Round pressure manhole

Abstract

The circular pressure manhole comprises a barrel and a manhole cover, a locking handle connected and locked with the manhole cover is rotationally arranged on the barrel, a connecting arm abutting against the locking handle is arranged on the manhole cover, a mounting opening is formed in the side, facing the locking handle, of the connecting arm, and the connecting arm is connected with the manhole cover in a sleeving mode. A positioning assembly clamped with the locking handle is arranged on the mounting opening, the positioning assembly comprises a fixed arm, a movable arm and a plurality of elastic pieces, the movable arm is arranged on one side of the fixed arm in a sliding mode, and the elastic pieces are arranged between the fixed arm and the movable arm in a clamping mode; the fixed arm and the movable arm achieve pressure contraction through an elastic piece and are clamped on the locking handle, the circular pressure manhole is provided, the problems of displacement and slipping after the locking handle is loosened are solved, and meanwhile the circular pressure manhole plays a role in positioning and supporting the locking handle.

Description

Technical Field

[0001] The utility model relates to the technical field of manholes, in particular to a circular pressure manhole. Background Art

[0002] A manhole is an opening used for personnel to enter and exit equipment for installation, maintenance, and safety inspections. It primarily consists of a short cylinder and a manhole cover. Manhole materials include carbon steel and stainless steel. Based on the pressure applied, manholes are classified as normal-pressure and pressure manholes. Based on their shape, they are categorized as circular, elliptical, and rectangular. When the circular normal-pressure manhole cover is closed, the locking handle on the cylinder engages the U-shaped support arm on the cover. The handle is then rotated downward to close the cover. If the handle becomes loose, it can slip from the opening on one side of the U-shaped support arm, causing the cover to remain open and closed relative to the cylinder, posing a significant safety hazard. Utility Model Content

[0003] In view of the above problems, the utility model proposes a circular pressure manhole to prevent the locking handle from being displaced and slipping after being loosened, and at the same time plays a role of positioning and supporting the locking handle.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a circular pressure manhole, a cylinder and a manhole cover, a locking handle rotatably provided on the cylinder for connecting and locking the manhole cover, a connecting arm abutting the locking handle provided on the manhole cover, a mounting opening provided on the connecting arm facing the locking handle, a positioning assembly for clamping with the locking handle provided on the mounting opening, the positioning assembly comprising a fixed arm, a movable arm and a plurality of elastic members, the movable arm being slidably arranged on one side of the fixed arm, the elastic member being clamped between the fixed arm and the movable arm, the fixed arm and the movable arm being pressure contracted and clamped on the locking handle through the elastic member.

[0005] By adopting the above technical solution, the locking handle is rotated toward the installation opening, abutting against the fixed arm while squeezing the movable arm, controlling the movable arm to slide to the side of the fixed arm and make way. At this time, the elastic member is squeezed by the movable arm and shrinks and makes way, so that the fixed arm and the movable arm pass through the middle of the locking handle. When the locking handle is rotated to the specified position, the fixed arm and the movable arm release the shrinkage pressure through the elastic member and are clamped on one side of the locking handle, preventing the locking handle from displacement and slipping after loosening, and at the same time playing a role of positioning support for one side of the locking handle.

[0006] The utility model is further configured such that a clearance gap is provided between the fixed arm and the movable arm, a support portion, a first extension bracket and a first abutment portion are provided on the fixed arm, one end of the support portion is connected to the mounting opening, and the other end is connected to the first extension bracket and extends toward the locking handle, the first abutment portion is connected to the first extension bracket and bends and extends toward the side away from the clearance gap, a second extension bracket and a second abutment portion are provided on the movable arm, which are mirror images of the first extension bracket and the first abutment portion, and the elastic member is clamped between the second extension bracket and the first extension bracket.

[0007] By adopting the above technical solution, the support part, the first extension bracket and the first abutment part play a role of fixed support, so that the second extension bracket and the second abutment part can stably move toward the first extension bracket, forming a unilateral fixed and unilateral movable structural combination.

[0008] The utility model is further configured such that a plurality of positioning seats are arranged in an array on one side of the first extension bracket facing the second extension bracket, a telescopic hole is provided on the positioning seat, a telescopic column corresponding to the telescopic hole is provided on the second extension bracket, one end of the elastic member is sleeved on the positioning seat, and the other end is sleeved on the outer circumference of the telescopic column and pressed against the second extension bracket.

[0009] By adopting the above technical solution, the positioning seat is used to form a limiting support for one side of the elastic member. When the telescopic column telescopes in the telescopic hole, the first extending bracket increases the pressing force on the elastic member.

[0010] The present invention is further configured such that two sliding legs are provided on the second extension bracket on a side away from the second abutting portion, and a sliding groove adapted for the sliding legs is provided on the support portion, and the sliding legs are slidably arranged in the sliding groove.

[0011] By adopting the above technical solution, the sliding smoothness of the second extension bracket is improved. When the second extension bracket is pressed, it can quickly slide to the side of the first extension bracket to make way.

[0012] The utility model is further configured such that the support portion is provided with a baffle on one side of the sliding leg, a first mounting hole is provided on the baffle, a corresponding second mounting hole is provided on the support portion, and a bolt is provided on the baffle, which passes through the first mounting hole in sequence and is tightened in the second mounting hole.

[0013] By adopting the above technical solution, a baffle is used to form a limit fixation on one side of the sliding support leg to prevent the movable arm from falling after installation.

[0014] The utility model is further configured such that the locking handle includes a screw cap and a screw rod, the screw cap is provided with an internal thread connected to the screw rod, and the screw rod is provided with an insertion opening for inserting a positioning component.

[0015] By adopting the above technical solution, the screw cap is threadedly connected to the screw rod and generates a locking force on the barrel and the manhole cover, and the plug-in opening is convenient for forming a clamping effect with the fixed arm and the movable arm after plugging.

[0016] The present invention is further configured such that two positioning protrusions are symmetrically provided on the support portion, and the positioning protrusions are protrudingly provided on one side of the plug-in opening.

[0017] By adopting the above technical solution, the fixed arm and the movable arm form a clamping limit on one side of the plug-in opening, and the two positioning protrusions form a positioning abutment on the other side of the plug-in opening, preventing the locking handle from displacing and slipping after loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 A cross-sectional view of the structure of the positioning assembly of the utility model;

[0020] Figure 3 This is an exploded view of the structure of the positioning component of the utility model.

[0021] In the figure; 1. cylinder; 2. manhole cover; 3. locking handle; 4. connecting arm; 5. mounting opening; 8. positioning assembly; 9. fixed arm; 10. movable arm; 11. elastic member; 12. clearance; 13. supporting portion; 14. first extension bracket; 15. first abutting portion; 16. second extension bracket; 17. second abutting portion; 18. positioning seat; 19. telescopic hole; 20. telescopic column; 21. sliding foot; 23. slide groove; 24. baffle; 25. first mounting hole; 26. second mounting hole; 27. bolt; 28. screw cap; 29. screw; 30. internal thread; 31. plug-in opening; 32. positioning protrusion. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example: As shown in the attached Figures 1 to 3The locking handle 3 shown in FIG2 is connected and locked, and the manhole cover 2 is provided with a connecting arm 4 that abuts against the locking handle 3. The connecting arm 4 is provided with a mounting opening 5 on the side facing the locking handle 3. The mounting opening 5 is provided with a positioning assembly 8 that is clamped with the locking handle 3. The positioning assembly 8 includes a fixed arm 9, a movable arm 10 and a plurality of elastic members 11 (specifically, a pressure spring, and three to four are provided). The movable arm 10 is slidably arranged on one side of the fixed arm 9, and the elastic member 11 is clamped between the fixed arm 9 and the movable arm 10. The fixed arm 9 is connected to the movable arm 10 through the elastic member 11. The pressure shrinks and clamps on the locking handle 3, and the locking handle 3 rotates toward the installation opening 5, abutting against the fixed arm 9 while squeezing the movable arm 10, controlling the movable arm 10 to slide to the side of the fixed arm 9 and make way. At this time, the elastic member 11 is squeezed by the movable arm 10 and shrinks and makes way, so that the fixed arm 9 and the movable arm 10 pass through the middle of the locking handle 3. When the locking handle 3 is rotated to the specified position, the fixed arm 9 and the movable arm 10 release the contraction pressure through the elastic member 11 and are clamped on one side of the locking handle 3 to prevent the locking handle 3 from displacement and slipping after loosening, and at the same time play a role in positioning and supporting one side of the locking handle 3.

[0024] As attached Figure 3 As shown, a clearance gap 12 is provided between the fixed arm 9 and the movable arm 10, and a support portion 13, a first extension bracket 14 and a first abutment portion 15 (specifically an integrated structure) are provided on the fixed arm 9, one end of the support portion 13 is connected to the mounting opening 5, and the other end is connected to the first extension bracket 14 and extends toward the side of the locking handle 3, the first abutment portion 15 is connected to the first extension bracket 14 and bends and extends toward the side away from the clearance gap 12, and the movable arm 10 is provided with a second extension bracket 16 and a second abutment portion 17 (specifically an integrated structure) which are mirror images of the first extension bracket 14 and the first abutment portion 15, and the elastic member 11 is clamped between the second extension bracket 16 and the first extension bracket 14, and the support portion 13, the first extension bracket 14 and the first abutment portion 15 play a role of fixed support, so that the second extension bracket 16 and the second abutment portion 17 can stably move toward the first extension bracket 14, forming a structural combination of unilateral fixation and unilateral movement.

[0025] As attached Figure 3As shown, a plurality of positioning seats 18 (specifically, an integrated structure) are arranged in an array on the side of the first extension bracket 14 facing the second extension bracket 16. A telescopic hole 19 is formed on the positioning seat 18. A telescopic column 20 (specifically, an integrated structure) corresponding to the telescopic hole 19 is provided on the second extension bracket 16. One end of the elastic member 11 is sleeved on the positioning seat 18, and the other end is sleeved on the outer circumferential surface of the telescopic column 20 and pressed against the second extension bracket 16. The positioning seat 18 is used to form a limiting support for one side of the elastic member 11. When the telescopic column 20 is telescopically extended in the telescopic hole 19, the first extension bracket 14 increases the pressing force on the elastic member 11.

[0026] As attached Figure 3 As shown, two sliding legs 21 (specifically, an integrated structure and an M-shaped arrangement) are provided on the side of the second extension bracket 16 away from the second abutting portion 17, and a sliding groove 23 adapted to the sliding legs 21 is provided on the support portion 13. The sliding legs 21 are slidably arranged in the sliding groove 23 to improve the sliding smoothness of the second extension bracket 16. When the second extension bracket 16 is subjected to pressure abutment, it can quickly slide to the side of the first extension bracket 14 to make way.

[0027] As attached Figure 3 As shown, the support portion 13 is provided with a baffle 24 on one side of the sliding leg 21, and a first mounting hole 25 is opened on the baffle 24. A corresponding second mounting hole 26 is opened on the support portion 13, and a bolt 27 is provided on the baffle 24. The bolt 27 passes through the first mounting hole 25 in sequence and is tightened in the second mounting hole 26. The baffle 24 is used to form a limit fixation on one side of the sliding leg 21 to prevent the movable arm 10 from falling after installation.

[0028] As attached Figure 2 As shown, the locking handle 3 includes a screw cap 28 and a screw rod 29. The screw cap 28 is provided with an internal thread 30 connected to the screw rod 29. The screw rod 29 is provided with a plug-in opening 31 for plugging in the positioning assembly 8. The screw cap 28 is threadedly connected to the screw rod 29 and produces a locking force on the cylinder 1 and the manhole cover 2. The plug-in opening 31 facilitates the clamping effect after plugging in with the fixed arm 9 and the movable arm 10.

[0029] As attached Figure 3As shown, two positioning protrusions 32 (specifically, an integrated structure) are symmetrically provided on the support portion 13. The positioning protrusions 32 are protruding on one side of the plug-in opening 31. The fixed arm 9 and the movable arm 10 form a locking limit on one side of the plug-in opening 31, while the two positioning protrusions 32 form a positioning abutment on the other side of the plug-in opening 31 to prevent the locking handle 3 from shifting and slipping after being loosened. In the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are merely relational terms determined to facilitate the description of the structural relationships of the various components or elements of the present utility model and do not specifically refer to any component or element in the present utility model and should not be understood as limiting the present utility model.

Claims

1. A circular pressure manhole, comprising a cylinder (1) and a manhole cover (2), wherein a locking handle (3) is rotatably provided on the cylinder (1) and is connected and locked with the manhole cover (2), characterized in that: The manhole cover (2) is provided with a connecting arm (4) that abuts against the locking handle (3); the connecting arm (4) is provided with a mounting opening (5) on the side facing the locking handle (3); the mounting opening (5) is provided with a positioning assembly (8) that is clamped with the locking handle (3); the positioning assembly (8) comprises a fixed arm (9), a movable arm (10) and a plurality of elastic members (11); the movable arm (10) is slidably arranged on one side of the fixed arm (9); the elastic member (11) is clamped between the fixed arm (9) and the movable arm (10); the fixed arm (9) and the movable arm (10) are compressed by the elastic member (11) and clamped on the locking handle (3).

2. A circular pressure manhole according to claim 1, characterized in that: A clearance gap (12) is provided between the fixed arm (9) and the movable arm (10); a support portion (13), a first extension bracket (14) and a first abutting portion (15) are provided on the fixed arm (9); one end of the support portion (13) is connected to the mounting opening (5), and the other end is connected to the first extension bracket (14) and extends toward the locking handle (3); the first abutting portion (15) is connected to the first extension bracket (14) and bends and extends toward a side away from the clearance gap (12); a second extension bracket (16) and a second abutting portion (17) are provided on the movable arm (10) and are mirror-imaged to the first extension bracket (14) and the first abutting portion (15); and the elastic member (11) is clamped between the second extension bracket (16) and the first extension bracket (14).

3. The circular pressure manhole according to claim 2, characterized in that: The first extension bracket (14) is provided with a plurality of positioning seats (18) in an array on one side facing the second extension bracket (16), a telescopic hole (19) is provided on the positioning seat (18), and a telescopic column (20) corresponding to the telescopic hole (19) is provided on the second extension bracket (16). One end of the elastic member (11) is sleeved on the positioning seat (18), and the other end is sleeved on the outer peripheral surface of the telescopic column (20) and pressed against the second extension bracket (16).

4. The circular pressure manhole according to claim 3, characterized in that: Two sliding legs (21) are provided on the second extension bracket (16) at a side away from the second abutting portion (17); a sliding groove (23) adapted to the sliding legs (21) is provided on the support portion (13); and the sliding legs (21) are slidingly arranged in the sliding groove (23).

5. The circular pressure manhole according to claim 4, characterized in that: The support portion (13) is provided with a baffle (24) on one side of the sliding support leg (21), a first mounting hole (25) is provided on the baffle (24), a corresponding second mounting hole (26) is provided on the support portion (13), and a bolt (27) is provided on the baffle (24), and the bolt (27) passes through the first mounting hole (25) in sequence and is tightened in the second mounting hole (26).

6. The circular pressure manhole according to claim 1, characterized in that: The locking handle (3) comprises a screw cap (28) and a screw rod (29); the screw cap (28) is provided with an internal thread (30) connected to the screw rod (29); and the screw rod (29) is provided with an insertion opening (31) for inserting a positioning assembly (8).

7. The circular pressure manhole according to claim 2, characterized in that: Two positioning protrusions (32) are symmetrically arranged on the support portion (13), and the positioning protrusions (32) are protrudingly arranged on one side of the plug opening (31).

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