Self-locking type two-way sealing structure of pipeline inspection opening

Abstract

The self-locking type two-way sealing structure comprises a pipe body inspection opening connected to a pipeline and a cover body, a protruding locking block is arranged on the pipe wall of the outer edge of the opening portion of the pipe body inspection opening, and the locking block is an arc-shaped wedge block with one thick end and one thin end; the cover body is provided with a circular cover and a cover side wall surrounding the cover for a circle, the cover is in a flat plate shape, a circular plug protruding towards the inside of the cover is arranged in the middle of the cover, fixing blocks are arranged on the periphery in the cover side wall and correspond to the locking blocks, and the fixing blocks are arc-shaped blocks with equal height and thickness; a sealing ring is arranged between the pipe body inspection hole and the cover body; the cover body is firmly fixed to the pipe body inspection opening through the wedge-shaped self-locking structure between the fixing block and the locking block; the sealing ring and the inspection opening of the pipe body are mutually sleeved and clamped, and radial and circumferential bidirectional sealing is achieved through the annular sealing ring and the wedge-shaped sealing ring of the sealing ring, so that the problem that rust cannot be opened in the prior art is solved, bidirectional sealing is achieved, and the operation link of opening or closing the cover body is simplified.

Description

Technical Field

[0001] This invention relates to the field of sealing technology for inspection ports reserved on drainage pipe fittings or water storage objects, specifically providing a self-locking bidirectional sealing structure for pipe inspection ports. Background Technology

[0002] The existing inspection port design involves creating a flat surface by drilling a hole in the pipe fitting for maintenance. Threaded holes are drilled at both ends of this flat surface, and a flat cap is made to fit the shape of the hole and threaded holes. Threaded holes corresponding to the threaded holes are drilled at both ends of the flat cap. A rubber ring is placed between the flat cap and the flat surface of the hole, and bolts are used to press the flat cap tightly onto the flat surface of the hole to seal the inspection port. While this design seems reasonable, in practice, the bolts and threaded holes often rust shut, making it impossible to open and rendering it useless for maintenance. Sometimes, opening it requires unscrewing the bolt caps and dismantling the pipe, making it impossible to restore to its original state after maintenance. This is labor-intensive and makes maintenance extremely difficult. In drainage pipes and water storage containers, inspection ports are needed in many places for future inspection and cleaning. The rusted and difficult-to-open flat cap undoubtedly brings many inconveniences to maintenance and cleaning work.

[0003] There is an urgent need for a structure that allows the inspection port to be easily opened, easily restored to its original state after maintenance, will not rust and become stuck, and is simple, convenient, and has good sealing properties. Summary of the Invention

[0004] This invention provides a self-locking bidirectional sealing structure for pipe inspection ports, which aims to solve the technical problem that the flat cover bolts and screw holes in the inspection holes of drainage pipes or water storage objects are rusted together and cannot be opened, thus failing to perform the inspection function.

[0005] This invention is achieved through the following technical solution:

[0006] A self-locking bidirectional sealing structure for a pipe inspection port includes a pipe inspection port and a cover connected to a pipe. The pipe inspection port 2 is a circular pipe opening. A locking block 201 protruding outward is provided around the outer edge of the pipe wall of the circular pipe opening. The locking block 201 extends a certain length along the circumferential direction and forms an arc-shaped wedge block that is thick at one end and thin at the other end in the axial direction.

[0007] The cover 1 has a circular cover and a cover side wall integrally connected around the cover. The cover is flat and has a circular plug 102 protruding into the cover in the middle. The cover side wall has a fixing block 101 corresponding to the locking block 201 around its inner perimeter. The fixing block is an arc-shaped block of equal height and thickness that protrudes inward along the cover side wall and extends a certain length in the circumferential direction.

[0008] The cover covers the opening of the circular tube opening 2 of the tube body, and the side wall of the cover covers the outer edge of the tube wall of the opening. The fixing block 101 is movably engaged with the outer edge of the tube wall of the opening. The locking block 201 is embedded in the cover body and located on the bottom circumference of the fixing block 101. The locking block 201 is movably engaged with the side wall of the cover. The circular plug 102 is inserted into the opening of the circular tube opening 2, and a sealing ring 3 is provided between the circular plug 102 and the circular tube opening. The cover body is rotated so that the locking block 201 enters the bottom of the fixing block 101 from the thin end and gradually rotates towards the thick end of the locking block 201 until it is locked and fixed.

[0009] The self-locking bidirectional sealing structure of the pipeline inspection port includes a sealing ring 3 with a flat annular sealing ring 301 and an annular wedge-shaped sealing ring 302 standing up along the edge of the central hole of the annular sealing ring to form a bidirectional seal in the radial and circumferential directions between the cover and the inspection port; the wedge-shaped sealing ring 302 is inserted into the inside of the circular pipe opening and leaves a gap to fit around the outside of the circular plug 102.

[0010] The self-locking bidirectional sealing structure for a pipeline inspection port, wherein the cross-section of the wedge-shaped sealing ring 302 is wedge-shaped.

[0011] The self-locking bidirectional sealing structure for a pipe inspection port, wherein the fixing block 101 is shorter than the length of the locking block 201.

[0012] The self-locking bidirectional sealing structure for a pipeline inspection port includes four sets of fixing blocks 101 and locking blocks 201.

[0013] The self-locking bidirectional sealing structure of the pipe inspection port includes a pair of square wrench blocks 103 on the cover. The wrench blocks are rectangular lugs that extend symmetrically outward from both ends of the cover. The sidewalls of the wrench blocks are the same thickness as the cover, and the grooves of the wrench blocks are in communication with the interior of the cover.

[0014] The self-locking bidirectional sealing structure of the pipe inspection port is described above, wherein the outer side of the locking block 201 is close to the end face of the circular pipe port 2, and the inner side is an inclined surface forming a thick end, a thin end, and a transition section from the thin end to the thick end.

[0015] The self-locking bidirectional sealing structure of the pipeline inspection port is provided in which multiple concentric raised sealing rings 304 are provided on the contact surface between the annular sealing ring 301 of the sealing ring 3 and the cover.

[0016] The beneficial effects of this invention are:

[0017] The cover and the inspection port of the tube body of the present invention are firmly fixed by a wedge-shaped self-locking structure between the fixing block and the locking block; the sealing ring and the circular plug of the tube body inspection port and the cover body are interlocked, and the radial and circumferential bidirectional sealing of the tube body inspection port and the cover body is achieved by setting the sealing ring annular sealing ring and wedge-shaped sealing ring, which not only solves the problem of rust and blockage in the prior art, but also achieves bidirectional sealing and simplifies the operation of opening or closing the cover body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front view of the cover of the present invention.

[0019] Figure 2 This is a schematic diagram showing the inside of the cover of the present invention connected to the opening of the pipe inspection port, with the fixing block and locking block not locked.

[0020] Figure 3 This is a partial sectional view of the connection between the cover and the pipe inspection port. Figure 2 AA sectional view diagram,

[0021] Figure 4 This is a schematic diagram of the pipe inspection port opening and locking block structure (front view).

[0022] Figure 5 This is a schematic diagram of the pipe inspection port opening (rear view), locking block, and sealing ring structure.

[0023] Figure 6 yes Figure 5 A diagram of the right view.

[0024] Figure 7 yes Figure 5 BB cross-sectional diagram,

[0025] Figure 8 This is a schematic diagram of the internal structure of the cover and the fixing block structure of the present invention.

[0026] Figure 9 This is a schematic diagram of the side structure of the cover of the present invention.

[0027] Figure 10 yes Figure 8 CC cross-sectional diagram,

[0028] Figure 11 This is a schematic diagram of the structure of the fixing block of the cover and the locking block of the inspection port in the locked state of the present invention.

[0029] Figure 12 yes Figure 11 DD cross-sectional diagram,

[0030] Figure 13 This is a schematic diagram of the movement of the fixing block along the slope of the locking block according to the present invention.

[0031] Explanation of Figure Numbers

[0032] Fixing block 101, round plug 102, square wrench block 103

[0033] Circular pipe opening 2, locking block 201,

[0034] 3. Sealing ring; 301. Annular sealing ring; 302. Wedge-shaped sealing ring; 303. Concave arc-shaped oblique line; 304. Sealing ring.

[0035] Pipe 4;

[0036] Q represents the direction in which the fixed block moves along the slope of the locking block, and M represents the direction in which the cover moves synchronously. Detailed Implementation

[0037] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] See Figure 1-3 As shown, a self-locking bidirectional sealing structure for a pipe inspection port according to the present invention includes a pipe inspection port 2 and a cover 1 connected to a pipe. The pipe inspection port 2 is a circular opening, and outwardly protruding locking blocks 201 are provided around the outer edge of the pipe wall at the opening of the circular opening. (See also...) Figure 4-7 As shown, the locking block 201 extends a certain length along the circumferential direction and forms an arc-shaped wedge-shaped block that is thicker at one end and thinner at the other in the axial direction. (See figure) Figure 6 As shown;

[0039] See Figure 8-10 As shown, the cover 1 has a circular cover and a cover sidewall integrally connected around the cover. The cover is flat and has a centrally located, arched circular plug 102 protruding inward. The inner perimeter of the cover sidewall is provided with fixing blocks 101 corresponding to the locking block 201. (See figure) Figure 8 As shown, the fixing block is an arc-shaped block of equal height and thickness that protrudes inward along the side wall of the cover and extends a certain length in the circumferential direction, with arc-shaped chamfers at both ends;

[0040] The cover covers the opening of the circular opening of the inspection port 2 on the pipe body, see [reference]. Figure 3 As shown, the cover sidewall covers the outer edge of the tube wall at the opening. See [reference needed]. Figure 2 , 11 and Figure 12As shown in the enlarged view, the fixing block 101 is movably engaged with the outer edge of the tube wall of the opening; the locking block 201 is embedded in the cover body and located on the bottom circumference of the fixing block 101; the locking block 201 is movably engaged with the inner side wall of the cover; the circular plug 102 is inserted into the opening of the circular tube 2; a bidirectional sealing ring 3 is provided between the circular plug 102 and the circular tube opening; rotating the cover body causes the locking block 201 to enter the bottom of the fixing block 101 from the thin end, and gradually rotate towards the thick end of the locking block 201 until it is locked in place. See [reference needed]. Figure 11 As shown. Because the thickness of the locking block 201 gradually increases in the axial direction to a wedge-shaped structure, see [reference needed]. Figure 6 As shown, after entering the bottom of the fixing block 101, the thickness change caused by the rotation and the wedge-shaped structure of the locking block makes it tighter and tighter until it is completely locked. It can also be further tightened by moving the square wrench block 103. The square wrench extends the lever arm and can apply a greater rotational force to make the thicker part of the wedge-shaped structure of the locking block enter the bottom of the fixing block 101 and lock it more firmly.

[0041] The self-locking bidirectional sealing structure for a pipeline inspection port is described above. Figure 6 , 7 As shown in Figure 12, the sealing ring 3 comprises a flat annular sealing ring 301 and an annular wedge-shaped sealing ring 302 standing upright along the edge of the central hole of the annular sealing ring, forming a two-way seal in the radial and circumferential directions between the cover and the access port; the wedge-shaped sealing ring 302 is inserted into the opening of the circular pipe, and the flat annular sealing ring 301 is placed between the cover and the access port; a gap is left to fit around the circular plug 102, and the gap between the sealing ring 3 and the circular plug 102 serves to reduce the frictional resistance when the cover rotates. This invention sets the sealing ring as a two-way integrated connection structure, solving the circumferential and radial sealing between the cover and the access port. When the cover gradually enters the bottom of the fixing block 101 along with the locking wedge structure, since the locking wedge structure has a single-sided slope change, see... Figure 6 As shown, the slope of the inner side changes. As the cover rotates, the fixing block 101 moves towards the thicker area on the slope. Figure 13 That is, moving in the Q direction also simultaneously moves the cover towards the inspection port, i.e., in the M direction, further pressing the annular sealing ring 301, see Figure 12 The radial surface between the circular pipe opening and the cover is sealed. When water flows outward from inside the pipe, the wedge-shaped sealing ring 302 is squeezed outward to further seal the circular pipe opening in the circumferential direction. Due to its wedge-shaped structure, the compression sealing effect is enhanced, achieving bidirectional sealing, no leakage, and good sealing effect.

[0042] The self-locking bidirectional sealing structure for a pipe inspection port, wherein the wedge-shaped sealing ring 302 has a wedge-shaped cross-section, see [reference]. Figure 12 As shown. The wedge-shaped sealing ring design makes the circumferential seal tighter and the sealing ring position stable.

[0043] In the aforementioned self-locking bidirectional sealing structure for a pipe inspection port, preferably, the fixing block 101 is shorter than the length of the locking block 201. The shorter fixing block facilitates sliding on the locking block.

[0044] The self-locking bidirectional sealing structure for a pipe inspection port preferably includes four sets of corresponding fixing blocks 101 and locking blocks 201. The number of sets can be adjusted according to the size of the cover.

[0045] The self-locking bidirectional sealing structure for a pipe inspection port, preferably, includes a pair of square wrench blocks 103 on the cover. (See also...) Figure 11 As shown, the wrench block is a rectangular lug extending symmetrically outward from both ends of the cover. The sidewall of the wrench block is the same thickness as the cover, and the groove of the wrench block is connected to the interior of the cover. The extended lever arm of the square wrench block makes it easier to apply force.

[0046] The self-locking bidirectional sealing structure for a pipe inspection port, preferably, has the outer surface of the locking block 201 close to the end face of the circular pipe opening 2, and the inner surface forming a sloped section with a thick end, a thin end, and a transition section from the thin end to the thick end. This allows for a narrower overall width of the cover, saving material.

[0047] The self-locking bidirectional sealing structure for a pipe inspection port, wherein the annular sealing ring 301 of the sealing ring 3 has multiple concentric raised sealing rings 304 on the contact surface with the cover. (See also...) Figure 12 As shown, the raised sealing ring deforms during extrusion, forming multiple layers of reinforced seal, improving sealing accuracy, and reducing frictional resistance with the cover.

[0048] The method of using this invention: Referring to Figures 2 and 3, the cover of this invention is not yet locked to secure the pipe inspection port; the fixing block 101 and locking block 201 are in a separated state. See... Figure 11 , 12As shown, the cover of this invention is locked and secured to the pipe inspection port, with the fixing block 101 and locking block 201 in a self-locking state. In practical use, simply rotate the cover to screw the fixing block 101 into the bottom of the locking block 201 to lock the cover securely to the pipe inspection port. Because the pipe inspection port is connected to the pipe and cannot be rotated, only the cover can be rotated. To open the cover, simply rotate the cover in the opposite direction, or use the square wrench block 103 to unscrew the fixing block 101 from the bottom of the locking block 201 to easily remove the cover from the pipe inspection port. This is convenient, quick, and prevents the cover from rusting or becoming stuck.

Claims

1. A self-locking bidirectional sealing structure for a pipe inspection port, comprising a pipe inspection port and a cover connected to a pipe (4), characterized in that, The tube inspection port (2) is a circular tube opening. A locking block (201) protruding outward is provided around the outer edge of the tube wall of the circular tube opening. The locking block (201) extends a length along the circumferential direction and forms an arc-shaped wedge block that is thick at one end and thin at the other end in the axial direction. The cover (1) has a circular cover and a cover side wall integrally connected around the cover. The cover is flat and has a circular plug (102) protruding into the cover in the middle. Around the inner perimeter of the cover side wall, a fixing block (101) is provided corresponding to the locking block (201). The fixing block is an arc-shaped block of equal height and thickness that protrudes inward along the cover side wall and extends a certain length in the circumferential direction. The cover covers the opening of the circular tube opening of the tube inspection port (2), the side wall of the cover covers the outer edge of the tube wall of the opening, the fixing block (101) is movably engaged with the outer edge of the tube wall of the opening, the locking block (201) is embedded in the cover and located on the bottom circumference of the fixing block (101), the locking block (201) is movably engaged with the side wall of the cover; the circular plug (102) is inserted into the opening of the circular tube opening (2), and a sealing ring (3) is provided between the circular plug (102) and the circular tube opening; Rotate the cover to allow the locking block (201) to enter the bottom of the fixing block (101) from the thin end, and gradually rotate it towards the thick end of the locking block (201) until it is locked in place.

2. The self-locking bidirectional sealing structure for a pipeline inspection port as described in claim 1, characterized in that, The sealing ring (3) is provided with a flat annular sealing ring (301) and an annular wedge-shaped sealing ring (302) that stands up along the edge of the central hole of the annular sealing ring to form a two-way seal in the radial and circumferential directions between the cover and the inspection port; the wedge-shaped sealing ring (302) is inserted into the inside of the circular pipe opening and leaves a gap to fit outside the circular plug (102).

3. The self-locking bidirectional sealing structure for a pipeline inspection port as described in claim 2, characterized in that, The cross-section of the wedge-shaped sealing ring (302) is wedge-shaped.

4. The self-locking bidirectional sealing structure for a pipeline inspection port as described in claim 1, characterized in that, The fixing block (101) is shorter than the length of the locking block (201).

5. The self-locking bidirectional sealing structure for a pipeline inspection port as described in claim 1, characterized in that, The fixing block (101) and the locking block (201) are respectively arranged in four groups.

6. The self-locking bidirectional sealing structure for a pipeline inspection port as described in claim 1, characterized in that, The cover is provided with a pair of square wrench blocks (103). The wrench blocks are rectangular lugs that extend outward symmetrically from both ends of the cover. The sidewalls of the wrench blocks are the same thickness as the cover, and the grooves of the wrench blocks are connected to the interior of the cover.

7. The self-locking bidirectional sealing structure for a pipeline inspection port as described in claim 1, characterized in that, The outer surface of the locking block (201) is close to the end face of the circular tube opening (2), and the inner surface is a slope forming a thick end, a thin end, and a transition section from the thin end to the thick end.

8. The self-locking bidirectional sealing structure for a pipeline inspection port as described in claim 2, characterized in that, The annular sealing ring (301) of the sealing ring (3) is provided with multiple concentric raised sealing rings (304) on the contact surface between the sealing ring (3) and the cover.

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