A marine steering gear hydraulic valve assembly with a sealing structure and a sealing method

Abstract

The application discloses a marine rudder engine hydraulic valve group with a sealing structure, which comprises a valve block and a plurality of valve bodies installed on the valve block, a valve core is installed in the valve body, the valve block is provided with a countersunk through hole, the countersunk through hole is provided with a first internal thread, the countersunk through hole is provided with a filling type sealing groove, a sealing connecting piece is connected between the valve block and the valve body, and the sealing connecting piece is installed on the countersunk through hole; a sealing method of the marine rudder engine hydraulic valve group with the sealing structure, which comprises the following using steps: S1, cleaning, S2, installing the sealing connecting piece, S3, installing the valve body, and S4, detecting; the cooperation of the filling type sealing groove and the filling type sealing ring can guarantee the sealing effect in an interference manner, and normal installation can be guaranteed, and the problem that the sealing ring is difficult to install due to the blockage of the sealing ring does not exist.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic valve assembly technology, specifically relating to a marine steering gear hydraulic valve assembly with a sealing structure and a sealing method. Background Technology

[0002] Marine steering gears are currently mostly electro-hydraulic, meaning the hydraulic equipment is remotely controlled by electric equipment. There are two types: one is the reciprocating piston steering gear, which works by switching between high and low pressure oil to generate linear motion, and then converts it into rotary motion via the rudder handle. The other is the vane steering gear, which works by directly applying high and low pressure oil to the rotor; it is small and efficient, but more expensive.

[0003] A hydraulic valve is an automated component operated by pressurized oil. It is controlled by the pressurized oil in a regulating valve and is typically used in combination with a solenoid regulating valve. It can be used for remote control of the on / off states of oil, gas, and water pipelines in hydropower stations. It is commonly used in clamping, control, and lubrication circuits. There are direct-acting and pilot-operated types, with pilot-operated types being more common. A hydraulic valve assembly is a combination of hydraulic valves, typically two or three valves combined together.

[0004] Integrated valve groups use connection holes to connect the hydraulic oil passages of the valve block and the valve body. However, current connection holes are usually used with connectors, and the sealing structure of the connector is only a sealing ring. The installation of the sealing ring is prone to misalignment, which makes installation troublesome. Moreover, misalignment will lead to poor sealing effect and easy leakage of the connection hole. Summary of the Invention

[0005] In view of the problems mentioned in the background art above, the purpose of this invention is to provide a marine steering gear hydraulic valve assembly with a sealing structure and a sealing method.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A marine steering gear hydraulic valve group with a sealing structure includes a valve block and a plurality of valve bodies mounted on the valve block. A valve core is installed in the valve body. The valve block is provided with a countersunk through hole. The countersunk through hole is provided with a first internal thread and a filling sealing groove. A sealing connector is connected between the valve block and the valve body. The sealing connector is installed in the countersunk through hole.

[0008] The sealing connector includes a threaded cylinder, which is threadedly connected to the first internal thread. A filler ring is connected to the lower end of the threaded cylinder, and the filler ring has deformation capability. An internal hexagonal nut is integrally connected to the upper end of the threaded cylinder.

[0009] The upper end of the threaded cylinder is provided with a second internal thread, and the second internal thread is threadedly connected to a straight cylinder. The straight cylinder is provided with an external thread that is threadedly connected to the second internal thread. The upper end of the straight cylinder is provided with a triangular plastic retaining ring. Three first sealing rings are installed on the side of the upper end of the straight cylinder. The upper end of the straight cylinder is provided with an internal hexagon countersunk hole.

[0010] When the external thread and the second internal thread are fully threadedly matched, the lower end of the straight cylinder is located below the filling rubber ring. When the external thread and the second internal thread are fully threadedly matched, the upper end of the straight cylinder is located inside the valve body. When the external thread and the second internal thread are fully threadedly matched, the lower end of the straight cylinder does not protrude from the countersunk through hole.

[0011] A sealing method for a marine steering gear hydraulic valve assembly with a sealing structure includes the following steps:

[0012] S1. Cleaning:

[0013] Clean the inner and outer contact surfaces of the countersunk hole, the first internal thread, the filling seal groove, the filling rubber ring, the second internal thread, and the external thread;

[0014] S2. Install sealing connectors:

[0015] Install the threaded cylinder in the countersunk through hole, and then install the straight cylinder in the threaded cylinder;

[0016] S3. Install the valve body:

[0017] The valve body is pressed directly onto the upper end of the straight cylinder with brute force;

[0018] S4. Detection:

[0019] The airtightness tester was used for testing.

[0020] Furthermore, the filling rubber ring is placed in the filling sealing groove in an interference fit, a design that ensures a sealing effect.

[0021] Furthermore, a second sealing ring is installed on the outside of the countersunk through hole of the valve block, which enhances the sealing performance.

[0022] Furthermore, the single-sided cross-section of the filling sealing groove is a right-angled trapezoid, which facilitates the entry of the filling rubber ring into the filling sealing groove.

[0023] Furthermore, in step S, a high-pressure air gun must be used for blowing cleaning at a minimum, and if liquid is used for cleaning, the liquid must be dry when used. This design ensures the cleaning effect while preventing the liquid from affecting the seal.

[0024] Further specifying that in step S, the threaded cylinder is in a threaded tightened state, and the straight cylinder is screwed in such a way that the external thread is just completely submerged in the second internal thread. This design ensures that the filling rubber ring can correctly enter the filling sealing groove, and the tightening of the thread reduces the gap, which can enhance the sealing effect.

[0025] Further specifying that in step S, after the valve body is pressed, there is a noticeable obstruction when it is shaken left and right, the best condition is that it cannot be shaken left and right. The adjustment method is to continue to rotate the straight cylinder downwards. This design ensures a firm installation effect, reduces the size of the gap, and enhances the sealing effect.

[0026] The beneficial effects of using the present invention are as follows:

[0027] The filling sealing groove and filling sealing ring designed in this invention can ensure the sealing effect in an interference fit, and can also ensure normal installation without the problem of installation difficulties caused by the sealing ring. Attached Figure Description

[0028] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0029] Figure 1 This is a schematic diagram of an embodiment of a marine steering gear hydraulic valve group with a sealing structure according to the present invention;

[0030] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of a marine steering gear hydraulic valve group with a sealing structure according to the present invention;

[0031] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0032] Figure 4 This is a schematic flowchart illustrating an embodiment of a sealing method for a marine steering gear hydraulic valve group with a sealing structure according to the present invention.

[0033] The symbols for the main components are explained below:

[0034] 1. Valve block; 2. Valve body; 3. Valve core; 4. Countersunk through hole; 5. First internal thread; 6. Filler seal groove; 7. Sealing connector; 8. Second sealing ring;

[0035] 71. Threaded cylinder; 72. Filler ring; 73. Socket head cap nut; 74. Second internal thread; 75. Straight cylinder; 76. External thread; 77. Triangular plastic retaining ring; 78. First sealing ring; 79. Socket head countersunk hole. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] like Figures 1-4 As shown, a marine steering gear hydraulic valve group with a sealing structure according to the present invention includes a valve block 1 and a plurality of valve bodies 2 installed on the valve block 1. A valve core 3 is installed in the valve body 2. The valve block 1 is provided with a countersunk through hole 4. The countersunk through hole 4 is provided with a first internal thread 5. The countersunk through hole 4 is provided with a filling sealing groove 6. A sealing connector 7 is connected between the valve block 1 and the valve body 2. The sealing connector 7 is installed in the countersunk through hole 4.

[0038] The sealing connector 7 includes a threaded cylinder 71, which is threadedly connected to the first internal thread 5. A filler ring 72 is connected to the lower end of the threaded cylinder 71. The filler ring 72 has deformation capability. An internal hexagonal nut 73 is integrally connected to the upper end of the threaded cylinder 71.

[0039] The upper end of the threaded cylinder 71 is provided with a second internal thread 74, the second internal thread 74 is threadedly connected to a straight cylinder 75, the straight cylinder 75 is provided with an external thread 76 that is threadedly connected to the second internal thread 74, the upper end of the straight cylinder 75 is provided with a triangular plastic retaining ring 77, three first sealing rings 78 are installed on the side of the upper end of the straight cylinder 75, and the upper end of the straight cylinder 75 is provided with an internal hexagon countersunk hole 79.

[0040] When the external thread 76 and the second internal thread 74 are fully threadedly matched, the lower end of the straight cylinder 75 is located below the filling rubber ring 72. When the external thread 76 and the second internal thread 74 are fully threadedly matched, the upper end of the straight cylinder 75 is located inside the valve body 2. When the external thread 76 and the second internal thread 74 are fully threadedly matched, the lower end of the straight cylinder 75 does not protrude from the countersunk through hole 4.

[0041] A sealing method for a marine steering gear hydraulic valve assembly with a sealing structure includes the following steps:

[0042] S1. Cleaning:

[0043] Clean the inner and outer contact surfaces of countersunk through hole 4, first internal thread 5, filling seal groove 6, filling rubber ring 72, second internal thread 74 and external thread 76;

[0044] S2. Install sealing connectors:

[0045] Install the threaded cylinder 71 into the countersunk through hole 4, and then install the straight cylinder 75 into the threaded cylinder 71;

[0046] S3. Install the valve body:

[0047] The valve body 2 is pressed directly onto the upper end of the straight cylinder 75 with brute force;

[0048] S4. Detection:

[0049] The airtightness tester was used for testing.

[0050] In this implementation case, when using a marine steering gear hydraulic valve group with a sealing structure and a sealing method, the inner and outer contact surfaces of the countersunk through hole 4, the first internal thread 5, the filling sealing groove 6, the filling rubber ring 72, the second internal thread 74 and the external thread 76 are cleaned to ensure that no impurities affect the installation of the sealing connection 7 and the valve body 1.

[0051] Using an Allen wrench, insert the Allen nut 73 and rotate the threaded cylinder 71. With the cooperation of the first internal thread 5, the threaded cylinder 71 and the Allen nut 73 are completely screwed into the countersunk hole 4. The countersunk hole 4 is designed so that the Allen nut 73 will not protrude from the surface of the valve block 1 and thus interfere with the installation of the valve body 2. During the screwing of the threaded cylinder 71, the filling rubber ring 72 will retract inward, so it will not affect the rotation of the threaded cylinder 71.

[0052] Using an Allen wrench inserted into the Allen countersunk hole 79, the straight cylinder 75 is rotated. With the engagement of the external thread 76 and the second internal thread 74, the straight cylinder 75 moves toward the lower end of the threaded cylinder 71. During the movement, the end of the straight cylinder 75 will push the filling rubber ring 72 to deform, thereby causing the filling rubber ring 72 to enter the filling sealing groove 6, thus achieving the purpose of sealing. When the external thread 76 is fully screwed in, stop rotating the straight cylinder 75.

[0053] The valve body 2 is installed on the upper end of the straight cylinder 75 by pressing. Under the deformation action of the triangular plastic retaining ring 77, after the valve body 2 is installed, it will require more brute force to disassemble. Therefore, as long as the force of the deformation of the triangular plastic retaining ring 77 is greater than the hydraulic pressure of the hydraulic valve group, the valve body 2 will not detach from the valve block 1, thus ensuring the installation strength. Under the effect of the three sets of first sealing rings 78, the sealing performance between the valve body 2 and the sealing connection 7 is also guaranteed.

[0054] After installation, the airtightness is tested before proceeding to the next step.

[0055] Preferably, the filler ring 72 is placed in the filler sealing groove 6 with an interference fit. This design ensures the sealing effect. In fact, the specifications and dimensions of the filler ring 72 can also be considered according to the specific situation.

[0056] The preferred valve block 1 has a second sealing ring 8 installed on the outside of the countersunk through hole 4. This design enhances the sealing performance. In fact, the position and number of the second sealing ring 8 can also be considered according to the specific situation.

[0057] The preferred design is that the single-sided cross-section of the filling sealing groove 6 is a right-angled trapezoid. This design facilitates the entry of the filling rubber ring 72 into the filling sealing groove 6. In fact, the cross-sectional shape of the filling sealing groove 6 can also be considered according to specific circumstances.

[0058] In the preferred step S1, at a minimum, a high-pressure air gun must be used for blowing cleaning. If liquid is used for cleaning, it must be in a dry state when used. This design ensures the cleaning effect while preventing the liquid from affecting the seal. In fact, cleaning measures can also be considered according to specific circumstances.

[0059] In the preferred step S2, the threaded cylinder 71 is in the threaded tightened state, and the screw-in position of the straight cylinder 75 is such that the external thread 76 is just completely submerged in the second internal thread 74. This design ensures that the filling rubber ring 72 can correctly enter the filling sealing groove 6, and the tightening of the thread reduces the gap, which can enhance the sealing effect. In fact, the thread length of the threaded cylinder 71 can also be considered according to the specific situation.

[0060] In the preferred step S3, after the valve body 2 is pressed, there is a noticeable obstruction when it is shaken left and right. Ideally, it should not be able to shake left and right. The adjustment method is to continue to rotate the straight cylinder 75 downwards. This design ensures a firm installation effect, reduces the size of the gap, and enhances the sealing effect. In fact, the installation strength requirements of the valve body 2 can also be considered according to the specific situation.

[0061] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A marine rudder engine hydraulic valve group with a sealed structure, comprising a valve block (1) and a plurality of valve bodies (2) mounted on the valve block (1), a valve core (3) being mounted in the valve body (2), characterized in that: The valve block (1) is provided with a countersunk through hole (4), the countersunk through hole (4) is provided with a first internal thread (5), the countersunk through hole (4) is provided with a filling type sealing groove (6), a sealing connecting piece (7) is connected between the valve block (1) and the valve body (2), and the sealing connecting piece (7) is installed in the countersunk through hole (4); The sealing connecting piece (7) comprises a threaded cylinder (71), the threaded cylinder (71) is screwed with the first internal thread (5), a filling rubber ring (72) is connected to the lower end of the threaded cylinder (71), the filling rubber ring (72) has a deformation ability, and an internal hexagonal nut (73) is integrally connected to the upper end of the threaded cylinder (71); The upper end of the threaded cylinder (71) is provided with a second internal thread (74), the second internal thread (74) is screwed with a straight cylinder (75), the straight cylinder (75) is provided with an external thread (76) screwed with the second internal thread (74), the upper end of the straight cylinder (75) is provided with a triangular shaped clamping ring (77), and the upper end of the straight cylinder (75) is provided with three first sealing rings (78) installed on the side surface. When the external thread (76) is completely screwed with the second internal thread (74), the lower end of the straight cylinder (75) is located below the filling rubber ring (72), when the external thread (76) is completely screwed with the second internal thread (74), the upper end of the straight cylinder (75) is located in the interior of the valve body (2), and when the external thread (76) is completely screwed with the second internal thread (74), the lower end of the straight cylinder (75) does not protrude from the countersunk through hole (4).

2. The hydraulic valve block with a sealed structure for a marine steering gear according to claim 1, characterized in that: The filling rubber ring (72) is placed in the filling type sealing groove (6) in an interference manner.

3. The hydraulic valve block with a sealed structure for a marine steering gear according to claim 1, characterized in that: The valve block (1) is provided with a second sealing ring (8) installed on the outside of the countersunk through hole (4).

4. The hydraulic valve block with a sealed structure for a marine steering gear according to claim 1, wherein: The single side section of the filling type sealing groove (6) is a right trapezoid.

5. A sealing method of a marine rudder hydraulic valve group having a sealing structure, comprising the marine rudder hydraulic valve group having a sealing structure according to any one of claims 1 to 4, characterized in that, The use steps comprise the following steps: S1, cleaning: The inner and outer contact surfaces of the countersunk through hole (4), the first internal thread (5), the filling type sealing groove (6), the filling rubber ring (72), the second internal thread (74) and the external thread (76) are cleaned; S2, installing a sealing connecting piece: The threaded cylinder (71) is installed in the countersunk through hole (4), and then the straight cylinder (75) is installed in the threaded cylinder (71); S3, installing a valve body: The valve body (2) is directly pressed on the upper end of the straight cylinder (75) in a brute force pressing manner; S4, detection: A gas tightness detector is used for detection.

6. The sealing method of the hydraulic valve group of the marine rudder engine with a sealing structure according to claim 5, characterized in that: In step S1, a high pressure air gun is used for blowing cleaning at least, and liquid cleaning is ensured to be in a dry state.

7. The sealing method of the hydraulic valve group of the marine rudder engine with a sealing structure according to claim 5, characterized in that: In step S2, the threaded cylinder (71) is in a screwed state, and the straight cylinder (75) is screwed to a position where the external thread (76) is completely immersed in the second internal thread (74).

8. The sealing method of the hydraulic valve group of the marine rudder engine with a sealing structure according to claim 5, characterized in that: In step S3, the valve body (2) is obviously blocked when it is shaken left and right after pressing, and the optimal adjustment mode is that the straight cylinder (75) is continuously rotated downward.

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