Rubber water seal device with connecting comb structure and determination method

Abstract

The invention provides a rubber water seal device with connecting comb structures and a determination method. The connecting comb structures are arranged on connecting surfaces at the two ends of a rubber water seal; the method comprises the following steps of: calculating allowable stress of a connecting comb structure part, correcting, analyzing and comparing a performance safety coefficient K of the connecting comb structure part, and constructing structural elements such as a comb type tooth profile type, a comb type tooth profile number n, a comb type tooth profile width b and the like of the connecting comb structure; the technical parameters of the working surface of the connecting 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 spacing delta and the number Z of the water seal clamping bolts are determined, so that the requirements for rubber water seal enveloping clamping and pre-pressing performance are met. According to the rubber water seal device with the connecting comb structure, the tear resistance of the connecting part of the rubber water seal can be improved and enhanced, and the connecting enclosing and sealing performance of the gate water seal is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of gate reliable sealing enhancement, forming a reinforced staggered connection structure of a rubber water seal extension portion, ensuring the sealing and water retaining function and operational safety of a hydraulic gate under high head conditions, and in particular to a rubber water seal device with a connection comb structure and a determination method. Background Art

[0002] For a long time, the water retaining of hydraulic gates has mainly relied on the connection and enclosure of rubber water seals to achieve sealing operation. The splicing and enclosure of rubber water seals are mainly achieved through direct splicing and bonding. Affected by many factors such as the load-bearing basis of the rubber water seal splicing parts, construction technology, gate operating conditions, etc., the bearing capacity of the spliced ​​and bonded rubber water seal connection surface is relatively weak, and it is difficult to meet the complex fluid-solid coupling load during the opening or closing process of the hydraulic gate. In recent years, with the emergence of a large number of high-head working conditions such as pumped storage projects, the rubber water seal connection surface is subject to the combined effects of high-pressure water loads, motion sliding tearing, transient fluid hydrodynamics, and superelastic properties of rubber water seal materials. It is very easy to cause abnormal bonding and tearing and cracking of rubber water seals during the opening and closing process of hydraulic gates, resulting in the failure of the sealing and water retaining function of the hydraulic gate, and inducing engineering diseases such as 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 rubber water seal device with a connecting comb structure, so as to provide reliable sealing protection for hydraulic steel gates 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 rubber water seal device with a connecting 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] The rubber water seal is located directly below the water seal pressure plate, and is used to provide an elastomer seal. A connecting comb structure is provided at the connecting surface between two adjacent rubber water seals;

[0007] The water seal pad is located directly below the rubber water seal and is used to support and clamp the rubber water seal;

[0008] 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.

[0009] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0010] As a preferred technical solution of the present invention: the structural technical parameters of the connecting comb structure are set according to the following steps:

[0011] (1) Arrange them at the connecting surfaces at both ends of the rubber water seal and stagger them and evenly distribute them along the connecting surfaces;

[0012] (2) constructing structural elements of the rubber water seal connection comb structure, wherein the structural elements include the type of comb tooth profile, the number of comb tooth profiles n, and the width of the comb tooth profile b;

[0013] (3) A plurality of groups of comb-shaped tooth profiles of the same type are connected.

[0014] As a preferred technical solution of the present invention: the rubber water seal connector has a straight, sawtooth, equilateral triangle, rectangle, trapezoid and conjugate arc comb-shaped tooth profile, and its geometric structure includes:

[0015] (1) An oblique straight butt joint section with an angle of 30 to 150° with the axis of the rubber water seal forms an oblique straight staggered joint;

[0016] (2) A sawtooth-shaped staggered joint is formed by a sawtooth-shaped cross section (an oblique saw with a bottom angle of α=30° and β=3°);

[0017] (3) A triangular staggered coupling head is formed by a triangular tooth section (base angle α = 30-70°);

[0018] (4) A rectangular tooth cross section (length-to-width ratio 0.25-0.5) is used to form a rectangular staggered coupling head;

[0019] (5) A trapezoidal tooth cross section (base angle α = 60-80°) is used to form a ladder-shaped staggered joint;

[0020] (6) A circular arc staggered joint is formed by a continuous concave-convex conjugated staggered semicircular tooth section.

[0021] As a preferred technical solution of the present invention, the specific steps of constructing the structural elements of the rubber water seal connecting comb structure are:

[0022] (1) Considering the gate working water head P, the comb profile type and comb profile width b of the connecting comb structure are preliminarily selected according to Table 1, and then the number of comb profiles n is calculated by formula (1);

[0023]

[0024] Wherein, b is the width of the comb-shaped tooth profile of the connecting comb structure, int() is the rounding function, W is the width of the rubber water seal, and n is the number of comb-shaped tooth profiles;

[0025] Table 1 Selection rules for comb tooth profile types of connecting comb structures and recommended range of comb tooth profile width b

[0026] Working head P(m) Comb tooth profile type Recommended range of comb tooth profile width b (mm) ＜30m Oblique straight type 20～100m Sawtooth 15~25mm 20～100m Equilateral triangle 15~25mm 80～200m Rectangular 15~30mm 80～200m Ladder type 20~50mm ＞180m Conjugate arc type 15~30mm

[0027] (2) According to the structure and size specifications of the comb-shaped tooth profile, the equivalent bonding cross-sectional area S of the connecting surface of the connecting comb structure is determined and obtained according to formula (2):

[0028]

[0029] Where S is the equivalent bonding cross-sectional area of ​​the connecting surface of the connecting comb structure, f(x,y) is the contour equation of the connecting surface of the connecting comb structure projected on the xOy plane, and f x (x,y) is the partial derivative of the contour equation with respect to x, f y (x, y) is the partial derivative of the profile equation with respect to y, D is the projection area of ​​the profile equation f(x, y) on the xOy plane, n is the number of comb-shaped tooth profiles, ζ i is the aggregation coefficient of the i-th comb-shaped tooth profile due to the staggered connection and overlap effect. The specific value of the aggregation coefficient should be determined through simulation calculation;

[0030] (3) Obtain the maximum tearing force F that the rubber water seal connecting comb structure can withstand through testing. max , and calculate the allowable stress [σ′] of the rubber water seal connecting comb structure according to formula (3),

[0031]

[0032] Where [σ′] is the allowable stress of the rubber water seal comb structure, F max is the maximum tearing force that the rubber water seal connecting comb structure can withstand, S is the equivalent bonding cross-sectional area of ​​the connecting surface of the connecting comb structure, μ is the area correction coefficient caused by the stress concentration effect caused by the cross-sectional shape of the comb tooth profile, and the specific value of the area correction coefficient should be determined through simulation calculation, and η is the safety factor of the rubber water seal;

[0033] (4) Consider the allowable stress of the rubber water seal [σ * ] and the allowable stress [σ′] of the connecting comb structure, and calculate the safety factor K of the rubber water seal connecting comb structure performance according to formula (4).

[0034]

[0035] Where K is the safety factor of the rubber water seal comb structure performance, [σ * ] is the allowable stress of the rubber water seal, and [σ′] is the allowable stress of the rubber water seal connecting comb structure.

[0036] As a preferred technical solution of the present invention: the process of analyzing and comparing the sealing performance information of the rubber water seal connecting comb structure and the reliable sealing of the hydraulic steel gate water seal includes:

[0037] (1) Compare the calculated safety factor K of the rubber water seal comb structure performance with the allowable index of the gate water seal reliable sealing performance;

[0038] (2) Determine whether the safety factor K of the rubber water seal connection comb structure performance exceeds 0.9;

[0039] (3) Analyze and obtain the performance safety information of the rubber water seal connection comb structure. If the performance safety factor K of the rubber water seal connection comb structure exceeds 0.9, the performance of the enhanced rubber water seal connection of the connection comb structure can meet the requirements of the gate sealing performance. Otherwise, there is a risk of tearing and cracking of the rubber water seal, and the corresponding warning information is generated;

[0040] (4) If the performance safety factor K of the rubber water seal comb connection structure does not exceed 0.9, consider increasing the number of comb tooth profiles n, changing the type of comb tooth profiles, and recalculating to meet the gate working head sealing requirements.

[0041] As a preferred technical solution of the present invention: the specifications and control steps of the connecting comb structure are as follows:

[0042] (1) The size specification of the connecting comb structure is above IT7 level;

[0043] (2) The envelope volume of the water seal cavity section is controlled at a compression rate of -15 to -10%;

[0044] (3) The working surface roughness is controlled above Ra12.6μm;

[0045] (4) Within the ±100mm neighborhood on both sides of the connecting comb structure, the cavity surface adopts the m2~m8 reticulated knurling process to enhance the rubber water seal support and clamping constraint requirements.

[0046] 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:

[0047] (1) Considering the working water pressure P of the hydraulic steel gate, the diameter d of a single water seal clamping bolt and the spacing of the arrangement elements Δ shall be specified according to Table 2. The spacing of the bolts in the connecting comb structure shall be controlled within 50 mm;

[0048] Table 2 Bolt selection rules

[0049]

[0050] Note: The bolt spacing of the connecting comb structure should be controlled within 50mm;

[0051] (2) Considering the sealing length L of the gate rubber water seal, the number of bolts Z is determined according to formula (5).

[0052]

[0053] Where Z is the number of rubber water seal clamping bolts, L is the sealing length of the gate rubber 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 rubber water seal rotation angle factor is 2 to 3;

[0054] (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 (6),

[0055]

[0056] 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;

[0057] (4) If the bolt group cannot meet the conditions after verification according to formula (6), 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.

[0058] Another object of the present invention is to provide a method for determining a rubber water seal device having a connecting comb structure.

[0059] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0060] A method for determining a rubber water seal device having a connecting comb structure comprises the following steps:

[0061] S1. A connecting comb structure is arranged at the connecting heads at both ends of the rubber water seal, and is staggered and evenly distributed along the connecting surface. Multiple groups of comb-shaped tooth profiles of the same comb-shaped tooth profile type are connected to form a connecting comb structure;

[0062] S2. Calculate the allowable stress [σ′] of the connecting comb structure of the connecting heads at both ends of the rubber water seal, calibrate and analyze the safety factor K of the connecting comb structure performance, and construct the structural elements for reliable sealing of the rubber water seal of the hydraulic steel gate. The structural elements include the type of comb tooth profile, the number of comb tooth profiles n, and the width of the comb tooth profile b;

[0063] 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 the technical parameters of the connection comb structure, enhance the protection and clamping constraints of the rubber water seal;

[0064] 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 and water seal gasket for the rubber water seal envelope clamping and pre-tightening performance requirements;

[0065] 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 connection, enclosure and sealing performance of the gate rubber water seal connection.

[0066] The present invention provides a rubber water seal device with a connecting comb structure and a determination method, wherein a connecting comb structure is set at the connecting surface of both ends of the rubber water seal; by calculating the allowable stress [σ′] of the connecting comb structure, and calibrating and analyzing and comparing its performance safety factor K, the comb-shaped tooth profile type, the number of comb-shaped tooth profiles n, the width of the comb-shaped tooth profile b and other structural elements of the connecting comb structure are constructed; by controlling the technical parameters, the control of the technical parameters of the working surface of the connecting comb structure is achieved, 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), the arrangement element spacing Δ, and the number Z are clarified to meet the requirements for the rubber water seal envelope clamping and pre-tightening performance. The rubber water seal device with a connecting comb structure of the present invention can improve and strengthen the tear resistance of the rubber water seal connection part, and ensure the connection enclosure and sealing performance of the gate water seal.

[0067] Compared with the prior art, the present invention has the following significant advantages: the equivalent bonding cross-sectional area S of the rubber water seal connection surface is increased through the connection comb structure, thereby increasing the allowable stress [σ′] at the connection comb structure, improving and strengthening the reliable connection performance of the rubber water seal extension connection part, 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, and having important engineering practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 It is a schematic diagram of the technical structure of the connection comb of the hydraulic gate rubber water seal;

[0069] Figure 2 for Figure 1 Sectional view in the AA direction;

[0070] Figure 3 It is a schematic diagram of the structure of various comb-shaped tooth profile types of hydraulic gate rubber water seal;

[0071] Figure 4 This is a schematic diagram of the extended connection comb structure of the hydraulic gate rubber water seal;

[0072] Figure 5 Schematic diagram of the straight butt bonding cross-sectional area [S] and the equivalent bonding cross-sectional area S;

[0073] Figure 6 It is a schematic diagram of the knurled structure on the surface of the cavity of the protective splint;

[0074] In the figure: 1-connecting comb structure, 2-water seal pressure plate, 3-water seal pad, 4-rubber water seal, 5-water seal clamping bolt, 111-oblique straight comb tooth profile, 112-sawtooth comb tooth profile, 113-equilateral triangle comb tooth profile, 114-rectangular comb tooth profile, 115-trapezoidal comb tooth profile, 116-conjugate arc comb tooth profile. DETAILED DESCRIPTION

[0075] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0076] like Figure 1-4 As shown, a rubber water seal device with a connecting comb structure is composed of a rubber water seal 4 with a connecting comb structure 1 and providing a sealing elastomer function, a water seal pressure plate 2 with a function of clamping the rubber water seal 4, 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 that clamps the water seal pressure plate 2, the rubber water seal 4, and the water seal pad 3 and is installed on the hydraulic steel gate, and control technical parameters of the connecting comb structure.

[0077] First, the structural technical parameters of the connection comb structure are set according to the following steps:

[0078] (1) Arrange them at the connecting surfaces at both ends of the rubber water seal and stagger them and evenly distribute them along the connecting surfaces;

[0079] (2) constructing the structural elements of the rubber water seal connection comb structure, such as the type of comb tooth profile, the number of comb tooth profiles n, and the width of the comb tooth profile b;

[0080] (3) A plurality of groups of comb-shaped tooth profiles of the same type are connected.

[0081] The comb-shaped tooth profile type defines the comb-shaped tooth profile types of the rubber water seal connector, such as oblique straight type, sawtooth type, equilateral triangle type, rectangular type, trapezoidal type and conjugate arc type. Its geometric structure shapes include:

[0082] (1) An oblique straight butt joint section with an angle of 30 to 150° with the axis of the rubber water seal forms an oblique straight staggered joint;

[0083] (2) A sawtooth-shaped staggered joint is formed by a sawtooth-shaped cross section (an oblique saw with a bottom angle of α=30° and β=3°);

[0084] (3) A triangular staggered coupling head is formed by a triangular tooth section (base angle α = 30-70°);

[0085] (4) A rectangular tooth cross section (length-to-width ratio 0.25-0.5) is used to form a rectangular staggered coupling head;

[0086] (5) A trapezoidal tooth cross section (base angle α = 60-80°) is used to form a ladder-shaped staggered joint;

[0087] (6) A circular arc staggered joint is formed by a continuous concave-convex conjugated staggered semicircular tooth section.

[0088] The specific steps of constructing the structural elements such as the comb tooth profile type, the number of comb tooth profiles n, and the width b of the comb tooth profile of the rubber water seal connection comb structure are as follows:

[0089] (1) Considering the gate working water head P, the comb profile type and comb profile width b of the connecting comb structure are preliminarily selected according to Table 1, and then the number of comb profiles n is calculated by formula (1);

[0090]

[0091] Wherein, b is the width of the comb-shaped tooth profile of the connecting comb structure, int() is the rounding function, W is the width of the rubber water seal, and n is the number of comb-shaped tooth profiles;

[0092] Table 1 Selection rules for comb tooth profile types of connecting comb structures and recommended range of comb tooth profile width b

[0093]

[0094]

[0095] like Figure 5 As shown, according to the structure and size specifications of the comb-shaped tooth profile type, the equivalent bonding cross-sectional area S of the connecting surface of the connecting comb structure is determined and obtained according to formula (2):

[0096]

[0097] Where S is the equivalent bonding cross-sectional area of ​​the connecting surface of the connecting comb structure, f(x,y) is the contour equation of the connecting surface of the connecting comb structure projected on the xOy plane, and f x (x,y) is the partial derivative of the contour equation with respect to x, f y (x, y) is the partial derivative of the profile equation with respect to y, D is the projection area of ​​the profile equation f(x, y) on the xOy plane, n is the number of comb-shaped tooth profiles, ζ i is the aggregation coefficient of the i-th comb-shaped tooth profile due to the staggered connection and overlap effect. The specific value of the aggregation coefficient should be determined through simulation calculation;

[0098] (3) Obtain the maximum tearing force F that the rubber water seal connecting comb structure can withstand through testing. max , and calculate the allowable stress [σ′] of the rubber water seal connecting comb structure according to formula (3),

[0099]

[0100] Where [σ′] is the allowable stress of the rubber water seal comb structure, F max is the maximum tearing force that the rubber water seal connecting comb structure can withstand, S is the equivalent bonding cross-sectional area of ​​the connecting surface of the connecting comb structure, μ is the area correction coefficient caused by the stress concentration effect caused by the cross-sectional shape of the comb tooth profile, and the specific value of the area correction coefficient should be determined through simulation calculation, and η is the safety factor of the rubber water seal;

[0101] (4) Consider the allowable stress of the rubber water seal [σ * ] and the allowable stress [σ′] of the connecting comb structure, and calculate the safety factor K of the rubber water seal connecting comb structure performance according to formula (4).

[0102]

[0103] Where K is the safety factor of the rubber water seal comb structure performance, [σ * ] is the allowable stress of the rubber water seal, and [σ′] is the allowable stress of the rubber water seal connecting comb structure.

[0104] The process of analyzing and comparing the sealing performance information of the rubber water seal comb structure and the reliable sealing of the hydraulic steel gate water seal includes:

[0105] (1) Compare the calculated safety factor K of the rubber water seal comb structure performance with the allowable index of the gate water seal reliable sealing performance;

[0106] (2) Determine whether the safety factor K of the rubber water seal connection comb structure performance exceeds 0.9;

[0107] (3) Analyze and obtain the performance safety information of the rubber water seal connection comb structure. If the performance safety factor K of the rubber water seal connection comb structure exceeds 0.9, the performance of the enhanced rubber water seal connection of the connection comb structure can meet the requirements of the gate sealing performance. Otherwise, there is a risk of tearing and cracking of the rubber water seal, and the corresponding warning information is generated;

[0108] (4) If the performance safety factor K of the rubber water seal comb connection structure does not exceed 0.9, consider increasing the number of comb tooth profiles n, changing the type of comb tooth profiles, and recalculating to meet the gate working head sealing requirements.

[0109] Further, such as Figure 6 As shown, by controlling the technical parameters, the technical parameters of the working surface of the connecting comb structure are controlled, and the requirements include:

[0110] (1) The size specification of the connecting comb structure is above IT7 level;

[0111] (2) The envelope volume of the water seal cavity section is controlled at a compression rate of -15 to -10%;

[0112] (3) The working surface roughness is controlled above Ra12.6μm;

[0113] (4) Within the ±100mm neighborhood on both sides of the connecting comb structure, the cavity surface adopts the m2~m8 reticulated knurling process to enhance the rubber water seal support and clamping constraint requirements.

[0114] Furthermore, the specifications and arrangement elements of the water seal clamping bolts are verified according to the following steps:

[0115] (1) Considering the working water pressure P of the hydraulic steel gate, the diameter d of a single water seal clamping bolt and the spacing of the arrangement elements Δ shall be specified according to Table 2. The spacing of the bolts in the connecting comb structure shall be controlled within 50 mm;

[0116] Table 2 Bolt selection rules

[0117]

[0118] Note: The bolt spacing of the connecting comb structure should be controlled within 50mm;

[0119] (2) Considering the sealing length L of the gate rubber water seal, the number of bolts Z is determined according to formula (5).

[0120]

[0121] Where Z is the number of rubber water seal clamping bolts, L is the sealing length of the gate rubber 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 rubber water seal rotation angle factor is 2 to 3;

[0122] (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 (6),

[0123]

[0124] 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;

[0125] (4) If the bolt group cannot meet the conditions after verification according to formula (6), 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.

[0126] The present invention also provides a method for determining a rubber water seal device having a connecting comb structure, comprising the following steps:

[0127] S1. A connecting comb structure is arranged at the connecting heads at both ends of the rubber water seal, and is staggered and evenly distributed along the connecting surface. Multiple groups of comb-shaped tooth profiles of the same comb-shaped tooth profile type are connected to form a connecting comb structure;

[0128] S2. Calculate the allowable stress [σ′] of the connecting comb structure of the connecting heads at both ends of the rubber water seal, calibrate and analyze the safety factor K of the connecting comb structure performance, and construct the structural elements for reliable sealing of the rubber water seal of the hydraulic steel gate. The structural elements include the type of comb tooth profile, the number of comb tooth profiles n, and the width of the comb tooth profile b;

[0129] 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 the technical parameters of the connection comb structure, enhance the protection and clamping constraints of the rubber water seal;

[0130] 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 and water seal gasket for the rubber water seal envelope clamping and pre-tightening performance requirements;

[0131] 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 connection, enclosure and sealing performance of the gate rubber water seal connection.

[0132] 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 rubber water seal device with a connecting 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; The rubber water seal is located directly below the water seal pressure plate, and is used to provide an elastomer seal. A connecting comb structure is provided at the connecting surface between two adjacent rubber water seals; 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 connecting comb structure are set according to the following steps: (1) Arrange them at the connecting surfaces at both ends of the rubber water seal and stagger them and evenly distribute them along the connecting surfaces; (2) constructing structural elements of the rubber water seal connection comb structure, wherein the structural elements include the type of comb tooth profile, the number of comb tooth profiles n, and the width of the comb tooth profile b; (3) A plurality of groups of comb-shaped tooth profiles of the same type are connected.

3. The device according to claim 2, characterized in that: The comb-shaped tooth profile types of rubber water seal joints, including oblique straight, sawtooth, equilateral triangle, rectangle, trapezoid and conjugate arc, are specified, and their geometric shapes include: (1) An oblique straight butt joint section with an angle of 30 to 150° with the axis of the rubber water seal forms an oblique straight staggered joint; (2) A sawtooth-shaped staggered joint is formed by a sawtooth-shaped cross section (an oblique saw with a bottom angle of α=30° and β=3°); (3) A triangular staggered coupling head is formed by a triangular tooth section (base angle α = 30-70°); (4) A rectangular tooth cross section (length-to-width ratio 0.25-0.5) is used to form a rectangular staggered coupling head; (5) A trapezoidal tooth cross section (base angle α = 60-80°) is used to form a ladder-shaped staggered joint; (6) A circular arc staggered joint is formed by a continuous concave-convex conjugated staggered semicircular tooth section.

4. The device according to claim 2, characterized in that: The specific steps of constructing the structural elements of the rubber water seal connection comb structure are: (1) Considering the gate working water head P, the comb profile type and comb profile width b of the connecting comb structure are preliminarily selected according to Table 1, and then the number of comb profiles n is calculated by formula (1); Wherein, b is the width of the comb-shaped tooth profile of the connecting comb structure, int() is the rounding function, W is the width of the rubber water seal, and n is the number of comb-shaped tooth profiles; Table 1 Selection rules for comb tooth profile types of connecting comb structures and recommended range of comb tooth profile width b (2) According to the structure and size specifications of the comb-shaped tooth profile, the equivalent bonding cross-sectional area S of the connecting surface of the connecting comb structure is determined and obtained according to formula (2): Where S is the equivalent bonding cross-sectional area of ​​the connecting surface of the connecting comb structure, f(x,y) is the contour equation of the connecting surface of the connecting comb structure projected on the xOy plane, and f x (x,y) is the partial derivative of the contour equation with respect to x, f y (x, y) is the partial derivative of the profile equation with respect to y, D is the projection area of ​​the profile equation f(x, y) on the xOy plane, n is the number of comb-shaped tooth profiles, ζ i is the aggregation coefficient of the i-th comb-shaped tooth profile due to the staggered connection and overlap effect. The specific value of the aggregation coefficient should be determined through simulation calculation; (3) Obtain the maximum tearing force F that the rubber water seal connecting comb structure can withstand through testing. max , and calculate the allowable stress [σ′] of the rubber water seal connecting comb structure according to formula (3), Where [σ′] is the allowable stress of the rubber water seal comb structure, F max is the maximum tearing force that the rubber water seal connecting comb structure can withstand, S is the equivalent bonding cross-sectional area of ​​the connecting surface of the connecting comb structure, μ is the area correction coefficient caused by the stress concentration effect caused by the cross-sectional shape of the comb tooth profile, and the specific value of the area correction coefficient should be determined through simulation calculation, and η is the safety factor of the rubber water seal; (4) Consider the allowable stress of the rubber water seal [σ * ] and the allowable stress [σ′] of the connecting comb structure, and calculate the safety factor K of the rubber water seal connecting comb structure performance according to formula (4). Where K is the safety factor of the rubber water seal comb structure performance, [σ * ] is the allowable stress of the rubber water seal, and [σ′] is the allowable stress of the rubber water seal connecting comb structure.

5. The device according to claim 4, characterized in that: The process of analyzing and comparing the sealing performance information of the rubber water seal comb structure and the reliable sealing of the hydraulic steel gate water seal includes: (1) Compare the calculated safety factor K of the rubber water seal comb structure performance with the allowable index of the gate water seal reliable sealing performance; (2) Determine whether the safety factor K of the rubber water seal connection comb structure performance exceeds 0.9; (3) Analyze and obtain the performance safety information of the rubber water seal connection comb structure. If the performance safety factor K of the rubber water seal connection comb structure exceeds 0.9, the performance of the enhanced rubber water seal connection of the connection comb structure can meet the requirements of the gate sealing performance. Otherwise, there is a risk of tearing and cracking of the rubber water seal, and the corresponding warning information is generated; (4) If the performance safety factor K of the rubber water seal comb connection structure does not exceed 0.9, consider increasing the number of comb tooth profiles n, changing the type of comb tooth profiles, and recalculating to meet the gate working head sealing requirements.

6. The device according to claim 1, characterized in that: The specifications and control steps of the connection comb structure are as follows: (1) The size specification of the connecting 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 connecting comb structure, 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 the hydraulic steel gate, the diameter d of a single water seal clamping bolt and the spacing of the arrangement elements Δ shall be specified according to Table 2. The spacing of the bolts in the connecting comb structure shall be controlled within 50 mm; Table 2 Bolt selection rules Note: The bolt spacing of the connecting comb structure should be controlled within 50mm; (2) Considering the sealing length L of the gate rubber water seal, the number of bolts Z is determined according to formula (5). Where Z is the number of rubber water seal clamping bolts, L is the sealing length of the gate rubber 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 rubber water seal rotation angle factor 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 (6), 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 (6), 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. A method for determining a rubber water seal device with a connecting comb structure according to claim 1, characterized in that: The method comprises the following steps: S1. A connecting comb structure is arranged at the connecting heads at both ends of the rubber water seal, and is staggered and evenly distributed along the connecting surface. Multiple groups of comb-shaped tooth profiles of the same comb-shaped tooth profile type are connected to form a connecting comb structure; S2. Calculate the allowable stress [σ′] of the connecting comb structure of the connecting heads at both ends of the rubber water seal, calibrate and analyze the safety factor K of the connecting comb structure performance, and construct the structural elements for reliable sealing of the rubber water seal of the hydraulic steel gate. The structural elements include the type of comb tooth profile, the number of comb tooth profiles n, and the width of the comb tooth profile 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 the technical parameters of the connection comb structure, enhance the protection and clamping constraints of the rubber water seal; 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 and water seal gasket 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 connection, enclosure and sealing performance of the gate rubber water seal connection.

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