A non-bonding and slow-bonding prestressed tendon peeling device

Abstract

The present invention provides a non-bonded, slow-bonded prestressed tendon peeling device, including a ring-cutting shear assembly and a longitudinal cutting shear assembly which are sleeved on each other, the ring-cutting shear assembly including a first ring-cutting body and a second ring-cutting body which are hinged to each other, the longitudinal cutting shear assembly including a first longitudinal cutting body and a second longitudinal cutting body which are hinged to each other, and the first ring-cutting body, the second ring-cutting body, the first longitudinal cutting body and the second longitudinal cutting body are coaxially hinged through the same set of hinged components, the first ring-cutting body, the second ring-cutting body, the first longitudinal cutting body and the second longitudinal cutting body respectively have a gripping end and a cutting end, the cutting end of the first ring-cutting body and the cutting end of the second ring-cutting body can cooperate to perform ring cutting on the sheath of the prestressed tendon, and the cutting end of the first longitudinal cutting body and the cutting end of the second longitudinal cutting body can perform longitudinal cutting on the sheath of the prestressed tendon. The present invention can achieve the effect that the sheath and grease or slow-setting adhesive are easy to clean, the sheath cleaning length is not limited, and the blade or saw blade is not easily damaged.

Description

Technical Field

[0001] The invention relates to a prestressed tendon processing tool in the process of building construction, in particular to a non-bonding and slow-bonding prestressed tendon peeling device. Background Art

[0002] Non-bonded and slow-bonded prestressing technology has been widely used in prestressed construction. During the construction process, the sheaths of both ends (fixed end and tensioning end) of non-bonded and slow-bonded prestressed tendons need to be cleaned. The fixed end needs to be cleaned before installing the extrusion anchor, and the tensioning end needs to be cleaned before the tensioning process is carried out after the prestressed tendons are poured with concrete. However, there are currently no practical tools for cleaning prestressed tendon sheaths. The traditional method adopted by construction workers is to clean the sheaths by manually cutting the sheaths with cutting tools such as utility knives. This method is inefficient, has poor cleaning effects, and the tools are easily worn. In addition, the skin of construction workers is easily in direct contact with grease and slow-setting adhesives, which often leads to skin allergies among construction workers.

[0003] To solve these problems, relevant practitioners have invented a cleaning device. The cleaning device consists of a steel pipe split into two halves, which are cross-arranged and hinged to each other to form a scissor-like structure, one end of which is an arc-shaped clamping end, and the inner sides of the arc openings of the two clamping ends are respectively provided with blades or saw blades, and the other end is a gripping end. The two gripping ends move closer to or away from each other with the hinge point as the center of the circle, driving the two clamping ends to move closer to each other to perform circular cutting or separation on the sheath, and an electric heating component is provided to heat the grease or slow-setting adhesive in the sheath to be cleaned, so as to improve the cleaning speed and cleaning effect of the grease or slow-setting adhesive.

[0004] The cleaning device has at least the following deficiencies during use:

[0005] 1. After the cleaning device performs circumcision on the sheath, the cut sheath needs to be pulled out from the steel strand. When the sheath to be cleaned is long, the cut sheath will be difficult to be pulled out from the steel strand due to the large friction resistance between the cut sheath and the steel strand.

[0006] 2. Since the grease or slow-setting adhesive in the heating jacket needs to heat the jacket so that the heat is transferred from the outer jacket to the inner grease or slow-setting adhesive, and the heat transfer takes a certain amount of time, the cleaning device uses electric heating to improve the cleaning effect and cleaning speed, which results in a problem of prolonged operation time. At the same time, there are also problems such as the electric heating component needs to be connected to a power source, and the heating operation for a longer jacket is more complicated.

[0007] 3. The length of the sheath that needs to be cleaned at the fixed end of the existing non-bonded and slow-bonded prestressed tendons is generally about 0.1m to 0.2m (the length required to be cleaned varies depending on the specifications of the prestressed tendons), while the length of the sheath that needs to be cleaned at the tensioning end is generally about 0.8m. Since the end of the prestressed tendon cannot exceed the hinge point, the cleaning device cannot clean a long sheath, which has great limitations;

[0008] 4. The blade or saw blade at the clamping end of the cleaning device is likely to come into contact with the internal steel strand when shearing the prestressed tendon sheath, which may easily cause damage to the blade or saw blade.

[0009] In summary, a non-bonded, slow-bonding prestressed tendon stripper that is easy to clean the sheath and grease or slow-setting adhesive, has no limit on the sheath cleaning length, and is not easily damaged by the blade or saw blade is a problem that needs to be urgently solved in the field. Summary of the invention

[0010] The purpose of the present invention is to provide a non-bonding and slow-bonding prestressed tendon stripper, which can achieve the effect of easy cleaning of the sheath and grease or slow-setting adhesive.

[0011] Another object of the present invention is to provide a non-bonding and slow-bonding prestressed tendon stripper, which can achieve the effect of unlimited sheath cleaning length.

[0012] Another object of the present invention is to provide a non-bonding and slow-bonding prestressed tendon stripper, which can achieve the effect of preventing the blade or saw blade from being easily damaged.

[0013] To achieve the above-mentioned purpose, the present invention provides a non-bonded, slow-bonded prestressed tendon stripper, wherein the non-bonded, slow-bonded prestressed tendon stripper comprises a ring-cutting shear assembly and a longitudinal cutting shear assembly which are mutually sleeved, the ring-cutting shear assembly comprises a first ring-cutting body and a second ring-cutting body which are hinged to each other, the longitudinal cutting shear assembly comprises a first longitudinal cutting body and a second longitudinal cutting body which are hinged to each other, and the first ring-cutting body, the second ring-cutting body, the first longitudinal cutting body and the second longitudinal cutting body are coaxially hinged through the same set of hinged components, and the first ring-cutting body, the second ring-cutting body, the first longitudinal cutting body and the second longitudinal cutting body respectively have a gripping end and a cutting end;

[0014] The cutting end of the first ring cutting body and the cutting end of the second ring cutting body can cooperate to perform ring cutting on the sheath of the prestressed tendon, and the cutting end of the first longitudinal cutting body and the cutting end of the second longitudinal cutting body can perform longitudinal cutting on the sheath of the prestressed tendon. By adjusting the distance between the holding end of the first ring cutting body and the holding end of the second ring cutting body, the degree of opening and closing between the cutting end of the first ring cutting body and the cutting end of the second ring cutting body can be adjusted, and by adjusting the distance between the holding end of the first longitudinal cutting body and the holding end of the second longitudinal cutting body, the degree of opening and closing between the cutting end of the first longitudinal cutting body and the cutting end of the second longitudinal cutting body can be adjusted.

[0015] As described above, the non-bonded and slow-bonded prestressed tendon stripper, wherein the first ring cutting body includes a first ring cutting head, a first connecting part, a first hinged part and a first gripping part connected in sequence; the second ring cutting body includes a second ring cutting head, a second connecting part, a second hinged part and a second gripping part connected in sequence; the first longitudinal cutting body includes a third connecting part, a third hinged part and a third gripping part connected in sequence, and the end of the third connecting part away from the third hinged part forms the first longitudinal cutting head; the second longitudinal cutting body includes a fourth connecting part, a fourth hinged part and a fourth gripping part connected in sequence, and the end of the fourth connecting part away from the fourth hinged part forms the second longitudinal cutting head; the first hinged part, the second hinged part, the third hinged part and the fourth hinged part are coaxially hinged by the same group of hinged components.

[0016] As described above, the non-bonded and slow-bonded prestressed tendon stripper, wherein the first connecting part includes two first connecting rods arranged in parallel and spaced apart, one end of the two first connecting rods are connected to the first hinged part, and the other end of the two first connecting rods are connected to the first circular cutting blade head; the second connecting part includes two second connecting rods arranged in parallel and spaced apart, one end of the two second connecting rods are connected to the second hinged part, and the other end of the two second connecting rods are connected to the second circular cutting blade head; the third connecting part includes a third connecting rod, one end of the third connecting rod is connected to the third hinged part, and the other end of the third connecting rod forms the first longitudinal cutting blade head; the fourth connecting part includes a fourth connecting rod, one end of the fourth connecting rod is connected to the fourth hinged part, and the other end of the fourth connecting rod forms the second longitudinal cutting blade head; during the rotation of the first hinged part, the second hinged part, the third hinged part and the fourth hinged part along the hinged component, the third connecting rod can extend between the two first connecting rods, and the fourth connecting rod can extend between the two second connecting rods.

[0017] As described above, the non-bonded and slow-bonded prestressed tendon stripper, wherein the first circular cutting head and the second circular cutting head both include a semicircular head seat, each of the head seats is provided with a plurality of circular cutting blades evenly spaced along its circumference, the end of the third connecting part away from the third hinged part is connected to a longitudinal cutting blade to form the first longitudinal cutting head, and the end of the fourth connecting part away from the fourth hinged part is connected to a longitudinal cutting blade to form the second longitudinal cutting head.

[0018] As described above, the non-bonded and slow-bonded prestressed tendon stripper, wherein the first hinge part, the second hinge part, the third hinge part and the fourth hinge part each include two parallel and oppositely arranged hinged pieces, the hinge component includes a hinge support and two hinge pins, one hinge piece of the first hinge part, one hinge piece of the second hinge part, one hinge piece of the third hinge part and one hinge piece of the fourth hinge part are connected to one side surface of the hinge support through one hinge pin, and the other hinge piece of the first hinge part, the other hinge piece of the second hinge part, the other hinge piece of the third hinge part and the other hinge piece of the fourth hinge part are connected to the other side surface of the hinge support through another hinge pin.

[0019] As described above, the non-bonded and slow-bonded prestressed tendon stripper, wherein the articulated support is a tubular structure which is open at both ends and hollow inside, one end of the articulated support faces the cutting end of the first annular cutting body, the cutting end of the second annular cutting body, the cutting end of the first longitudinal cutting body and the cutting end of the second longitudinal cutting body, the other end of the articulated support faces the holding end of the first annular cutting body, the holding end of the second annular cutting body, the holding end of the first longitudinal cutting body and the holding end of the second longitudinal cutting body, and the ends of the two articulated pins connected to the articulated support are buried inside the side wall of the articulated support.

[0020] As described above, the non-bonding and slow-bonding prestressed tendon stripper, wherein a sheath positioning sleeve is detachably positioned and inserted inside the articulated support, and the sheath positioning sleeve includes a base tube with openings at both ends and a hollow interior, and an end face of the base tube has a plurality of claws extending along its axial direction, and each of the claws is evenly spaced along the circumference of the base tube, and a part of the base tube and each of the claws is positioned and inserted in the articulated support, and an end of each of the claws extends in the direction of the cutting end of the first annular cutting body, the cutting end of the second annular cutting body, the cutting end of the first longitudinal cutting body and the cutting end of the second longitudinal cutting body.

[0021] As described above, the non-bonding and slow-bonding prestressed tendon stripper, wherein one end of the base tube away from each of the claws protrudes to the outside of the hinged support, and the outer positioning sleeve of the part of the one end of the base tube away from each of the claws protrudes to the outside of the hinged support is provided with a limiting ring, and the limiting ring can abut against the end face of the hinged support that is closer to the end.

[0022] As described above, the non-bonding and slow-bonding prestressed tendon stripper, wherein an adjustment ring is sleeved on the outer side of each of the claws located outside the hinged support.

[0023] As described above, in the non-bonding and slow-bonding prestressed tendon stripper, elastic limiting components are connected between the first ring cutting body, the second ring cutting body, the first longitudinal cutting body and the second longitudinal cutting body and the hinged support.

[0024] Compared with the prior art, the advantages of the present invention are as follows:

[0025] 1. The non-bonded and slow-bonded prestressed tendon stripper provided by the present invention can perform both ring cutting and longitudinal cutting of the sheath by arranging a ring cutting shear assembly and a longitudinal cutting shear assembly, so that only a small part of the cut sheath is in a complete circular ring shape and is still wrapped around the outside of the steel strand, while the other parts can no longer be tightly wrapped around the outside of the steel strand like the circular ring parts due to being longitudinally cut, thereby effectively reducing the friction resistance between the cut sheath and the steel strand, making it easy for the cut sheath to be pulled off the steel strand; at the same time, in the process of the cut sheath being pulled off the steel strand, the longitudinal gap formed at the longitudinal cutting position and the circular ring part that has not been longitudinally cut can scrape off the grease or slow-setting adhesive on the steel strand, thereby effectively cleaning the grease and slow-setting adhesive on the steel strand.

[0026] 2. The present invention provides a non-bonding and slow-bonding prestressed tendon stripper, in which the hinged support of the hinged component is not penetrated by two hinged pins, and the setting of the two hinged pins will not cause any restriction on the axial penetration length of the prestressed tendon inside the hinged support, thereby achieving the effect of unlimited sheath cleaning length.

[0027] 3. The non-bonding and slow-bonding prestressed tendon stripper provided by the present invention can limit the cutting depth of the sheath by the ring cutting shear assembly and the longitudinal cutting shear assembly by connecting and arranging elastic limiting components between the first ring cutting body, the second ring cutting body, the first longitudinal cutting body and the second longitudinal cutting body and the hinged support, thereby avoiding damage caused by contact between the blade or saw blade and the steel strand inside the sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the non-bonding and slow-bonding prestressed tendon stripper provided by the present invention;

[0030] Figure 2 It is a schematic diagram of the planar structure of the non-bonding and slow-bonding prestressed tendon stripper provided by the present invention;

[0031] Figure 3 It is a schematic diagram of the end structure of the cutting end of the non-bonding and slow-bonding prestressed tendon stripper provided by the present invention;

[0032] Figure 4 is along Figure 3 Structural diagram of the middle section line AA;

[0033] Figure 5 is along Figure 3 A schematic diagram of the structure of the middle section line BB;

[0034] Figure 6 It is a schematic diagram of the planar structure of the sheath positioning sleeve of the non-bonding and slow-bonding prestressed tendon stripper provided by the present invention;

[0035] Figure 7 The present invention provides a schematic diagram of the end structure of the sheath positioning sleeve of the non-bonding and slow-bonding prestressed tendon stripper.

[0036] Description of Figure Numbers:

[0037] 1. Circular shear assembly;

[0038] 11. The first circumcision body;

[0039] 111. First annular cutting blade;

[0040] 112. a first connecting portion;

[0041] 113. A first hinge portion;

[0042] 114. Grip;

[0043] 12. Second circumcision body;

[0044] 121, second circumcision cutter head;

[0045] 122. second connecting portion;

[0046] 123, second hinged portion;

[0047] 124, second grip portion;

[0048] 13. Cutting head seat;

[0049] 131. Circular cutting blade;

[0050] 2. Slitting shear assembly;

[0051] 21. First longitudinal section of the body;

[0052] 211, third connecting portion;

[0053] 212, third hinge part;

[0054] 213, third gripping portion;

[0055] 214, first longitudinal cutting blade;

[0056] 22. Second longitudinal section of the body;

[0057] 221, fourth connecting portion;

[0058] 222, fourth hinge portion;

[0059] 223, fourth gripping portion;

[0060] 224, second longitudinal cutting blade;

[0061] 23. Slitting blade;

[0062] 3. Articulated components;

[0063] 31. Articulated support;

[0064] 32. Hinge pin;

[0065] 33. hinged piece;

[0066] 34. Transition connecting rod;

[0067] 4. Sheath positioning sleeve;

[0068] 41. Base pipe;

[0069] 42. Claw;

[0070] 5. Limiting ring;

[0071] 6. Adjustment ring;

[0072] 7. Elastic limiting component;

[0073] 71. Limit rod;

[0074] 72. Spring;

[0075] 73. Base;

[0076] 8. Prestressed tendons. DETAILED DESCRIPTION

[0077] In order to have a clearer understanding of the technical solution, purpose and effect of the present invention, the specific implementation mode of the present invention is now described in conjunction with the accompanying drawings.

[0078] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the present invention provides a non-bonded, slow-bonded prestressed tendon peeling device, wherein the non-bonded, slow-bonded prestressed tendon peeling device comprises a ring cutting shear assembly 1 and a longitudinal cutting shear assembly 2 which are sleeved on each other, the axis of the length direction of the ring cutting shear assembly 1 coincides with the axis of the length direction of the longitudinal cutting shear assembly 2, the ring cutting shear assembly 1 is basically located outside the longitudinal cutting shear assembly 2, the ring cutting shear assembly 1 comprises a first ring cutting body 11 and a second ring cutting body 12 which are cross-hinged with each other in a scissors shape, and the longitudinal cutting shear assembly 2 comprises a first ring cutting body 11 and a second ring cutting body 12 which are cross-hinged with each other in a scissors shape The longitudinal cutting body 21 and the second longitudinal cutting body 22, and the first annular cutting body 11, the second annular cutting body 12, the first longitudinal cutting body 21 and the second longitudinal cutting body 22 are coaxially hinged by the same set of hinge components 3, that is, the first annular cutting body 11, the second annular cutting body 12, the first longitudinal cutting body 21 and the second longitudinal cutting body 22 are connected to each other along the same straight line by the same set of hinge components 3, and the first annular cutting body 11, the second annular cutting body 12, the first longitudinal cutting body 21 and the second longitudinal cutting body 22 respectively have a gripping end and a cutting end;

[0079] The first ring cutting body 11 and the second ring cutting body 12 are hinged to form a ring cutting shear assembly 1, and the cutting end of the first ring cutting body 11 and the cutting end of the second ring cutting body 12 can cooperate to cut the sheath of the prestressed tendon 8, and the first longitudinal cutting body 21 and the second longitudinal cutting body 22 are hinged to form a longitudinal cutting shear assembly 2, and the cutting end of the first longitudinal cutting body 21 and the cutting end of the second longitudinal cutting body 22 can cut the sheath of the prestressed tendon 8 longitudinally, and the holding end of the first ring cutting body 11, the holding end of the second ring cutting body 12, the holding end of the first longitudinal cutting body 21 and the holding end of the second longitudinal cutting body 22 are provided for manual operation by an operator. By adjusting the distance between the holding end of the first ring cutting body 11 and the holding end of the second ring cutting body 12, the degree of opening and closing between the cutting end of the first ring cutting body 11 and the cutting end of the second ring cutting body 12 can be adjusted, thereby adjusting the ring cutting depth of the sheath of the prestressed tendon 8 by the ring cutting shear assembly 1, and by adjusting the distance between the holding end of the first longitudinal cutting body 21 and the holding end of the second longitudinal cutting body 22, the degree of opening and closing between the cutting end of the first longitudinal cutting body 21 and the cutting end of the second longitudinal cutting body 22 can be adjusted, thereby adjusting the longitudinal cutting depth of the sheath of the prestressed tendon 8 by the longitudinal cutting shear assembly 2.

[0080] In the process of cutting the sheath of the prestressed tendon 8 by using the present invention, the sheath is cut in rings by operating the ring cutting shear assembly 1 and the sheath is cut in longitudinal directions by operating the longitudinal cutting shear assembly 2, wherein the position of the ring cutting of the sheath and the position of the longitudinal cutting of the sheath can be flexibly adjusted so that the cut sheath includes a small circular ring portion that has not been longitudinally cut and other longitudinally cut portions; it should be noted that the non-bonding and slow-bonding prestressed tendon stripper provided by the present invention can not only be used for cleaning the sheath of prestressed tendons, but also for cleaning other items with inner cores and sheaths such as cables, but the present invention is not limited to this.

[0081] In this way, the non-bonded and slow-bonded prestressed tendon stripper provided by the present invention can not only perform ring cutting or longitudinal cutting on the sheath alone, but also perform both ring cutting and longitudinal cutting on the sheath by setting the ring cutting shear component 1 and the longitudinal cutting shear component 2, so that only a small part of the cut sheath is in a complete circular ring shape and is still wrapped on the outside of the steel strand, while the other parts can no longer be tightly wrapped on the outside of the steel strand like the circular ring parts due to the longitudinal cutting, so that the friction resistance between the cut sheath and the steel strand can be effectively reduced, so that the cut sheath can be easily pulled out of the steel strand; at the same time, in the process of the cut sheath being pulled out of the steel strand, the longitudinal gap formed at the longitudinal cutting and the circular ring part that has not been longitudinally cut can scrape off the grease or slow-setting adhesive on the steel strand, thereby effectively cleaning the grease and slow-setting adhesive on the steel strand, reducing the direct contact of construction personnel with grease and slow-setting adhesive, thereby reducing the risk of allergies for construction personnel.

[0082] Furthermore, if Figure 1 to Figure 5As shown, the present invention provides a non-bonded, slow-bonded prestressed tendon peeling device, wherein the first ring cutting body 11 includes a first ring cutting head 111, a first connecting part 112, a first hinged part 113 and a first gripping part 114 connected in sequence; the second ring cutting body 12 includes a second ring cutting head 121, a second connecting part 122, a second hinged part 123 and a second gripping part 124 connected in sequence; the first longitudinal cutting body 21 includes a third connecting part 211, a third hinged part 212 and a third gripping part 213 connected in sequence, and the end of the third connecting part 211 away from the third hinged part 212 forms a first longitudinal cutting head 214; the second longitudinal cutting body 22 includes a fourth connecting part 221, a fourth hinged part 222 and a fourth gripping part 223 connected in sequence, and the end of the fourth connecting part 221 away from the fourth hinged part 222 forms a second longitudinal cutting head 224; the first hinged part 113, the second hinged part 123, the third hinged part 212 and the third gripping part 213 are connected in sequence. The first hinged portion 112 and the fourth hinged portion 222 are coaxially hinged by the same set of hinged components 3, the first connection portion 112, the second connection portion 122, the third connection portion 211 and the fourth connection portion 221 are all located on one side of the hinged component 3, and the first gripping portion 114, the second gripping portion 124, the third gripping portion 213 and the fourth gripping portion 223 are all located on the other side of the hinged component 3, wherein the first hinged portion 113, the second hinged portion 123, the third hinged portion 212 The fourth hinge part 222 is generally a frame-shaped structure, the fourth hinge part 222 is located at the innermost side, the third hinge part 212 is sleeved on the outside of the fourth hinge part 222, the second hinge part 123 is sleeved on the outside of the third hinge part 212 and the first hinge part 113 is sleeved on the outside of the second hinge part 123, the first hinge part 113, the second hinge part 123, the third hinge part 212 and the fourth hinge part 222 can rotate respectively with the hinge component 3 as the center.

[0083] Furthermore, if Figure 1As shown, the present invention provides a non-bonded and slow-bonded prestressed tendon stripper, wherein the first connecting part 112 includes two first connecting rods arranged in parallel and at intervals, one end of the two first connecting rods are connected to the first hinged part 113, and the other ends of the two first connecting rods are connected to the first circular cutting head 111; the second connecting part 122 includes two second connecting rods arranged in parallel and at intervals, one end of the two second connecting rods are connected to the second hinged part 123, and the other ends of the two second connecting rods are connected to the second circular cutting head 121; the third connecting part 211 includes a third connecting rod, one end of the third connecting rod is connected to the third hinged part 212, and the other end of the third connecting rod is connected to the third hinged part The first longitudinal cutting blade 214 is formed at one end of the fourth connecting portion 221; the fourth connecting portion 221 includes a fourth connecting rod, one end of the fourth connecting rod is connected to the fourth hinge portion 222, and the other end of the fourth connecting rod forms a second longitudinal cutting blade 224; during the rotation of the first hinge portion 113, the second hinge portion 123, the third hinge portion 212 and the fourth hinge portion 222 along the hinge member 3, the third connecting rod can be extended between the two first connecting rods, and the fourth connecting rod can be extended between the two second connecting rods, so as to ensure that the first hinge portion 113, the second hinge portion 123, the third hinge portion 212 and the fourth hinge portion 222 can rotate along the hinge member 3 respectively without interfering with each other;

[0084] Specifically, the first hinge part 113, the second hinge part 123, the third hinge part 212 and the fourth hinge part 222 all include two transition connecting rods 34 parallel to the hinge axis of the hinge component 3, one end of the two first connecting rods of the first connecting part 112 are connected to a transition connecting rod 34 of the first hinge part 113, one end of the first gripping part 114 is connected to another transition connecting rod 34 of the first hinge part 113, and part of the transition connecting rod 34 between the positions where the two first connecting rods are connected to the corresponding transition connecting rods 34 is removed so that the second connecting rod can pass through between the two first connecting rods, one end of the third connecting rod of the third connecting part 211 is connected to a transition connecting rod 34 of the third hinge part 212, and one end of the third gripping part 213 is connected to the third The hinge part 212 is connected to another transition connecting rod 34; it should be noted that the connection setting mode between the two second connecting rods of the second connecting part 122 and the second hinge part 123, and between the second gripping part 124 and the second hinge part 123 is the same as the connection setting mode between the two first connecting rods of the first connecting part 112 and the first hinge part 113, and between the first gripping part 114 and the first hinge part 113, and the connection setting mode between the fourth connecting rod of the fourth connecting part 221 and the fourth hinge part 222, and between the fourth gripping part 223 and the fourth hinge part 222 is the same as the connection setting mode between the third connecting rod of the third connecting part 211 and the third hinge part 212, and between the third gripping part 213 and the third hinge part 212, which will not be repeated here.

[0085] As a preference, Figure 1 to Figure 5As shown, the present invention provides a non-bonded, slow-bonded prestressed tendon stripper, wherein the first circular cutting head 111 and the second circular cutting head 121 both include a semicircular head seat 13, each head seat 13 is provided with a plurality of circular cutting blades 131 evenly spaced along its circumference, each circular cutting blade 131 is located in a plane perpendicular to the length direction of the present invention, the end of the third connecting portion 211 away from the third hinged portion 212 is connected to a longitudinal cutting blade 23 to form a first longitudinal cutting head 214, the end of the fourth connecting portion 221 away from the fourth hinged portion 222 is connected to a longitudinal cutting blade 23 to form a second longitudinal cutting head 224, and each longitudinal cutting blade 23 is parallel to the length direction of the present invention. The circular cutting blades 131 and the longitudinal cutting blades 23 are arranged in the direction and radial direction, wherein each circular cutting blade 131 and each longitudinal cutting blade 23 are provided with a strip hole, each circular cutting blade 131 is detachably fixed to the corresponding cutter head seat 13 through a fixing piece passing through the strip hole, and each longitudinal cutting blade 23 is detachably fixed to the end of the corresponding third connecting portion 211 or the end of the fourth connecting portion 221 through a fixing piece passing through the strip hole, and by adjusting the relative positions of each fixing piece and the strip hole on the corresponding circular cutting blade 131 and the strip hole on the longitudinal cutting blade 23, the protruding length of each circular cutting blade 131 on the corresponding cutter head seat 13 and the longitudinal cutting blade 23 on the corresponding third connecting portion 211 or the fourth connecting portion 221 can be adjusted;

[0086] Preferably, blade mounting grooves are provided on each cutter head seat 13, at the end of the third connecting portion 211 and at the end of the fourth connecting portion 221 corresponding to the positions of each circular cutting blade 131 and each longitudinal cutting blade 23, so as to facilitate accurate installation of each circular cutting blade 131 and each longitudinal cutting blade 23 at the corresponding positions.

[0087] As a preference, Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the non-bonded and slow-bonded prestressed tendon peeling device provided by the present invention, wherein the first hinge part 113, the second hinge part 123, the third hinge part 212 and the fourth hinge part 222 all include two parallel hinge pieces 33 arranged opposite to each other, the hinge member 3 includes a hinge support 31 and two hinge pins 32, a hinge piece 33 of the first hinge part 113, a hinge piece 33 of the second hinge part 123, a hinge piece 33 of the third hinge part 212 and the fourth hinge One hinge piece 33 of the first hinge part 222 is connected to one side surface of the hinge support 31 through a hinge pin 32, and another hinge piece 33 of the first hinge part 113, another hinge piece 33 of the second hinge part 123, another hinge piece 33 of the third hinge part 212 and another hinge piece 33 of the fourth hinge part 222 are connected to the other side surface of the hinge support 31 through another hinge pin 32; the two hinge pieces 33 and the two transition connecting rods 34 roughly form a frame structure;

[0088] The hinged support 31 is a tubular structure with two ends open and a hollow interior, one end of the hinged support 31 faces the direction of the cutting end of the first annular cutting body 11, the cutting end of the second annular cutting body 12, the cutting end of the first longitudinal cutting body 21 and the cutting end of the second longitudinal cutting body 22, and the other end of the hinged support 31 faces the direction of the holding end of the first annular cutting body 11, the holding end of the second annular cutting body 12, the holding end of the first longitudinal cutting body 21 and the holding end of the second longitudinal cutting body 22. The ends of the two hinge pins 32 connected to the hinge support 31 are buried in the side wall of the hinge support 31, that is, the ends of the two hinge pins 32 do not protrude from the inner wall of the hinge support 31. When the sheath of the prestressed tendon 8 is sheared, the prestressed tendon 8 can pass through the interior of the hinge support 31 without being restricted by the two hinge pins 32, that is, the length of the prestressed tendon 8 passing through the hinge support 31 is not restricted, thereby achieving the effect of unlimited sheath cleaning length.

[0089] As a preference, Figure 1 to Figure 7 As shown, the present invention provides a non-bonding and slow-bonding prestressed tendon peeling device, wherein, in the process of shearing the sheath of the prestressed tendon 8, in order to avoid displacement of the prestressed tendon 8 and cause the shearing position to move, the present invention is provided with a sheath positioning sleeve 4 in a detachable manner inside the hinged support 31, and the sheath positioning sleeve 4 includes a base tube 41 with openings at both ends and a hollow interior, and an end surface of one end of the base tube 41 has a plurality of claws 42 extending along the axial direction thereof, and each claw 42 is evenly spaced along the circumference of the base tube 41, and the base tube 41 and each claw 42 are arranged A portion of the positioning is inserted in the hinged support 31, and the end of each claw 42 extends toward the cutting end of the first annular cutting body 11, the cutting end of the second annular cutting body 12, the cutting end of the first longitudinal cutting body 21 and the cutting end of the second longitudinal cutting body 22. During use, the prestressed tendon 8 is clamped between the claws 42 to maintain positioning. At the same time, since the sheath positioning sleeve 4 and the hinged support 31 remain positioned, the positioning of the prestressed tendon 8 can be guaranteed, and displacement during shearing of the sheath can be effectively avoided.

[0090] As a preference, Figure 2 As shown, the present invention provides a non-bonding and slow-bonding prestressed tendon stripper, wherein one end of the base tube 41 away from each claw portion 42 protrudes to the outside of the hinged support 31, and the outer positioning sleeve of the part of the one end of the base tube 41 away from each claw portion 42 protruding to the outside of the hinged support 31 is provided with a limiting ring 5, wherein the limiting ring 5 can be kept in position by a screw arranged along the radial direction of the base tube 41, passing through the limiting ring 5 and inserted into the side wall of the base tube 41, and the limiting ring 5 can abut against the end face of the hinged support 31 that is closer to the end so as to limit the end of the base tube 41 away from the claw portions 42.

[0091] As a preference, Figure 2As shown, the present invention provides a non-bonding and slow-bonding prestressed tendon stripper, wherein an adjustment ring 6 is sleeved on the outer side of each claw 42 located outside the hinged support 31. When the prestressed tendon 8 is inserted between the claws 42, the clamping force of each claw 42 can be fine-tuned according to the change of the sleeve position of the adjustment ring 6 on the outer side of each claw 42, so that each claw 42 clamps the prestressed tendon, and the setting of the adjustment ring 6 can also prevent the claws 42 from expanding outward in a direction away from each other, so as to ensure that each claw 42 clamps the prestressed tendon 8.

[0092] As a preference, Figure 1 , Figure 2 and Figure 4 As shown, the present invention provides a non-bonded and slow-bonded prestressed tendon stripper, wherein an elastic limiting member 7 is connected between the first ring cutting body 11, the second ring cutting body 12, the first longitudinal cutting body 21 and the second longitudinal cutting body 22 and the hinged support 31 to limit the distance between the cutting end of the first ring cutting body 11 and the cutting end of the second ring cutting body 12, and the distance between the cutting end of the first longitudinal cutting body 21 and the cutting end of the second longitudinal cutting body 22, so as to avoid the situation where the ring cutting blade 131 and the longitudinal cutting blade 23 are damaged by contact with the steel strand due to the distance between the cutting end of the first ring cutting body 11 and the cutting end of the second ring cutting body 12, and the distance between the cutting end of the first longitudinal cutting body 21 and the cutting end of the second longitudinal cutting body 22 being too small.

[0093] The present invention requires the shear gap to be calibrated after the new assembly is completed. In the clamping state, the circular cutting blade 131 and the longitudinal cutting blade 23 are adjusted to leave a uniform small gap between them and the maximum outer diameter of the steel strand (the recommended gap is about 0.2 mm). In order to facilitate the replacement of the circular cutting blade 131 and the longitudinal cutting blade 23 in the present invention, the circular cutting blade 131 and the longitudinal cutting blade 23 use the same blade, but the setting direction is different.

[0094] Among them, as a preferred embodiment, Figure 1 , Figure 2 and Figure 4As shown, the elastic limiting member 7 may include a base 73, a spring 72 and a limiting rod 71, wherein the base 73 is correspondingly installed on the first annular cutting body 11, the second annular cutting body 12, the first longitudinal cutting body 21, and the second longitudinal cutting body 22, and the two ends of the spring 72 corresponding to each base 73 are respectively connected to the base 73 and the hinge support 31, and the spring 72 is specifically a compression spring. By setting the spring 72, the first annular cutting body 11, the second annular cutting body 12, the first longitudinal cutting body 21, and the second longitudinal cutting body 22 can be automatically in an open state without external force. At the same time, it can also prevent the first annular cutting body 11, the second annular cutting body 12, the first longitudinal cutting body 21, and the second longitudinal cutting body 22 from being excessively opened. One end of each limiting rod 71 is connected to the corresponding base 73. The other end of each limiting rod 71 faces the outer surface of the hinged support 31, and the limiting rod 71 can limit the extreme positions between the first annular cutting body 11 and the second annular cutting body 12, and between the first longitudinal cutting body 21 and the second longitudinal cutting body 22 in the clamping state, that is, when the other end of each limiting rod 71 moves to abut against the outer surface of the hinged support 31, its limiting function can be achieved. By adjusting the length of each limiting rod 71, the minimum distance between the cutting end of the first annular cutting body 11 and the cutting end of the second annular cutting body 12 and the minimum distance between the cutting end of the first longitudinal cutting body 21 and the cutting end of the second longitudinal cutting body 22 can be determined. It should be noted that the above-mentioned specific structure of the elastic limiting member 7 is only a preferred embodiment of the present invention, and the present invention is not limited to this.

[0095] The specific use process of the present invention is now described in conjunction with a specific embodiment. This embodiment takes the cleaning of the fixed end sheath and the tension end sheath of the 21.8 slow-bonding prestressed tendon as an example:

[0096] During the construction process, the fixed end sheath needs to be cleaned first. Since the sheath to be cleaned at the fixed end is shorter (15cm), the corresponding resistance when pulling it out is smaller. In order to prevent the sheath from moving along its axial direction during longitudinal cutting, longitudinal cutting can be performed first and then circular cutting. The specific operation process is as follows: Use a ruler to measure 15cm at one end of the 21.8 slow-bonding prestressed tendon that has been cut according to the design length (the fixed end of the 21.8 slow-bonding prestressed tendon generally cleans about 15cm of the sheath) and mark it; insert the 21.8 slow-bonding prestressed tendon into the sheath positioning sleeve 4, and move the longitudinal cutting blade 23 to a position about 2-3 transverse ribs away from the mark. The first longitudinal cutting body 21 and the second longitudinal cutting body 22 are held, and the tip of the longitudinal cutting blade 23 is inserted into the sheath of the 21.8 slow-bonding prestressed tendon. Then, the present invention is pulled out from the 21.8 slow-bonding prestressed tendon along the axial direction of the 21.8 slow-bonding prestressed tendon while the first longitudinal cutting body 21 and the second longitudinal cutting body 22 are held, so that the longitudinal cutting of the sheath is completed. The holding end of the first longitudinal cutting body 21 and the holding end of the second longitudinal cutting body 22 are released, and the first longitudinal cutting body 21 and the second longitudinal cutting body 22 are automatically opened and reset under the action of the spring 72 of the elastic limiting member 7.

[0097] Make the 21.8 slow-bonding prestressed tendon pass through the sheath positioning sleeve 4 of the present invention again, and align the cutting blade 131 with the marking line just made on the sheath, then hold the 21.8 slow-bonding prestressed tendon with one hand, and hold the holding end of the first cutting body 11 and the holding end of the second cutting body 12 with the other hand, so that the tip of the cutting blade 131 pierces the sheath of the 21.8 slow-bonding prestressed tendon, and use the wrist to drive the present invention to rotate more than 60° around the axis of the prestressed tendon to complete the sheath cutting, loosen the holding end of the first cutting body 11 and the holding end of the second cutting body 12, and the first cutting body 11 and the second cutting body 12 are automatically opened and reset under the action of the spring 72 of the elastic limiting member 7;

[0098] Next, the sheath that has been cut longitudinally and circumferentially is pulled out from the 21.8 slow-bonding prestressed tendons. In the process of pulling out the sheath, the uncut part of the sheath is used to scrape off the excess grease or slow-setting adhesive on the steel strand. At this point, the cleaning of the sheath at the fixed end of the 21.8 slow-bonding prestressed tendons is completed. After the sheath is cleaned, an extrusion anchor is installed at the fixed end and the construction is continued according to the prestressing construction requirements.

[0099] Then clean the sheath at the tensioning end. Since the sheath to be cleaned at the tensioning end is relatively long (about 80 cm), the corresponding resistance when pulling it out is relatively large. There is basically no need to worry about the sheath moving along its axial direction during longitudinal cutting, so it can be cut in circles first and then in longitudinal cutting. The specific operation process is as follows: when the prestressed tendons cast in the concrete can be tensioned, insert the 21.8 slow-bonding prestressed tendon peeler into the sheath positioning sleeve 4 from the tensioning end, and extend the cutting end of the present invention into the cavity mold, with its front end close to the pressure plate (the prestressed tendons exposed on the outside of the pressure plate are about 8 cm long). 0cm); hold the holding end of the first ring cutting body 11 and the holding end of the second ring cutting body 12, so that the tip of the ring cutting blade 131 pierces the sheath of the 21.8 slow-bonding prestressed tendon, and then use the wrist to drive the present invention to rotate more than 60° around the axis of the prestressed tendon to complete the ring cutting of the sheath, loosen the holding end of the first ring cutting body 11 and the holding end of the second ring cutting body 12, and the ring cutting shears of the first ring cutting body 11 and the second ring cutting body 12 are automatically opened and reset under the action of the spring 72 of the elastic limiting member 7;

[0100] Next, the longitudinal cutting operation of the tensioning end sheath is performed, the longitudinal cutting blade 23 is moved to a position about 2-3 transverse ribs away from the sheath ring cutting incision, the holding end of the first ring cutting body 11 and the holding end of the second ring cutting body 12 are held, and the tip of the longitudinal cutting blade 23 is inserted into the sheath of the 21.8 slow-bonding prestressed tendon, and then the present invention is pulled out from the 21.8 slow-bonding prestressed tendon while the holding end of the first ring cutting body 11 and the holding end of the second ring cutting body 12 are held to complete the longitudinal cutting of the sheath;

[0101] Finally, the sheath that has been cut circularly and longitudinally is pulled out from the 21.8 slow-bonding prestressed tendons. In the process of pulling out the sheath, the part of the sheath that has not been cut longitudinally is used to scrape off the excess slow-setting adhesive on the steel strand. At this point, the cleaning of the sheath at the tensioning end of the 21.8 slow-bonding prestressed tendons is completed.

[0102] The method for cleaning the unbonded prestressed tendon sheath is similar to the above method and will not be described in detail here. When the sheath is cleaned by the present invention, whether to cut longitudinally or circumferentially first can be flexibly determined according to the situation of the sheath to be cleaned. Those skilled in the art can adjust the operation method of sheath cleaning according to actual working conditions and do not need to be limited by the operation ideas of this embodiment.

[0103] Compared with the prior art, the advantages of the present invention are as follows:

[0104] 1. The non-bonded and slow-bonded prestressed tendon stripper provided by the present invention can perform both ring cutting and longitudinal cutting of the sheath by arranging a ring cutting shear assembly and a longitudinal cutting shear assembly, so that only a small part of the cut sheath is in a complete circular ring shape and is still wrapped around the outside of the steel strand, while the other parts can no longer be tightly wrapped around the outside of the steel strand like the circular ring parts due to being longitudinally cut, thereby effectively reducing the friction resistance between the cut sheath and the steel strand, making it easy for the cut sheath to be pulled off the steel strand; at the same time, in the process of the cut sheath being pulled off the steel strand, the longitudinal gap formed at the longitudinal cutting position and the circular ring part that has not been longitudinally cut can scrape off the grease or slow-setting adhesive on the steel strand, thereby effectively cleaning the grease and slow-setting adhesive on the steel strand.

[0105] 2. The present invention provides a non-bonding and slow-bonding prestressed tendon stripper, in which the hinged support of the hinged component is not penetrated by two hinged pins, and the setting of the two hinged pins will not cause any restriction on the axial penetration length of the prestressed tendon inside the hinged support, thereby achieving the effect of unlimited sheath cleaning length.

[0106] 3. The non-bonding and slow-bonding prestressed tendon stripper provided by the present invention can limit the cutting depth of the sheath by the ring cutting shear assembly and the longitudinal cutting shear assembly by connecting and arranging elastic limiting components between the first ring cutting body, the second ring cutting body, the first longitudinal cutting body and the second longitudinal cutting body and the hinged support, thereby avoiding damage caused by contact between the blade or saw blade and the steel strand inside the sheath.

[0107] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by a person of ordinary skill in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A non-bonding and slow-bonding prestressed tendon stripper, characterized in that: The non-bonded and slow-bonded prestressed tendon stripper comprises a ring-cutting shear assembly and a longitudinal cutting shear assembly which are sleeved on each other, the ring-cutting shear assembly comprises a first ring-cutting body and a second ring-cutting body which are hinged to each other, the longitudinal cutting shear assembly comprises a first longitudinal cutting body and a second longitudinal cutting body which are hinged to each other, and the first ring-cutting body, the second ring-cutting body, the first longitudinal cutting body and the second longitudinal cutting body are coaxially hinged through the same set of hinged components, and the first ring-cutting body, the second ring-cutting body, the first longitudinal cutting body and the second longitudinal cutting body respectively have a gripping end and a cutting end; The cutting end of the first annular cutting body and the cutting end of the second annular cutting body cooperate to perform annular cutting on the sheath of the prestressed tendon, and the cutting end of the first longitudinal cutting body and the cutting end of the second longitudinal cutting body can perform longitudinal cutting on the sheath of the prestressed tendon. By adjusting the distance between the holding end of the first annular cutting body and the holding end of the second annular cutting body, the degree of opening and closing between the cutting end of the first annular cutting body and the cutting end of the second annular cutting body can be adjusted, and by adjusting the distance between the holding end of the first longitudinal cutting body and the holding end of the second longitudinal cutting body, the degree of opening and closing between the cutting end of the first longitudinal cutting body and the cutting end of the second longitudinal cutting body can be adjusted; The first annular cutting body comprises a first annular cutting head, a first connecting part, a first hinged part and a first gripping part connected in sequence; the second annular cutting body comprises a second annular cutting head, a second connecting part, a second hinged part and a second gripping part connected in sequence; the first longitudinal cutting body comprises a third connecting part, a third hinged part and a third gripping part connected in sequence, and the end of the third connecting part away from the third hinged part forms the first longitudinal cutting head; the second longitudinal cutting body comprises a fourth connecting part, a fourth hinged part and a fourth gripping part connected in sequence, and the end of the fourth connecting part away from the fourth hinged part forms the second longitudinal cutting head; the first hinged part, the second hinged part, the third hinged part and the fourth hinged part are coaxially hinged by the same set of hinged components; The first connecting part includes two first connecting rods arranged in parallel and at intervals, one end of the two first connecting rods are connected to the first hinged part, and the other end of the two first connecting rods are connected to the first circular cutting blade head; the second connecting part includes two second connecting rods arranged in parallel and at intervals, one end of the two second connecting rods are connected to the second hinged part, and the other end of the two second connecting rods are connected to the second circular cutting blade head; the third connecting part includes a third connecting rod, one end of the third connecting rod is connected to the third hinged part, and the other end of the third connecting rod forms the first longitudinal cutting blade head; the fourth connecting part includes a fourth connecting rod, one end of the fourth connecting rod is connected to the fourth hinged part, and the other end of the fourth connecting rod forms the second longitudinal cutting blade head; during the rotation of the first hinged part, the second hinged part, the third hinged part and the fourth hinged part along the hinged component, the third connecting rod can extend between the two first connecting rods, and the fourth connecting rod can extend between the two second connecting rods; The first circular cutting cutter head and the second circular cutting cutter head both comprise a semicircular cutter head seat, each of the cutter head seats is provided with a plurality of circular cutting blades evenly spaced along the circumference thereof, the end of the third connecting portion away from the third hinged portion is connected to a longitudinal cutting blade to form the first longitudinal cutting cutter head, and the end of the fourth connecting portion away from the fourth hinged portion is connected to a longitudinal cutting blade to form the second longitudinal cutting cutter head; The first hinge part, the second hinge part, the third hinge part and the fourth hinge part each include two parallel and oppositely arranged hinge plates, the hinge component includes a hinge support and two hinge pins, one hinge plate of the first hinge part, one hinge plate of the second hinge part, one hinge plate of the third hinge part and one hinge plate of the fourth hinge part are connected to one side surface of the hinge support through one hinge pin, and the other hinge plate of the first hinge part, the other hinge plate of the second hinge part, the other hinge plate of the third hinge part and the other hinge plate of the fourth hinge part are connected to the other side surface of the hinge support through another hinge pin.

2. The non-bonding and slow-bonding prestressed tendon stripper according to claim 1 is characterized in that: The articulated support is a tubular structure with both ends open and a hollow interior, one end of the articulated support faces the direction of the cutting end of the first annular cutting body, the cutting end of the second annular cutting body, the cutting end of the first longitudinal cutting body and the cutting end of the second longitudinal cutting body, the other end of the articulated support faces the direction of the holding end of the first annular cutting body, the holding end of the second annular cutting body, the holding end of the first longitudinal cutting body and the holding end of the second longitudinal cutting body, and the ends of the two articulated pins connected to the articulated support are buried inside the side wall of the articulated support.

3. The non-bonding and slow-bonding prestressed tendon stripper according to claim 2 is characterized in that: A sheath positioning sleeve is detachably positioned and inserted inside the articulated support, and the sheath positioning sleeve includes a base tube with openings at both ends and a hollow interior, and an end face of the base tube has a plurality of claws extending along its axial direction, and each of the claws is evenly spaced along the circumference of the base tube, and a part of the base tube and each of the claws is positioned and inserted in the articulated support, and an end portion of each of the claws extends toward the direction where the cutting end of the first annular cutting body, the cutting end of the second annular cutting body, the cutting end of the first longitudinal cutting body and the cutting end of the second longitudinal cutting body are located.

4. The non-bonding and slow-bonding prestressed tendon stripper according to claim 3 is characterized in that: One end of the base tube away from each claw protrudes to the outside of the hinged support, and the outer positioning sleeve of the part of the end of the base tube away from each claw protrudes to the outside of the hinged support is provided with a limiting ring, and the limiting ring can abut against the end face of the hinged support that is closer to the end.

5. The non-bonding and slow-bonding prestressed tendon stripper according to claim 3 is characterized in that: An adjusting ring is sleeved on the outer side of each claw portion located outside the hinged support.

6. The non-bonding and slow-bonding prestressed tendon stripper according to claim 2 is characterized in that: An elastic limiting component is connected between the first annular cutting body, the second annular cutting body, the first longitudinal cutting body, the second longitudinal cutting body and the hinged support.

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