An adjustable stuffing box for marine vessels and method of use

Abstract

The application discloses a marine adjustable packing gland and a using method thereof. The packing gland comprises a packing gland body, a hollow supporting ring, a telescopic rubber body, a telescopic spring, an adjustable bolt and a ring-shaped clasp. The telescopic rubber body is arranged in the packing gland body. The hollow supporting ring is connected between the packing gland body and the telescopic rubber body. The ring-shaped clasp is arranged on the inner side wall of the telescopic rubber body. One end of the telescopic spring is connected to the outer side wall of the telescopic rubber body, and the other end of the telescopic spring is connected to the adjustable bolt. The side wall of the packing gland body is provided with a bolt hole matched with the adjustable bolt. The side of the packing gland body close to the equipment is provided with an equipment cable tube. The application has stable structure, long service life, convenient execution and release working state and simple use process.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, specifically relating to a marine adjustable stuffing box and its usage method. Background Technology

[0002] Depth sounders and speed logs are instruments used by ships to measure water depth and speed. These instruments are mounted on the hull, and their cables pass through a sand-filled cable conduit for stability, to prevent swaying, impacts, and water corrosion. Therefore, how to connect the measuring equipment (depth sounder and speed log) to the sand-filled conduit is a problem that urgently needs to be solved. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides a marine adjustable stuffing box. This invention facilitates the rational arrangement of cable routing during subsequent ship construction, protecting the cables of depth sounders and log devices. Furthermore, this invention also provides a method for using the marine adjustable stuffing box.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, the present invention provides a marine adjustable stuffing box, comprising a stuffing box body, a hollow support ring, a retractable rubber body, a telescopic spring, an adjustable bolt, and an annular retaining ring. The retractable rubber body is disposed inside the stuffing box body. The hollow support ring connects the stuffing box body and the retractable rubber body. The annular retaining ring is disposed around the inner sidewall of the retractable rubber body. One end of the telescopic spring is connected to the outer sidewall of the retractable rubber body, and the other end is connected to the adjustable bolt. The sidewall of the stuffing box body is provided with bolt holes for installation in conjunction with the adjustable bolt. An equipment cable conduit is inserted into the side of the stuffing box body near the equipment end.

[0006] As a preferred technical solution, the stretchable rubber body has a cuboid structure, and a circular through hole is provided along the length direction of the stretchable rubber. The annular retaining ring is installed in a spiral shape on the inner wall of the circular through hole.

[0007] As a preferred technical solution, the stretchable rubber body is made of hard rubber, and the annular retaining ring is made of soft rubber.

[0008] As a preferred technical solution, the stuffing box body is made of stainless steel.

[0009] As a preferred technical solution, four telescopic springs are provided, and the telescopic springs are respectively connected to the four sides of the telescopic rubber body.

[0010] As a preferred technical solution, the hollow support ring includes four metal sheets, which connect the four corners of the stretchable rubber body to the inner wall of the stuffing box body.

[0011] As a preferred technical solution, the length of the stretchable rubber body is less than the length of the stuffing box body.

[0012] As a preferred technical solution, when the stuffing box is applied to a sealing box, it also includes a sealing mechanism. The sealing mechanism includes a suction cup and a sealing rubber body. The suction cup has openings at both ends. The sealing rubber body is arranged circumferentially along the opening at one end of the suction cup with a smaller opening. The sealing rubber body includes an outer rubber segment and an inner rubber segment. The inner rubber segment is folded inward and contracted inside the outer rubber segment. The thickness of the outer rubber segment gradually increases in the direction away from the suction cup, and the thickness of the inner rubber segment gradually decreases in the direction away from the suction cup.

[0013] As a preferred technical solution, when the inner rubber segment is completely folded inward and retracted inside the outer rubber segment, the sealing mechanism is in a relaxed state. At this time, the outer rubber segment and the inner rubber segment are fixed by a fixing pin. When fixing the cable, the fixing pin is pulled out, and the inner rubber segment is pulled outward. The combined thickness of the inner and outer rubber segments compresses the cable, thus completing the sealing and fixing.

[0014] In a second aspect, the present invention provides a method of using a marine adjustable stuffing box, comprising the following steps: before the cable is inserted, the adjustable bolt is rotated to rotate the telescopic spring outward, thereby causing the telescopic rubber body to expand laterally, the hollow support ring to contract, the inner diameter of the annular retaining ring to increase, and the cable to pass through the expanded space. After the cable is inserted, the adjustable bolt is turned into the stuffing box body, compressing the telescopic rubber body and the annular retaining ring to secure and seal the cable.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] (1) The retractable rubber body and annular retaining ring of the present invention can be customized according to the size of the cable. With the reasonable structure of other external components, it meets the requirements of sealing the cable hole of the equipment and makes the device more adaptable. When the adjustable diffuser is rotated to rotate the telescopic spring outward to a certain position, the cable can be easily passed into the equipment. Then, the adjustable bolt is turned into the stuffing box body, and the cable can be fastened and clamped by the retractable rubber body and annular retaining ring to seal the cable hole.

[0017] (2) The present invention has a stable structure, long service life, convenient operation and termination of working status, and simple operation process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view of the stuffing box flange of Embodiment 1 of the present invention.

[0020] Figure 2 This is a top view of the stuffing box flange of Embodiment 1 of the present invention.

[0021] Figure 3 This is a side view of the stuffing box flange of Embodiment 1 of the present invention.

[0022] Figure 4 This is a side view of the stuffing box flange of Embodiment 2 of the present invention.

[0023] Figure 5 This is a schematic diagram of the sealing mechanism in the stuffing box flange of Embodiment 2 of the present invention in the relaxed state.

[0024] Figure 6 This is a schematic diagram of the sealing mechanism in the stuffing box flange of Embodiment 2 of the present invention in the unfolded state.

[0025] Figure 7 This is a diagram of the upper part of the cable conduit passing through the compartment in this invention.

[0026] Figure 8 This is a partial view of the depth sounder or logger of the present invention and the lower part of the cable conduit.

[0027] Figure 9 This is a schematic diagram of the cable conduit structure of the present invention.

[0028] The specific descriptions of the reference numerals in the attached drawings are as follows: 1. Stuffing gland body; 2. Hollow support ring; 3. Annular retaining ring; 4. Adjustable bolt; 5. Telescopic spring; 6. Telescopic rubber body; 7. Cable conduit for equipment entry; 8. Flange with stuffing gland; 9. Sealing mechanism; 10. Suction cup; 11. Sealing rubber body; 12. Outer rubber section; 13. Inner rubber section; 14. Fixing pin. Detailed Implementation

[0029] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Example 1

[0030] This embodiment provides a marine adjustable stuffing box, including a stuffing box body 1, a hollow support ring 2, a retractable rubber body 6, a telescopic spring 5, an adjustable bolt 4, and an annular retaining ring 3. The retractable rubber body 6 is disposed inside the stuffing box body 1. The hollow support ring 2 connects the stuffing box body 1 and the retractable rubber body 6. The annular retaining ring 3 is arranged around the inner side wall of the retractable rubber body 6. One end of the telescopic spring 5 is connected to the outer side wall of the retractable rubber body 6, and the other end is connected to the adjustable bolt 4. The side wall of the stuffing box body 1 is provided with bolt holes that cooperate with the adjustable bolt 4 for installation. An equipment cable conduit 7 is installed on the side of the stuffing box body 1 near the equipment end.

[0031] The expandable rubber body 6 has a cuboid structure with a circular through hole along its length. The annular retaining ring 3 is spirally installed on the inner wall of the circular through hole. The expandable rubber body 6 is made of hard rubber, the annular retaining ring 3 is made of soft rubber, and the stuffing box body 1 is made of stainless steel. Four telescopic springs 5 ​​are provided, each connected to one of the four sides of the expandable rubber body 6. The hollow support ring 2 includes four metal sheets capable of withstanding bending stress. These metal sheets connect the four corners of the expandable rubber body 6 to the inner wall of the stuffing box body 1. The telescopic springs 5 ​​are spaced apart from the metal sheets.

[0032] The implementation method of the present invention includes the following steps:

[0033] Step 1: During production, the stuffing box is welded and fixed to the flange before leaving the factory.

[0034] Step 2: Before installation, the seamless steel pipe body of the cable conduit shall be inspected for tightness.

[0035] Step 3: Connect the cable conduit to the flange 8 with the stuffing box.

[0036] Step 4: When turning the adjustable bolt 4 to rotate the telescopic spring 5 in the outward direction, the telescopic rubber body 6 will be driven to expand sideways, and the hollow support ring 2 will contract, further expanding the cable passing space. Then, pass the cable through the stuffing box body 1;

[0037] Step 5: After the cable is inserted, turn the adjustable bolt 4 into the stuffing box body 1 to compress the telescopic rubber body 6 and the annular clamping ring 3 to tightly seal the cable, and it has a certain function of preventing water;

[0038] Step 6: Then, use waterproof caulking compound to block the outer depression to protect the inner waterproof rubber and increase durability;

[0039] Step 7: Inspection of the stuffing tightness at the end of the pipe; On the pipe that needs to do the inflation test, unscrew the marine drain plug on the pre-installed threaded joint, connect the inflation pipe, then tighten the outer nut of the threaded joint, open the air inlet valve to keep the pressure in the pipe at 0.03 MPa, and then close the air inlet valve; After the pipe is inflated, apply soap solution on the stuffing at the cable pipe port, and there should be no bubble phenomenon. If it is difficult to observe visually, a pressure gauge should be used for measurement, and it is qualified if the pressure remains unchanged for 1 hour; After the inflation test is over, still screw the marine drain plug onto the branch pipe threaded joint, tighten it and restore the tightness at that place;

[0040] Step 8: Sand filling; Generally, sand filling does not require an additional opening and directly uses the original cable inlet. It is also possible to flush and fill the vertically laid cable pipe through a special sand filling branch pipe;

[0041] Step 9: The vertically laid cable pipe should be filled solidly. When filling sand at the cable pipe where it turns to the inclined flat section, an oscillator should be temporarily installed or manually knocked;

[0042] Step 10: After filling the sand in the cable pipe, the upper opening of the cable pipe should be sealed with a stuffing box, including the sand filling port of the branch pipe.;

[0043] Step 11: 20 hours after the first sand filling, use an oscillator or manually knock, and check whether the cable pipe can continue to be filled with sand.

[0044] Step 12: If it is still possible to fill sand, repeat the operations in Step 8 and Step 9 until it is full. After filling sand, the cable pipe should be sealed. Example 2

[0045] This embodiment provides a marine adjustable stuffing box. The structure of the stuffing box in this embodiment is roughly the same as that in Embodiment 1. The difference is that this embodiment does not include a flange structure when applied to a sealing box, but adds a sealing mechanism 9. The sealing mechanism 9 includes a suction cup 10 and a sealing rubber body 11. The suction cup 10 has openings at both ends. The sealing rubber body 11 is arranged circumferentially along the opening at the end of the suction cup 10 with a small opening. The sealing rubber body 11 includes an outer rubber section 12 and an inner rubber section 13. The inner rubber section 13 is folded inward and contracted inside the outer rubber section 12. The thickness of the outer rubber section 12 gradually increases in the direction away from the suction cup 10, and the thickness of the inner rubber section 13 gradually decreases in the direction away from the suction cup 10. When the inner rubber segment 13 is folded inward and fully retracted inside the outer rubber segment 12, the sealing mechanism is in a relaxed state. The outer rubber segment 12 and the inner rubber segment 13 are fixed by the fixing pin 14 to facilitate the cable passing through. After the cable passes through, the fixing pin 14 is pulled out, and the inner rubber segment 13 is pulled outward. The inner rubber segment 13 and the outer rubber segment 12 overlap and compress the cable, thereby sealing and fixing it.

[0046] The sealing mechanism 9 is used when the stuffing box is fixed at the end of the sealing box. The suction cup 10 attaches the sealing mechanism 9 to the side of the stuffing box flange furthest from the sealing box. Initially, the inner rubber section 13 is completely folded inward and retracted into the outer rubber section 12. At this time, the inner diameter of the density rubber body 11 is relatively large, facilitating cable passage. After the cable passes through, the fixing pin 14 is pulled out, and the inner rubber section 13 is pulled outward. The inner rubber section 13 is then compressed, completing the cable seal. If leakage occurs in the sealing box or stuffing box, the suction cup 10 will loosen after a short time, requiring the application of waterproof sealant.

[0047] Although the above embodiments have provided a detailed description of the present invention, it should be understood by those skilled in the art that modifications or improvements can be made based on the disclosure of the present invention without departing from the spirit and scope of the invention, and such modifications and improvements are all within the spirit and scope of the present invention.

Claims

1. An adjustable stuffing box for marine use, characterized in that The utility model provides a filling funnel, which comprises a filling funnel body, a hollow supporting ring, a telescopic rubber body, telescopic springs, adjustable bolts and a ring-shaped clasp, wherein the telescopic rubber body is arranged inside the filling funnel body, the hollow supporting ring is connected between the filling funnel body and the telescopic rubber body, the ring-shaped clasp is arranged on the inner side wall of the telescopic rubber body, one end of the telescopic spring is connected to the outer side wall of the telescopic rubber body, and the other end of the telescopic spring is connected to the adjustable bolt, the side wall of the filling funnel body is provided with bolt holes for mounting the adjustable bolts, and the side of the filling funnel body close to the equipment is provided with an equipment cable tube.

2. An adjustable stuffing box for marine vessels as claimed in claim 1, wherein, The telescopic rubber body is a cuboid structure, and a circular through hole is formed in the length direction of the telescopic rubber body.

3. An adjustable stuffing box for marine use as claimed in claim 2, wherein, The telescopic rubber body is made of hard rubber, and the ring-shaped clasp is made of soft rubber.

4. An adjustable stuffing box for marine use as defined in claim 1 wherein, The filling funnel body is made of stainless steel.

5. An adjustable stuffing box for marine use as defined in claim 2 wherein, The telescopic springs are arranged in four, and each telescopic spring is connected to a side of the telescopic rubber body.

6. An adjustable stuffing box for marine use as defined in claim 2 wherein, The hollow supporting ring comprises four metal sheets, and the metal sheets are connected to the four corners of the telescopic rubber body and the inner side wall of the filling funnel body.

7. An adjustable stuffing box for marine use as defined in claim 1 wherein, The length of the telescopic rubber body is less than the length of the filling funnel body.

8. An adjustable stuffing box for marine use as defined in claim 1 wherein, When the filling funnel is applied to a sealed box, the filling funnel further comprises a sealing mechanism, wherein the sealing mechanism comprises a suction disc and a sealing rubber body, the two ends of the suction disc are open, the suction disc is provided with the sealing rubber body on the end with a small opening along the circumferential direction of the opening, the sealing rubber body comprises an outer rubber segment and an inner rubber segment, the inner rubber segment is folded inward and shrunk inside the outer rubber segment, the thickness of the outer rubber segment gradually increases in the direction away from the suction disc, and the thickness of the inner rubber segment gradually decreases in the direction away from the suction disc.

9. An adjustable stuffing box for marine use as claimed in claim 8 wherein, When the inner rubber segment is completely folded inward and shrunk inside the outer rubber segment, the sealing mechanism is in a relaxed state, at this time, the outer rubber segment and the inner rubber segment are fixed by a fixed pin, when a cable is fixed, the fixed pin is pulled out, the inner rubber segment is pulled outward, and the inner rubber segment and the outer rubber segment are pressed to the cable with the increased thickness, thereby completing the sealing and fixing.

10. A method of using a marine adjustable stuffing box according to any one of claims 1-9, characterized in that, The utility model provides a filling funnel, which comprises the following steps: Before the cable is inserted, the adjustable bolt is rotated to rotate the telescopic springs in the outward direction, thereby driving the telescopic rubber body to expand to the side, the hollow supporting ring is contracted, the inner diameter of the ring-shaped clasp is increased, the space is expanded, and the cable is inserted, then the adjustable bolt is rotated into the filling funnel body, the telescopic rubber body and the ring-shaped clasp are compressed to tightly seal the cable.

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