type are combined together.

3. The device according to claim 2, characterized in that: The comb tooth types of the water seal pressure plate joints are clarified, including oblique straight lines, arcs, rectangles, trapezoids, sawtooth shapes, and triangles. The geometric shapes include: (1) An oblique straight line joint section with an angle of 30 to 150° with the axis of the water seal pressure plate forms an oblique straight line joint; (2) A circular arc staggered seam joint is formed by continuous concave and convex conjugated staggered semicircular seam sections; (3) A rectangular staggered joint is formed by a rectangular joint section (length-to-width ratio 0.25-0.5); (4) A trapezoidal staggered joint of the water seal plate is formed by a trapezoidal joint section (bottom angle α = 60-80°); (5) A zigzag staggered joint is formed by a saw-shaped joint section (an oblique saw-shaped joint with a bottom angle α=30° and β=3°); (6) A triangular staggered seam joint is formed by a triangular seam section (base angle α = 30 to 70°).

4. The device according to claim 2, characterized in that: The specific steps for constructing the structural elements of the joints at both ends of the water seal pressure plate are: (1) Considering the gate working water head P, the comb type and comb width b of the joint comb structure are preliminarily selected according to Table 1, and then the number of comb teeth n is calculated by formula (1); Wherein, b is the comb teeth width of the joint comb structure, int() is the rounding function, W is the width of the rubber water seal, and n is the number of comb teeth; Table 1 Selection rules for comb type of joint comb structure and recommended range of comb width b (2) According to the structure and size of the comb teeth, the pressure penetration attenuation h of a single comb tooth along the straight line and the local mutation position of the joint comb structure is calculated according to formula (2): λ | i , calculate the pressure penetration attenuation h at the local mutation position of a single joint comb structure in the pressure penetration direction according to formula (3): ξ | j , h λ | i =f(l,1 / b)| i (2) In the formula, h λ | i is the pressure permeability attenuation along the i-th comb tooth of the comb tooth structure along the pressure permeability direction, h ξ | j The pressure permeability attenuation at the local mutation site of the j-th point structure, f(l,1 / b) is the pressure permeability attenuation characteristic of the straight line segment of the joint comb teeth, is the pressure permeability attenuation characteristic of the sudden change of the comb teeth, l is the length of the i-th comb tooth, b is the comb width of the gap or partition, θ is the bending angle of the comb teeth, and τ is the pressure permeability attenuation coefficient of the local sudden change of the structure; (3) Clarify the hysteresis pressure penetration performance Γ of the patchwork comb structure 压力坡降 , according to formula (4): In the formula, Γ 压力坡降 is the performance of the patchwork comb structure in delaying pressure penetration, n is the number of patchwork comb teeth along the pressure penetration direction, m is the number of patchwork comb teeth turning points; the jth point along the i-th comb tooth straight line segment of the patchwork comb structure is the local mutation site of the structure; (4) Considering the gate working head P and the performance of the hysteresis pressure penetration of the joint comb structure Γ 压力坡降 , the safety factor K of the gate water seal sealing performance is calculated according to formula (5); Where K is the safety factor of the gate water seal sealing performance, and P is the gate sealing water pressure.

5. The device according to claim 4, characterized in that: The process of analyzing and comparing the sealing performance information of the water seal pressure plate joint comb structure and the reliable sealing of the hydraulic steel gate water seal includes: (1) Compare the calculated safety factor K of the gate water seal sealing performance with the allowable index of the gate water seal reliable sealing performance; (2) Determine whether the safety factor K of the gate water seal sealing performance exceeds 0.7; (3) Analyze and obtain the safety information of the gate water seal sealing performance. If the safety factor K of the gate water seal sealing performance does not exceed 0.7, the water seal sealing performance of the joint comb structure can meet the requirements of the gate sealing performance. Otherwise, there is a risk of gate sealing failure, and the corresponding warning information is generated; (4) If the safety factor K of the gate water seal performance exceeds 0.7, consider increasing the number of comb teeth n, changing the type of comb teeth, and recalculating to meet the gate working head P operating sealing requirements.

6. The device according to claim 1, characterized in that: The specifications and control steps of the stitching comb structure are as follows: (1) The size specification of the joint comb structure is above IT7 level; (2) The envelope volume of the water seal cavity section is controlled at a compression rate of -15 to -10%; (3) The working surface roughness is controlled above Ra12.6μm; (4) Within the ±100mm neighborhood on both sides of the joint, the cavity surface adopts the m2~m8 reticulated knurling process to enhance the rubber water seal support and clamping constraint requirements.

7. The device according to claim 1, characterized in that: The steps for specification verification and element arrangement of the water seal clamping bolts are as follows: (1) Considering the working water pressure P of hydraulic steel gate, the diameter d of single water seal clamping bolts (grade) and the spacing of arrangement elements Δ shall be specified according to Table 2. The spacing of bolts in the joint comb structure shall be controlled within 50 mm; Table 2 Bolt selection rules Note: The bolt spacing in the joint comb structure should be controlled within 50mm; (2) Considering the gate water seal enclosure length L, the number of bolts Z is determined according to formula (6). Where Z is the number of rubber water seal clamping bolts, L is the sealing enclosed length of the gate water seal, Δ is the spacing between bolt arrangement elements, int() is the rounding function, The number of bolt adjustments to take into account the gate water seal rotation angle is 2 to 3; (3) Consider the sliding friction f of hydraulic steel gate during operation r , hydraulic steel gate working water pressure P, check the bearing capacity of the bolts according to formula (7), Where N ν is the average shear force borne by a single bolt, N t is the average tensile force borne by a single bolt, N ν b is the design value of the shear bearing capacity of a single bolt, N t b is the design value of the tensile bearing capacity of a single bolt, f r is the sliding friction resistance of hydraulic steel gate, P is the working water pressure of hydraulic steel gate, K f K is the friction connection reliability factor, which is 1.1 to 1.

3. p is the tensile and compressive bearing reliability factor, which is 1.1-1.2, μ is the friction coefficient between the rubber part and the steel material contact surface, which is 0.35-0.70, and m is the number of contact surfaces; (4) If the bolt group cannot meet the conditions after verification according to formula (7), consider adjusting the specifications (grade) of the water seal clamping bolt diameter d, the spacing of the layout elements Δ and other measures to recalculate to meet the requirements of the gate water seal pressure plate for the enveloping clamping and pre-tightening performance of the rubber water seal.

8. The method for determining a water seal pressure plate device with a seam comb structure according to claim 1, characterized in that: The method comprises the following steps: S1. The seam comb structure is arranged at the seam joints at both ends of the water seal pressure plate, and is staggered and evenly distributed along the cross-carrying surface, and multiple groups of comb tooth structures with the same comb tooth type constitute the seam comb structure; S2. Calculate the performance of the seam comb structure hysteresis pressure penetration of the joints at both ends of the water seal pressure plate. 压力坡降 , and the sealing safety factor K of the joint comb structure is calibrated and analyzed and compared, and the structural elements of reliable sealing of the hydraulic steel gate water seal are constructed. The structural elements include comb tooth type, comb tooth number n, and comb tooth width b; S3, through the size specification control IT7 level or above, envelope volume control -15 ~ -10% compression rate, roughness control Ra12.6μm or above, on both sides of the joint part of the cavity surface within the range of ± 100mm neighborhood m2 ~ m8 reticulated knurling process to achieve the control of joint comb structure technical parameters, enhance the rubber water seal support, clamping constraint; S4. Consider the sliding friction f of hydraulic steel gate operation r , hydraulic steel gate working water pressure P, check the water seal clamping bolt diameter d specification (grade), arrangement element spacing Δ, quantity Z according to the bearing capacity, to meet the gate water seal pressure plate for the rubber water seal envelope clamping and pre-tightening performance requirements; S5. The water seal clamping bolts clamp the water seal pressure plate, rubber water seal and water seal gasket, and install them on the hydraulic steel gate to improve and strengthen the splicing, enclosure and sealing performance of the joints of the gate water seal pressure plate.

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