Flat clamp

Abstract

The utility model relates to a flat clamp and belongs to the technical field of fasteners. The device comprises an annular body, the body comprises an outer strap and an inner strap, the inner surface of the outer strap is tightly attached to the periphery of the inner strap, the two ends of the outer strap are locked and connected through a locking mechanism, and the outer strap and the inner strap are made of stainless steel; the two ends of the inner strap are a first end and a second end respectively, and the first end and the second end are detachably connected; a clamping structure is arranged between the first end and the second end, the clamping structure comprises a positioning slot, two elastic propping sheets and a positioning insertion sheet, the positioning slot and the two elastic propping sheets are formed at the first end, the positioning insertion sheet is formed at the second end, the two elastic propping sheets are respectively positioned on two sides of a notch of the positioning slot, and the positioning insertion sheet is inserted into the positioning slot when the first end is jointed with the second end; the elastic abutting pieces on the two sides of the positioning insertion groove abut against the two side edges of the positioning insertion piece respectively. The flat clamp is reasonable in structure and suitable for pipeline sealing connection, has the advantages of being good in sealing performance, stable in use performance and the like, and has good practicability.

Description

Technical Field

[0001] The utility model relates to a flat clamp and belongs to the field of fastener structure design. Background Art

[0002] The clamp is a common fastener. It is easy to use and has strong clamping force. It is widely used in the fields of automobiles, ships, petroleum, chemicals, etc. Sometimes it is necessary to seal and connect two pipes of the same specification. At this time, a sealing clamp is needed. The existing sealing clamps are mostly provided with sealing pads inside. After the clamps are locked, the sealing pads are fitted with the pipe surface to achieve sealing. However, the sealing pads in the existing sealing clamps are mostly made of rubber, which has poor high temperature resistance. Moreover, the sealing pads will age over time, which will affect the performance of the clamps. Utility Model Content

[0003] To solve this problem, the utility model provides a flat clamp with stable sealing performance.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a flat clamp, comprising a ring-shaped body, the body comprising an outer band and an inner band, the inner surface of the outer band is tightly attached to the outer peripheral side of the inner band, the two ends of the outer band are locked and connected by a locking mechanism, the outer band and the inner band are made of stainless steel, and the inner surface of the inner band is a smooth surface;

[0006] The two ends of the inner cuff are respectively a first end and a second end, and the first end and the second end are detachably connected;

[0007] At least two engaging structures are arranged between the first end and the second end along the axial direction of the main body, each engaging structure includes a positioning slot and two elastic retaining sheets formed at the first end, and a positioning plug formed at the second end, the two elastic retaining sheets are respectively located on both sides of the notch of the positioning slot, when the first end is engaged with the second end, the positioning plug is inserted into the positioning slot, and the elastic retaining sheets on both sides of the positioning slot are respectively abutted against the two side edges of the positioning plug.

[0008] In some embodiments, the two elastic pressing pieces in each engaging structure are symmetrically arranged, and the distance between the two elastic pressing pieces gradually decreases from the outside to the inside along the positioning slot, and the minimum distance is smaller than the width of the positioning insert.

[0009] In some embodiments, the root of the positioning plug is an isosceles trapezoidal shape, and its front end is a rectangle. The inner end width of the positioning slot is a rectangle that matches the width of the front end of the positioning plug. When the first end is engaged with the second end, the front end of the positioning plug is inserted into the inner end of the positioning slot, and the root of the positioning plug is located between two elastic tightening plates.

[0010] In some embodiments, an edge of one end of the elastic retaining piece facing the bottom of the positioning slot is arc-shaped.

[0011] In some embodiments, the two ends of the outer band are respectively bent outwardly and fixedly connected to the outer band to form a first ring and a second ring, and a first clearance perforation and a second clearance perforation are respectively provided on the side walls of the first ring and the second ring;

[0012] The locking mechanism includes a first positioning pin, a second positioning pin and a locking bolt. The first positioning pin is inserted into the first sleeve ring, and the second positioning pin is inserted into the second sleeve ring. The first positioning pin is provided with a bolt through hole extending radially therethrough, and the second positioning pin is provided with a threaded hole extending radially therethrough. The locking bolt passes through the bolt through hole and is threadedly connected to the threaded hole.

[0013] In some embodiments, the inner band and the outer band are fixed by multi-point welding; the joints at both ends of the outer band and the joints at both ends of the inner band are staggered in the circumferential direction of the body.

[0014] In some embodiments, the outer band and the inner band are made of stainless steel.

[0015] The utility model has the positive effects: in the utility model, the structure is optimized, the use of sealing pads is abandoned, and the pipes of the same specifications are directly connected and sealed through the inner hoop 2 made of stainless steel. It has good high temperature resistance and will not show the stability of aging of the sealing pad, thereby ensuring the stability of the sealing performance of the flat clamp, and has good practicality and popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the flat clamp in the utility model;

[0018] Figure 2 for Figure 1 An exploded view of the flat clamp shown in;

[0019] Figure 3 It is a schematic diagram of the structure of the inner hoop in the utility model;

[0020] Figure 4It is a structural schematic diagram of the locking mechanism in the utility model.

[0021] The reference numerals shown in the figure are: 1-outer band; 11-first ring; 12-second ring; 13-first clearance hole; 14-second clearance hole; 15-first positioning pin; 16-second positioning pin; 17-bolt hole; 18-threaded hole; 19-locking bolt; 2-inner band; 21-first end; 211-positioning slot; 212-elastic tightening plate; 22-second end; 221-positioning insert. DETAILED DESCRIPTION

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

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In the present utility model, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] The flat clamp structure provided in the embodiment of the utility model is as follows Figures 1 to 4As shown, it includes a ring-shaped body, the body includes an outer band 1 and an inner band 2, the outer band 1 and the inner band 2 are made of stainless steel, the inner surface of the inner band 2 is a smooth surface, the inner surface of the outer band 1 is tightly attached to the outer peripheral side of the inner band 2, and the two ends of the outer band 1 are locked and connected by a locking mechanism; the two ends of the inner band 2 are respectively a first end 21 and a second end 22, and the first end 21 and the second end 22 are detachably engaged; two clamping structures are arranged between the first end 21 and the second end 22 along the axial direction of the body, each clamping structure includes a positioning slot 211 and two elastic abutting sheets 212 formed at the first end 21, and a positioning insert 221 formed at the second end 22, the two elastic abutting sheets 212 are respectively located on both sides of the notch of the positioning slot 211, and when the first end 21 is engaged with the second end 22, the positioning insert 221 is inserted into the positioning slot 211, The elastic abutting pieces 212 on both sides of the positioning slot 211 are respectively abutted against the two side edges of the positioning plug 221; when the flat clamp in this embodiment is used, the two pipes are butt-jointed and the flat clamp is sleeved on the pipe butt joint, the inner surface of the inner hoop 2 is close to the pipe surface, the positioning plug 221 is inserted into the positioning slot 211, and then the outer hoop 1 is locked by the locking mechanism. During the locking process, the inner hoop 2 is continuously tightened, so that the positioning plug 221 is continuously inserted into the positioning slot 211, and the elastic abutting pieces 212 are tightly attached to the side edges of the positioning plug 221 to achieve sealing. The two clamping structures can form at least four seals along the axial direction of the body, which can ensure the sealing of the pipe butt joint, and the joint of the two pipes is between the two clamping structures; in this embodiment, there are two clamping structures, and in actual operation, the number of the clamping structures can also be increased according to the increase in the width of the inner hoop 2.

[0026] The flat clamp in this embodiment does not use a sealing gasket, and directly connects and seals pipes of the same specification through an inner clamp band 2 made of stainless steel. It has good high temperature resistance and will not experience aging of the sealing gasket, thereby ensuring the stability of the sealing performance of the flat clamp, and has good practicality and applicability.

[0027] Alternatively, if Figure 3 As shown, the two elastic clamping sheets 212 in each snap-fitting structure are symmetrically arranged, and the distance between the two elastic clamping sheets 212 gradually decreases from the outside to the inside along the positioning slot 211, and the minimum distance is smaller than the width of the positioning plug 221. In this way, it can be ensured that after the positioning plug 221 is inserted into the positioning slot 211, the elastic clamping sheets 212 on both sides of the positioning plug 221 can be more effectively pressed against the side of the positioning plug 221 to ensure the sealing; in each snap-fitting structure, a seal is formed at the point where the two elastic clamping sheets 212 contact the positioning plug 221.

[0028] like Figure 3As shown, the root of the positioning plug 221 is in the shape of an isosceles trapezoid, and its front end is in the shape of a rectangle. The inner end width of the positioning slot 211 is in the shape of a rectangle that matches the width of the front end of the positioning plug 221. When the first end 21 and the second end 22 are engaged, the front end of the positioning plug 221 is inserted into the inner end of the positioning slot 211, and the root of the positioning plug 221 is located between the two elastic retaining sheets 212. As the positioning plug 221 continues to be inserted into the positioning slot 211, the two elastic retaining sheets 212 are tightly attached to the hypotenuses on both sides of the root of the positioning plug 221.

[0029] Optionally, the edge of one end of the elastic retaining piece 212 facing the bottom of the positioning slot 211 is arc-shaped, so that the positioning inserting piece 221 can be inserted into and withdrawn from the positioning slot 211 more smoothly to avoid jamming.

[0030] Alternatively, if Figure 1 , Figure 2 and Figure 4 As shown, the two ends of the outer hoop 1 are respectively bent outward in reverse and fixedly connected to the outer hoop 1 to form a first ring 11 and a second ring 12, and a first clearance hole 13 and a second clearance hole 14 are respectively provided on the side walls of the first ring 11 and the second ring 12, and the first clearance hole 13 and the second clearance hole 14 are used for installing the locking mechanism to allow the locking bolt 9 to pass through.

[0031] The locking mechanism includes a first locating pin 15, a second locating pin 16 and a locking bolt 19. The first locating pin 15 is inserted into the first sleeve ring 11, and the second locating pin 16 is inserted into the second sleeve ring 12. The first locating pin 15 is provided with a bolt through hole 17 penetrating in the radial direction, and the second locating pin 16 is provided with a threaded hole 18 penetrating in the radial direction. The locking bolt 19 passes through the bolt through hole 17 and is screwed with the threaded hole 18. The outer hoop 1 is tightened and loosened by screwing the locking bolt 19.

[0032] In some embodiments, the inner band 2 and the outer band 1 are welded at multiple points to fix the two, prevent the inner band 2 and the outer band 1 from separating and misaligning, and ensure the tightening effect during use; the joining parts at both ends of the outer band 1 and the joining parts at both ends of the inner band 2 are staggered in the circumferential direction of the main body to ensure the sealing effect of the inner band 2 when in use.

[0033] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A flat clamp, comprising an annular body, the body comprising an outer band (1) and an inner band (2), the inner surface of the outer band (1) being in close contact with the outer peripheral side of the inner band (2), the two ends of the outer band (1) being locked and connected by a locking mechanism, the outer band (1) and the inner band (2) being made of stainless steel, and the inner surface of the inner band (2) being a smooth surface; It is characterized in that The two ends of the inner band (2) are respectively a first end (21) and a second end (22), and the first end (21) and the second end (22) are detachably connected; At least two engaging structures are arranged between the first end (21) and the second end (22) along the axial direction of the body, each engaging structure comprising a positioning slot (211) and two elastic abutting pieces (212) formed at the first end (21), and a positioning insert (221) formed at the second end (22), the two elastic abutting pieces (212) being respectively located at two sides of a notch of the positioning slot (211), and when the first end (21) and the second end (22) are engaged, the positioning insert (221) is inserted into the positioning slot (211), and the elastic abutting pieces (212) at two sides of the positioning slot (211) are respectively abutted against two side edges of the positioning insert (221).

2. The flat clamp according to claim 1, characterized in that: The two elastic abutting pieces (212) in each engaging structure are symmetrically arranged, and the spacing between the two elastic abutting pieces (212) gradually decreases from the outside to the inside along the positioning slot (211), and the minimum spacing is smaller than the width of the positioning insert (221).

3. The flat clamp according to claim 2, characterized in that: The root of the positioning plug (221) is in the shape of an isosceles trapezoid, and its front end is in the shape of a rectangle. The inner width of the positioning slot (211) is in the shape of a rectangle that matches the width of the front end of the positioning plug (221). When the first end (21) and the second end (22) are engaged, the front end of the positioning plug (221) is inserted into the inner end of the positioning slot (211), and the root of the positioning plug (221) is located between the two elastic abutting pieces (212).

4. The flat clamp according to claim 2, characterized in that: The elastic pressing piece (212) An edge at one end facing the bottom of the positioning slot (211) is arc-shaped.

5. The flat clamp according to claim 1, characterized in that: The two ends of the outer band (1) are respectively bent outward in opposite directions and fixedly connected to the outer band (1) to form a first ring (11) and a second ring (12), and a first clearance hole (13) and a second clearance hole (14) are respectively provided on the side walls of the first ring (11) and the second ring (12); The locking mechanism comprises a first positioning pin (15), a second positioning pin (16) and a locking bolt (19); the first positioning pin (15) is inserted into the first sleeve ring (11); the second positioning pin (16) is inserted into the second sleeve ring (12); the first positioning pin (15) is provided with a bolt through hole (17) penetrating in the radial direction; the second positioning pin (16) is provided with a threaded hole (18) penetrating in the radial direction; the locking bolt (19) passes through the bolt through hole (17) and is screwed to the threaded hole (18).

6. The flat clamp according to claim 1, characterized in that: The inner hoop (2) and the outer hoop (1) are fixed by multi-point welding; the joints at both ends of the outer hoop (1) and the joints at both ends of the inner hoop (2) are staggered in the circumferential direction of the body.

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