Water seal pressure plate device with gap comb structure and determination method

Abstract

The application provides a water seal pressing plate device with a joint comb structure and a determination method, which sets a joint comb structure at the joint part of the two ends of the water seal pressing plate; calculates the performance of the joint comb structure in delaying pressure penetration 压力坡降 , analyzes and compares the sealing safety factor K, constructs the structure elements of the joint comb structure, such as the comb tooth type, the number of comb teeth n, and the comb tooth width b; controls the technical parameters to control the technical parameters of the working surface of the joint comb structure, enhances the rubber water seal protection and clamping constraint; calculates the bearing capacity of the water seal clamping bolt, and determines the diameter d specification (grade), arrangement element spacing Δ, and number Z of the water seal clamping bolt to meet the requirements of the water seal pressing plate envelope clamping and pre-pressing performance. The water seal pressing plate device with the joint comb structure can improve and strengthen the joint enclosure and sealing performance of the joint part of the water seal pressing plate.

Description

Technical Field

[0001] This invention relates to the field of gate reliable sealing enhancement technology, forming a staggered joint enclosure and delayed pressure penetration sealing of the water seal pressure plate to ensure the water-blocking function and operational safety of hydraulic gates under high water head conditions, and particularly to a water seal pressure plate device and method for determining a joint comb structure. Background Technology

[0002] Water seal plates have traditionally been used to clamp and protect the rubber water seals of gates, serving as a crucial component for ensuring reliable protection and sealing of the gate's water seal. Due to the large size of the gate structure and assembly limitations, water seal plates cannot be manufactured or assembled as a single unit. They are typically produced in sections with spliced ​​seams, resulting in gaps or breaks at the joints. In recent years, with the increasing prevalence of high-head conditions such as pumped storage projects, and the combined effects of complex fluid-structure interaction loads and the hyperelastic properties of the rubber water seal material, gaps or breaks at the joints of the water seal plates easily cause stress relaxation damage to the rubber material. This leads to widespread and developing engineering defects such as gate seal failure, water-induced vibration, overload of opening and closing forces, operational imbalance, and creep. Summary of the Invention

[0003] The first objective of this invention is to provide a water seal pressure plate device with a spliced ​​comb structure, which is intended to provide reliable sealing protection for hydraulic gates when operating under high water head conditions.

[0004] Therefore, the above-mentioned objective of the present invention is achieved through the following technical solution:

[0005] A water seal pressure plate device with a splicing comb structure includes 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 seam comb structure is installed 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 is used to provide an elastomer seal.

[0008] The water seal pad is located directly below the rubber water seal, and the water seal pad is used to support and hold 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 pad, thereby clamping the rubber water seal with the water seal pressure plate and the water seal pad, and fixing the water seal pressure plate, the rubber water seal, and the water seal pad to 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 embodiment of the present invention, the structural technical parameters of the stitching comb structure are set according to the following steps:

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

[0013] (2) Construct the structural elements of the splice joint at both ends of the water seal pressure plate, the structural elements including: comb tooth type, number of comb teeth n, and comb tooth width b;

[0014] (3) Multiple sets of the same comb tooth type are combined to form a comb.

[0015] As a preferred technical solution of the present invention: the comb tooth type of the water seal pressure plate joint is defined as a straight line, arc, rectangle, trapezoid, sawtooth, or triangle, and its geometric structure includes:

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

[0017] (2) A circular arc staggered joint is formed by continuous concave-convex conjugate intersecting semi-circular splicing sections;

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

[0019] (4) The trapezoidal cross section (base angle α = 60~80°) forms a water seal pressure plate trapezoidal staggered joint;

[0020] (5) A sawtooth-shaped interlocking joint is formed by a sawtooth splice section (a sawtooth with a bottom angle of α = 30° and β = 3°).

[0021] (6) Triangular interlocking joints are formed by triangular splicing sections (base angle α = 30-70°).

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

[0023] (1) Considering the working head P of the gate, the comb tooth type and comb tooth width b of the spliced ​​comb structure are initially selected according to Table 1, and the number of comb teeth n is calculated by formula (1).

[0024]

[0025] In the formula, b is the width of the comb teeth of the stitched comb structure, int() is the floor function, W is the width of the rubber water seal, and n is the number of comb teeth;

[0026] Table 1. Rules for selecting comb tooth types and recommended range for tooth width b in stitched comb structures.

[0027]

[0028]

[0029] (2) According to the structural form and size specification l of the comb tooth type, calculate the pressure permeation attenuation h of a single comb tooth along the straight path and the local abrupt change in the structure of the stitched comb structure according to formula (2). λ | i Calculate the pressure permeation attenuation h at the local abrupt change point of a single seam comb structure in the pressure permeation 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 h represents the pressure permeation attenuation along the i-th tooth of the spliced ​​comb structure in the direction of pressure permeation. ξ | j The pressure permeation attenuation at the local abrupt change in the structure at point j, f(l,1 / b) represents the pressure permeation attenuation characteristic of the straight segment of the comb teeth. The pressure permeation attenuation characteristics of the abrupt change in the comb teeth at the seam are given by: l is the length along the i-th comb tooth, b is the width of the comb tooth at the seam gap or partition, θ is the bending angle of the comb tooth at the seam, and τ is the pressure permeation attenuation coefficient of the local abrupt change in the structure.

[0033] (3) Clarify the hysteresis pressure permeation performance of the seam comb structure. 压力坡降 According to formula (4):

[0034]

[0035] In the formula, Γ 压力坡降 To represent the performance of the stitched comb structure in delaying pressure penetration, n is the number of stitched comb teeth along the pressure penetration direction, m is the number of turns of the stitched comb teeth; the straight segment of the i-th comb tooth of the stitched comb structure and the local structural abrupt change at the j-th point are also mentioned.

[0036] (4) Considering the working head P of the gate and the hysteresis pressure seepage performance of the 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] In the formula, K is the safety factor of the gate water seal 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 splice comb structure with the reliable sealing of the water seal of the hydraulic steel gate 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 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 spliced ​​comb structure can meet the requirements of the gate sealing performance. Otherwise, there is a risk of gate sealing failure, and corresponding early warning information is generated.

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

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

[0045] (1) The dimensions of the stitched comb structure must be IT7 grade or above;

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

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

[0048] (4) Within a ±100mm radius on both sides of the joint, the surface of the cavity is knurled with an area of ​​m2 to m8 to enhance the rubber water seal support and clamping constraint requirements.

[0049] As a preferred embodiment of the present invention, the specification verification and element arrangement steps of the water seal clamping bolt are as follows:

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

[0051] Table 2 Bolt Selection Rules

[0052]

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

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

[0055]

[0056] In the formula, Z represents the number of rubber water seal clamping bolts, L represents the sealing enclosure length of the gate water seal, Δ represents the spacing of the bolt arrangement elements, and int() is the floor function. To account for the gate water seal rotation angle factor, the number of bolt adjustments is taken as 2 to 3;

[0057] (3) Considering the sliding friction resistance f of the hydraulic steel gate r The working water pressure P of the hydraulic steel gate and the load characteristics of the clamping bolts are used to check the load capacity of the bolts according to formula (7), with a 10% margin in load capacity.

[0058]

[0059] In the formula, N ν N is the average shear force borne by a single bolt. t The average tensile force borne by a single bolt, N ν b N represents the design value of the shear capacity of a single bolt. t b f is the design value of the tensile bearing capacity of a single bolt. r Let P be the sliding friction resistance of the hydraulic steel gate during operation, and K be the working water pressure of the hydraulic steel gate. f K is the reliability factor for friction connections, ranging from 1.1 to 1.3. p The tensile and compressive load bearing reliability factor is taken as 1.1 to 1.2, μ is the friction coefficient of the contact surface between the rubber part and the steel material, taken as 0.35 to 0.70, and m is the number of contact surfaces;

[0060] (4) If the bolt group cannot meet the conditions according to formula (7), consider adjusting the diameter d of the water seal clamping bolts, the specification (grade), the spacing Δ of the arrangement elements, etc., and 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 objective of this invention is to provide a method for determining a water-sealed pressure plate device with a seam comb structure.

[0062] Therefore, the above-mentioned objective of the present invention is achieved through the following technical solution:

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

[0064] S1. The seam comb structure is set at the seam joints at both ends of the water seal pressure plate and is staggered and evenly distributed along the cross-section. Multiple sets of comb tooth structures with the same type of comb teeth constitute the seam comb structure.

[0065] S2. Calculate the performance of the joint comb structure at both ends of the water seal pressure plate in delaying pressure permeation. 压力坡降 Furthermore, the sealing safety factor K of the spliced ​​comb structure was calculated, analyzed, and compared to construct the structural elements for reliable sealing of the water seal of the hydraulic steel gate. The structural elements include comb tooth type, comb tooth number n, and comb tooth width b.

[0066] S3. By controlling the size specifications to IT7 or above, controlling the envelope volume to -15 to -10% compression rate, controlling the roughness to Ra12.6μm or above, and using the knurling process on the cavity surface m2 to m8 within a ±100mm adjacent range on both sides of the seam, the technical parameters of the seam comb structure are controlled, which enhances the rubber water seal support and clamping constraint.

[0067] S4. Considering the sliding friction resistance f of the hydraulic steel gate during operation r The working water pressure P of the hydraulic steel gate is verified according to the bearing capacity. The diameter d, specification (grade), spacing Δ, and quantity Z of the water seal clamping bolts are checked to meet the requirements of the gate water seal pressure plate for the enveloping clamping and pre-tightening performance of the rubber water seal.

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

[0069] This invention provides a water seal pressure plate device and method for determining a jointed comb structure, wherein a jointed comb structure is provided at the joints at both ends of the water seal pressure plate; and the pressure permeability hysteresis performance (Γ) of the jointed comb structure is calculated. 压力坡降 The invention involves calculating and analyzing the sealing safety factor K, and constructing structural elements such as the comb tooth type, number of comb teeth n, and comb tooth width b of the spliced ​​comb structure. By controlling technical parameters, the working surface technical parameters of the spliced ​​comb structure are controlled, enhancing the rubber water seal support and clamping constraint. The bearing capacity of the water seal clamping bolts is calculated, and the diameter d (grade), spacing Δ, and quantity Z of the water seal clamping bolts are determined to meet the requirements of the water seal pressure plate's enveloping clamping and pre-tightening performance. The water seal pressure plate device with a spliced ​​comb structure of this invention can improve and strengthen the splicing enclosure and sealing performance of the water seal pressure plate's joint.

[0070] Compared with the prior art, the present invention increases the friction length h along the joint through the water seal pressure plate splice comb structure. λ |i Local h ξ | j The pressure osmosis attenuation rate increases, thereby enhancing the performance of hysteresis pressure osmosis. 压力坡降 This method eliminates the pressure influence of liquid at the joint, overcomes the combined effects of high water head conditions, complex fluid-structure interaction loads, and the hyperelasticity of rubber water seal materials, and ensures reliable sealing of the gate, which has important practical engineering significance. Attached Figure Description

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

[0072] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0073] Figure 3 Schematic diagram of various spliced ​​comb-tooth structures of gate water seal pressure plate;

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

[0075] Figure 5 A schematic diagram showing the length l of the comb teeth along the joint of the gate water seal pressure plate and the local structural abrupt changes.

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

[0077] In the diagram: 1-seam comb structure, 2-water seal pressure plate, 3-water seal pad, 4-rubber water seal, 5-clamping bolt, 11-seam comb tooth structure, 111-slanted straight seam comb tooth structure, 112-arc seam comb tooth structure, 113-rectangular seam comb tooth structure, 114-trapezoidal seam comb tooth structure, 115-serrated seam comb tooth structure, 116-triangular seam comb tooth structure. Detailed Implementation

[0078] The present invention will now be described in detail 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 consists of a water seal pressure plate 2 with a seam comb structure 1 and clamping function, a rubber water seal 4 located directly below the water seal pressure plate 2 to provide a sealing elastomer function, a water seal pad 3 located directly below the rubber water seal 4 to support and clamp the rubber water seal 4, a hydraulic steel gate for installing the rubber water seal 4 to seal the working water pressure, water seal clamping bolts 5 that clamp the water seal pressure plate 2, the rubber water seal 4, and the water seal pad 3 and are installed on the hydraulic steel gate, and the control technical parameters of the seam comb structure 1.

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

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

[0082] (2) Construct the structural elements of the splice joint at both ends of the water seal pressure plate, the structural elements including: comb tooth type, number of comb teeth n, and comb tooth width b;

[0083] (3) Multiple sets of the same comb tooth type are combined to form a comb.

[0084] The types of comb-like structures for water seal pressure plate joints, including oblique straight lines, circular arcs, rectangles, trapezoids, sawtooth shapes, and triangles, are clearly defined, and their geometric shapes include:

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

[0086] (2) A circular arc staggered joint is formed by continuous concave-convex conjugate intersecting semi-circular splicing sections;

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

[0088] (4) The trapezoidal cross section (base angle α = 60~80°) forms a water seal pressure plate trapezoidal staggered joint;

[0089] (5) A sawtooth-shaped interlocking joint is formed by a sawtooth splice section (a sawtooth with a bottom angle of α = 30° and β = 3°).

[0090] (6) Triangular interlocking joints are formed by triangular splicing sections (base angle α = 30-70°).

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

[0092] (1) Considering the working head P of the gate, the comb tooth type and comb tooth width b of the spliced ​​comb structure are initially selected according to Table 1, and the number of comb teeth n is calculated by formula (1).

[0093]

[0094] In the formula, b is the width of the comb teeth of the stitched comb structure, int() is the floor function, W is the width of the rubber water seal, and n is the number of comb teeth;

[0095] Table 1. Rules for selecting comb tooth types and recommended range for tooth width b in stitched comb structures.

[0096] Working head P (m) comb type Recommended range for comb tooth width b (mm) ＜60m diagonal line 40～120m arc 15~30mm 80～200m rectangle 15~30mm 80～200m trapezoid 20~50mm ＞180m serrated 12~20mm ＞180m triangle 12~20mm

[0097] (2) According to the structural form and size specification l of the comb tooth type, the straight path of the spliced ​​comb structure and the local abrupt changes in the structure (such as the structure of the comb tooth type) are analyzed. Figure 5 As shown), the pressure permeation attenuation h of a single comb tooth in the pressure permeation direction is calculated according to formula (2). λ | i Calculate the pressure permeation attenuation h at the local abrupt change point of a single seam comb structure in the pressure permeation 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 h represents the pressure permeation attenuation along the i-th tooth of the spliced ​​comb structure in the direction of pressure permeation. ξ | j The pressure permeation attenuation at the local abrupt change in the structure at point j, f(l,1 / b) represents the pressure permeation attenuation characteristic of the straight segment of the comb teeth. The pressure permeation attenuation characteristics of the abrupt change in the comb teeth at the seam are given by: l is the length along the i-th comb tooth, b is the width of the comb tooth at the seam gap or partition, θ is the bending angle of the comb tooth at the seam, and τ is the pressure permeation attenuation coefficient of the local abrupt change in the structure.

[0101] (3) Clarify the hysteresis pressure permeation performance of the seam comb structure. 压力坡降 According to formula (4):

[0102]

[0103] In the formula, Γ 压力坡降 To represent the performance of the stitched comb structure in delaying pressure penetration, n is the number of stitched comb teeth along the pressure penetration direction, m is the number of turns of the stitched comb teeth; the straight segment of the i-th comb tooth of the stitched comb structure and the local structural abrupt change at the j-th point are also mentioned.

[0104] (4) Considering the working head P of the gate and the hysteresis pressure seepage performance of the 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] In the formula, K is the safety factor of the gate water seal 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 with the reliable sealing information of the water seal of the hydraulic steel gate 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 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 spliced ​​comb structure can meet the requirements of the gate sealing performance. Otherwise, there is a risk of gate sealing failure, and corresponding early warning information is generated.

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

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

[0113] (1) The dimensions of the stitched comb structure must be IT7 grade or above;

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

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

[0116] (4) Within a ±100mm radius on both sides of the joint, the surface of the cavity is knurled with an area of ​​m2 to m8 to enhance the rubber water seal support and clamping constraint requirements.

[0117] The steps for verifying the specifications and arranging the elements of the water seal clamping bolts are as follows:

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

[0119] Table 2 Bolt Selection Rules

[0120]

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

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

[0123]

[0124] In the formula, Z represents the number of rubber water seal clamping bolts, L represents the sealing enclosure length of the gate water seal, Δ represents the spacing of the bolt arrangement elements, and int() is the floor function. To account for the gate water seal rotation angle factor, the number of bolt adjustments is taken as 2 to 3;

[0125] (3) Considering the sliding friction resistance f of the hydraulic steel gate r The working water pressure P of the hydraulic steel gate and the load characteristics of the clamping bolts are used to check the load capacity of the bolts according to formula (7), with a 10% margin in load capacity.

[0126]

[0127] In the formula, N ν N is the average shear force borne by a single bolt. t The average tensile force borne by a single bolt, N ν b N represents the design value of the shear capacity of a single bolt. t b f is the design value of the tensile bearing capacity of a single bolt. r Let P be the sliding friction resistance of the hydraulic steel gate during operation, and K be the working water pressure of the hydraulic steel gate. f K is the reliability factor for friction connections, ranging from 1.1 to 1.3. p The tensile and compressive load bearing reliability factor is taken as 1.1 to 1.2, μ is the friction coefficient of the contact surface between the rubber part and the steel material, taken as 0.35 to 0.70, and m is the number of contact surfaces;

[0128] (4) If the bolt group cannot meet the conditions according to formula (7), consider adjusting the diameter d of the water seal clamping bolts, the specification (grade), the spacing Δ of the arrangement elements, etc., and 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 with a seam comb structure, comprising the following steps:

[0130] S1. The seam comb structure is set at the seam joints at both ends of the water seal pressure plate and is staggered and evenly distributed along the cross-section. Multiple sets of comb tooth structures with the same type of comb teeth constitute the seam comb structure.

[0131] S2. Calculate the performance of the joint comb structure at both ends of the water seal pressure plate in delaying pressure permeation. 压力坡降 Furthermore, the sealing safety factor K of the spliced ​​comb structure was calculated, analyzed, and compared to construct the structural elements for reliable sealing of the water seal of the hydraulic steel gate. The structural elements include comb tooth type, comb tooth number n, and comb tooth width b.

[0132] S3. By controlling the size specifications to IT7 or above, controlling the envelope volume to -15 to -10% compression rate, controlling the roughness to Ra12.6μm or above, and using the knurling process on the cavity surface m2 to m8 within a ±100mm adjacent range on both sides of the seam, the technical parameters of the seam comb structure are controlled, which enhances the rubber water seal support and clamping constraint.

[0133] S4. Considering the sliding friction resistance f of the hydraulic steel gate during operation r The working water pressure P of the hydraulic steel gate is verified according to the bearing capacity. The diameter d, specification (grade), spacing Δ, and quantity Z of the water seal clamping bolts are checked to meet the requirements of the gate water seal pressure plate for the enveloping clamping and pre-tightening performance of the rubber water seal.

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

[0135] The above specific embodiments are used to explain and illustrate the present invention, and are only preferred embodiments of the present invention, not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made to the present invention within the spirit and scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A water-sealed pressure plate device with a stitched comb structure, characterized in that: This includes water seal pressure plate, rubber water seal, water seal pad, water seal clamping bolt, and hydraulic steel gate; A joint comb structure is installed at the joint between two adjacent water seal pressure plates; The rubber water seal is located directly below the water seal pressure plate and is used to provide an elastomer seal. The water seal pad is located directly below the rubber water seal, and the water seal pad is used to support and hold the rubber water seal. The water seal clamping bolt passes through the water seal pressure plate, the rubber water seal, and the water seal pad, thereby achieving the clamping of the rubber water seal by the water seal pressure plate and the water seal pad, and fixing the water seal pressure plate, the rubber water seal, and the water seal pad to the hydraulic steel gate. The structural technical parameters of the stitching comb structure are set according to the following steps: (1) Arranged at the joints at both ends of the water seal pressure plate, and staggered and evenly distributed along the transverse cross surface; (2) Construct the structural elements of the splice joint at both ends of the water seal pressure plate, the structural elements including: comb tooth type, number of comb teeth n, and comb tooth width b; (3) Composed of multiple sets of the same comb tooth type; The types of comb teeth for water seal pressure plate joints, including straight lines, arcs, rectangles, trapezoids, sawtooth shapes, and triangles, are clearly defined, and their geometric shapes include: (1) An oblique straight joint section with an angle of 30 to 150° to the axis of the water seal pressure plate forms an oblique straight joint; (2) A circular arc staggered joint is formed by continuous concave-convex conjugate intersecting semi-circular splicing sections; (3) A rectangular interlocking joint is formed by a rectangular splice section with a length-to-width ratio of 0.25 to 0.5; (4) The trapezoidal joint section with a base angle α = 60-80° forms a water seal pressure plate trapezoidal staggered joint; (5) A sawtooth-shaped interlocking joint is formed by a sawtooth splice section with a bottom angle of α = 30° and β = 3°. (6) Triangular interlocking joints are formed by triangular splicing sections with base angles α = 30 to 70°. The specific steps for constructing the structural elements of the joint at both ends of the water seal pressure plate are as follows: (1) Considering the working head P of the gate, the comb tooth type and comb tooth width b of the spliced ​​comb structure are initially selected according to Table 1, and the number of comb teeth n is calculated by formula (1). In the formula, b is the width of the comb teeth of the stitched comb structure, int() is the floor function, W is the width of the rubber water seal, and n is the number of comb teeth; Table 1. Rules for selecting comb tooth types and recommended range for tooth width b in stitched comb structures. (2) According to the structural form and size specification l of the comb tooth type, calculate the pressure permeation attenuation h of a single comb tooth along the straight path and the local abrupt change in the structure of the stitched comb structure according to formula (2). λ | i Calculate the pressure permeation attenuation h at the local abrupt change point of a single seam comb structure in the pressure permeation direction according to formula (3). ξ | j , h λ | i =f(l,1 / b )| i (2) In the formula, h λ | i h represents the pressure permeation attenuation along the i-th tooth of the spliced ​​comb structure in the direction of pressure permeation. ξ | j The pressure permeation attenuation at the local abrupt change in the structure at point j, f(l,1 / b) represents the pressure permeation attenuation characteristic of the straight segment of the comb teeth. The pressure permeation attenuation characteristics of the abrupt change in the comb teeth at the seam are given by: l is the length along the i-th comb tooth, b is the width of the comb tooth at the seam gap or partition, θ is the bending angle of the comb tooth at the seam, and τ is the pressure permeation attenuation coefficient of the local abrupt change in the structure. (3) Clarify the hysteresis pressure permeation performance of the seam comb structure. 压力坡降 According to formula (4): In the formula, Γ 压力坡降 To represent the performance of the stitched comb structure in delaying pressure penetration, n is the number of stitched comb teeth along the pressure penetration direction, m is the number of turns of the stitched comb teeth; the straight segment of the i-th comb tooth of the stitched comb structure and the local structural abrupt change at the j-th point are also mentioned. (4) Considering the working head P of the gate and the hysteresis pressure seepage performance of the comb structure Γ 压力坡降 The safety factor K of the gate water seal sealing performance is calculated according to formula (5); In the formula, K is the safety factor for the gate water seal performance, and P is the gate sealing water pressure.

2. The apparatus according to claim 1, characterized in that: The process of analyzing and comparing the sealing performance information of the water seal pressure plate joint comb structure with the reliable sealing information of the water seal of the hydraulic steel gate 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 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 spliced ​​comb structure can meet the requirements of the gate sealing performance. Otherwise, there is a risk of gate sealing failure, and corresponding early warning information is generated. (4) If the safety factor K of the gate water seal sealing performance exceeds 0.7, consider increasing the number of comb teeth n and changing the comb tooth type to recalculate in order to meet the sealing requirements of the gate working head P.

3. The apparatus according to claim 1, characterized in that: The specifications and control steps of the stitching comb structure are as follows: (1) The dimensions of the stitched comb structure must be IT7 grade or higher; (2) The envelope volume of the water-sealed cavity section is controlled at -15 to -10% compression ratio; (3) The surface roughness of the working surface is controlled above Ra12.6μm; (4) Within a ±100mm radius on both sides of the joint, the surface of the cavity is knurled with an area of ​​m2 to m8 to enhance the rubber water seal support and clamping constraint requirements.

4. The apparatus according to claim 1, characterized in that: The specifications verification and element arrangement steps for the water seal clamping bolts are as follows: (1) Considering the working water pressure P of the hydraulic steel gate, specify the diameter d of the single water seal clamping bolt and the spacing Δ of the arrangement elements according to Table 2. The bolt spacing of the splice comb structure should be controlled within 50mm. Table 2 Bolt Selection Rules Note: The bolt spacing in the seam comb structure should be controlled within 50mm; (2) Considering the sealing length L of the gate water seal, determine the number of bolts Z according to formula (6). In the formula, Z represents the number of rubber water seal clamping bolts, L represents the sealing enclosure length of the gate water seal, Δ represents the spacing of the bolt arrangement elements, and int() is the floor function. To account for the gate water seal rotation angle factor, the number of bolt adjustments is taken as 2 to 3; (3) Considering the sliding friction resistance f of the hydraulic steel gate r The working water pressure P of the hydraulic steel gate is used to check the bearing capacity of the bolts according to formula (7). In the formula, N ν N is the average shear force borne by a single bolt. t The average tensile force borne by a single bolt, N ν b N represents the design value of the shear capacity of a single bolt. t b f is the design value of the tensile bearing capacity of a single bolt. r Let P be the sliding friction resistance of the hydraulic steel gate during operation, and K be the working water pressure of the hydraulic steel gate. f K is the reliability factor for friction connections, ranging from 1.1 to 1.

3. p The tensile and compressive load bearing reliability factor is taken as 1.1 to 1.2, μ is the friction coefficient of the contact surface between the rubber part and the steel material, taken as 0.35 to 0.70, and m is the number of contact surfaces; (4) If the bolt group cannot meet the conditions according to formula (7), consider adjusting the diameter d of the water seal clamping bolt and the spacing Δ of the arrangement elements and 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.

5. The method for determining a water seal pressure plate device with a splicing comb structure according to claim 1, characterized in that: The method includes the following steps: S1. The seam comb structure is set at the seam joints at both ends of the water seal pressure plate and is staggered and evenly distributed along the cross-section. Multiple sets of comb tooth structures with the same type of comb teeth constitute the seam comb structure. S2. Calculate the performance of the joint comb structure at both ends of the water seal pressure plate in delaying pressure permeation. 压力坡降 Furthermore, the sealing safety factor K of the spliced ​​comb structure was calculated, analyzed, and compared to construct the structural elements for reliable sealing of the water seal of the hydraulic steel gate. The structural elements include comb tooth type, comb tooth number n, and comb tooth width b. S3. By controlling the size specifications to IT7 or above, controlling the envelope volume to -15 to -10% compression rate, controlling the roughness to Ra12.6μm or above, and using the knurling process on the cavity surface m2 to m8 within a ±100mm adjacent range on both sides of the seam, the technical parameters of the seam comb structure are controlled, which enhances the rubber water seal support and clamping constraint. S4. Considering the sliding friction resistance f of the hydraulic steel gate during operation r The working water pressure P of the hydraulic steel gate is verified according to the bearing capacity. The diameter d, spacing Δ, and quantity Z of the water seal clamping bolts are checked to meet the requirements of the gate water seal pressure plate for the enveloping clamping and pre-tightening performance of the rubber water seal. S5. The water seal clamping bolts clamp the water seal pressure plate, rubber water seal, and water seal pad together and install them on the hydraulic steel gate to improve and strengthen the splicing and sealing performance of the water seal pressure plate joint.

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