Pipe expanding tool used for installing elastic crimping assembly for clamping channel pipe in sleeving mode

Abstract

The utility model discloses a pipe expanding tool for installing an elastic crimping assembly for a pincer channel pipe in a sleeved mode, the pipe expanding tool comprises an expanding seat and a core rod, the expanding seat comprises a straight pipe section, the left end of the straight pipe section is provided with a conical part capable of expanding, and a plurality of arc-shaped pieces are annularly arranged on the small-diameter end edge, facing the left side, of the conical part at intervals. The arc-shaped pieces define a penetrating hole used for being connected with an upper bent part of the pincer channel pipe in a penetrating mode, and the outer side faces of the arc-shaped pieces define an annular sleeving face used for being connected with the elastic pressing assembly in a sleeving mode. A conical head with the small-diameter end facing the left side is arranged at the left end of the core rod, a through hole used for penetrating through the bent part on the clamp channel pipe is formed in the core rod, and the conical head is inserted into a cavity of the conical part on the expansion seat from right to left. According to the pipe expanding tool, the installation difficulty is simplified, the overall operation steps are simple, the requirement for the technical level of operators is low, the installation precision and the installation efficiency of the elastic pressing assembly on the clamp channel pipe can be greatly improved, and the abrasion probability of the elastic pressing assembly in the installation process is effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of medical device processing tool technology, specifically relating to a tube expansion tool for installing an elastic crimping component for a tube sleeve. Background Technology

[0002] The forceps cannula of a flexible medical endoscope is a key component of the endoscope; it is a small, long, open channel. Medical instruments are inserted through the forceps cannula of the flexible medical endoscope into the body cavity to reach the lesion site, and to perform surgical procedures such as biopsies, removal of foreign bodies, and polyps.

[0003] Currently, clamp-type conduits typically have a bend at the front end of the main body to meet the bending requirements of the conduit's tip. For example... Figures 1-3 The illustrated clamping tube includes a main body 1. The right outer peripheral side of the main body 1 has a spiral groove 1-1 distributed along its axial length and an annular groove 1-2 adjacent to both ends of the spiral groove 1-1. A spring 3 is embedded and fixed inside the spiral groove 1-1 by adhesive. Both ends of the spring 3 are respectively glued and wrapped around the annular groove 1-2 adjacent to both ends of the spiral groove 1-1 by adhesive. After the adhesive cures, it forms an adhesive layer 4. The spiral groove 1-1, the two annular grooves 1-2, and the spring 3 constitute a bent portion 2 located at the right end of the main body 1. To prevent the spring 3 from warping and protruding due to frequent bending of the bent portion 2 during use, elastic clamping components 5 are respectively embedded in the annular grooves 1-2 located at both ends of the spiral groove 1-1, and are tensioned and fitted onto the outer peripheral side of the spring 3 ends. The elastic clamping components 5 can be rubber rings, thin-walled silicone tubes, etc. In the assembly and processing of this pipe, the elastic clamping component 5 is generally expanded by hand and then directly fitted into the annular grooves 1-2 at both ends of the curved part 2 on the main body 1, or the elastic clamping component 5 is expanded by the head of needle-nose pliers and then fitted into the annular grooves 1-2 at both ends of the curved part 2 on the main body 1. The problems with these two methods of fitting the elastic clamping component 5 into the annular grooves 1-2 on the main body 1 are: (1) It requires a high level of skill from the operator, is difficult to assemble, and is difficult to control the installation position accuracy of the elastic clamping component at the right end of the main body. The installation position of the elastic clamping component needs to be constantly adjusted during the fitting process, resulting in low overall installation efficiency and seriously restricting the assembly and processing progress of the pipe; (2) When using needle-nose pliers to expand the elastic clamping component, it is easy to break the elastic clamping component or the head of the pliers can easily cause wear on the outer circumference of the main body during fitting, thus making it difficult to guarantee the overall quality level of the assembled pipe. Therefore, this utility model proposes a tube expansion tool for installing an elastic crimping component on a pipe fitting, in order to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a tube expansion tool for installing an elastic compression assembly on a tube fitting. When installing the elastic compression assembly into the annular groove on the tube fitting, the elastic compression assembly is loosely fitted onto the annular fitting surface on the outer periphery of several arc-shaped pieces. Then, the conical head of the mandrel is moved a certain distance into the cavity of the conical part so that the outer diameter of the through hole and the outer diameter of the elastic compression assembly are larger than the outer diameter of the bent part on the tube fitting. Finally, the bent part on the tube fitting is sequentially inserted into the through hole on the expansion seat and the through hole on the mandrel, with the elastic compression assembly adjacent to the right side of an annular groove. The mandrel is then retracted a certain distance to the right so that the through hole and the... The outer diameter of the elastic clamping component is slightly larger than the outer diameter of the curved part on the pliers tube. Simply push the elastic clamping component to the left into the corresponding annular groove. Then, remove the tooling and install the elastic clamping component into another annular groove on the pliers tube. Compared with the traditional manual installation or installation using needle-nose pliers, this simplifies the installation process. The overall operation is simple and requires less skill from the operator, which helps to significantly improve the installation accuracy and efficiency of the elastic clamping component in the annular groove on the pliers tube. At the same time, compared with the installation method using needle-nose pliers, it effectively reduces the chance of wear on the elastic clamping component, which helps to improve the safety of installing the elastic clamping component on the pliers tube.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a tube expansion tool for installing an elastic compression assembly on a tube fitting, including an expansion seat and a mandrel. The expansion seat includes a straight tube section, the left end of which has an expandable tapered portion, and a plurality of arc-shaped pieces are circumferentially spaced on the small-diameter end edge of the tapered portion facing the left. The plurality of arc-shaped pieces surround to form a through hole for passing through the bend in the tube fitting, and the outer surfaces of the plurality of arc-shaped pieces surround to form an annular fitting surface for fitting the elastic compression assembly. The mandrel has a tapered head with its small-diameter end facing the left at its left end, and the mandrel has a through hole inside for passing through the bend in the tube fitting. The tapered head is inserted into the cavity of the tapered portion on the expansion seat from right to left.

[0006] This utility model discloses a tube expansion tool for installing an elastic compression assembly on a tube fitting. When installing the elastic compression assembly into the annular groove on the tube fitting, the elastic compression assembly is loosely fitted onto the annular fitting surface on the outer periphery of several arc-shaped pieces. Then, the conical head of the mandrel is moved a certain distance into the cavity of the conical part, so that the outer diameter of the through hole and the elastic compression assembly is larger than the outer diameter of the bent portion on the tube fitting. Finally, the bent portion on the tube fitting is sequentially inserted into the through hole on the expansion seat and the through hole on the mandrel, with the elastic compression assembly adjacent to the right side of an annular groove. The mandrel is then retracted a certain distance to the right, so that the outer diameter of the through hole and the elastic compression assembly is slightly... The outer diameter of the bend on the pliers tube is larger than the outer diameter of the bend. Push the elastic clamping component to the left into the corresponding annular groove. Then remove the tool and install the elastic clamping component into the other annular groove on the pliers tube. Compared with the traditional manual installation or installation using needle-nose pliers, this simplifies the installation process. The overall operation is simple and requires less skill from the operator. This helps to significantly improve the installation accuracy and efficiency of the elastic clamping component in the annular groove on the pliers tube. At the same time, compared with the installation method using needle-nose pliers, it effectively reduces the chance of wear on the elastic clamping component, which helps to improve the safety of installing the elastic clamping component on the pliers tube.

[0007] A preferred technical solution is that the left end edge of the straight pipe section is provided with a plurality of obliquely tapering legs that gradually narrow from right to left. A plurality of arc-shaped plates are fixedly attached to the left ends of the obliquely tapered legs, and the obliquely tapered legs together form the conical portion. The conical portion has a simple structural design and good expansion resilience, thus ensuring that the expansion fixture of this invention has a good expansion effect on the elastic clamping assembly.

[0008] A further preferred technical solution is that the left end of the inclined support leg is provided with a positioning eave extending outward, and the positioning eaves on several of the inclined support legs enclose a positioning surface for positioning the elastic clamping component. When the elastic clamping component is sleeved and installed on the annular sleeve surface formed by the outer surfaces of several arc-shaped pieces, the positioning eaves provide a positioning effect on the right end face of the elastic clamping component, which helps the operator quickly determine whether the elastic clamping component is installed in place on the annular sleeve surface.

[0009] A preferred technical solution further includes an internal thread structure on the inner circumferential side of the straight pipe section, and an annular truncated cone extending outward from the center of the mandrel. The outer circumferential side of the annular truncated cone has an external thread structure. The annular truncated cone is located inside the straight pipe section, and the two are screwed together by the internal and external thread structures. The expansion seat and mandrel are screwed together by the internal thread structure on the inner circumferential side of the straight pipe section and the external thread structure on the outer circumferential side of the annular truncated cone on the mandrel. This improves the stability of the expansion seat and mandrel during engagement and facilitates temporary locking at any engagement position, effectively reducing the difficulty of gripping for the operator and improving the ease of operation of this expansion fixture.

[0010] A further preferred technical solution is that both the internal and external thread structures are three-start thread structures. The three-start thread structure has a fast travel speed, which helps the expansion seat and mandrel to be quickly adjusted and assembled into place.

[0011] A further preferred technical solution is that both ends of the through hole are provided with a tapered opening structure with a large diameter end facing outward. This helps to improve the smoothness of the passage of the curved part on the clamping tube through the expansion fixture of this utility model.

[0012] A further preferred technical solution is that both the outer peripheral surface of the straight pipe section and the outer peripheral surface of the right end of the mandrel are provided with anti-slip textured structures. This helps to improve the anti-slip effect and safety of holding the expansion seat and mandrel.

[0013] A further preferred technical solution is that both the expansion seat and the mandrel are made of stainless steel. Stainless steel has good corrosion resistance and smoothness, ensuring that when the expansion fixture of this invention is used to install the elastic clamping component onto the bent part of the clamping tube, it will not cause scratches to the elastic component or the clamping tube.

[0014] The advantages and beneficial effects of this utility model are as follows:

[0015] 1. This utility model discloses a tube expansion tool for installing an elastic crimping component on a tube fitting. When installing the elastic crimping component into the annular groove on the tube fitting, the elastic crimping component is loosely fitted onto the annular fitting surface on the outer periphery of several arc-shaped pieces. Then, the conical head of the mandrel is moved a certain distance into the cavity of the conical part so that the outer diameter of the through hole and the outer diameter of the elastic crimping component are larger than the outer diameter of the bent portion on the tube fitting. Finally, the bent portion on the tube fitting is sequentially inserted into the through hole on the expansion seat and the through hole on the mandrel, with the elastic crimping component adjacent to the right side of an annular groove. The mandrel is then retracted a certain distance to the right, so that the outer diameter of the through hole and the outer diameter of the elastic crimping component... Slightly larger than the outer diameter of the curved section on the pliers tube, push the elastic clamping component to the left into the corresponding annular groove. Then remove the tooling and install the elastic clamping component into another annular groove on the pliers tube. Compared to traditional manual installation or installation using needle-nose pliers, this simplifies the installation process, makes the overall operation simple, and requires less skill from the operator. It helps to significantly improve the installation accuracy and efficiency of the elastic clamping component in the annular groove on the pliers tube. At the same time, compared to the installation method with needle-nose pliers, it effectively reduces the chance of wear on the elastic clamping component, which helps to improve the safety of installing the elastic clamping component on the pliers tube.

[0016] 2. The left end edge of the straight pipe section is provided with several oblique support legs that gradually taper from right to left at intervals. Several arc-shaped pieces are fixed to the left ends of the oblique support legs one by one, and the oblique support legs enclose to form the conical part. The conical part has a simple structural design and good expansion resilience, thereby ensuring that the expansion fixture of this utility model has a good expansion effect on the elastic clamping assembly.

[0017] 3. The left end of the inclined support leg is also provided with a positioning eave extending outward. The positioning eaves on several of the inclined support legs enclose a positioning surface for positioning the elastic clamping component. When the elastic clamping component is sleeved and installed on the annular sleeve surface formed by the outer surfaces of several arc-shaped pieces, the positioning eaves provide a positioning effect on the right end face of the elastic clamping component, helping the operator to quickly determine whether the elastic clamping component is installed in place on the annular sleeve surface.

[0018] 4. The expansion seat and the mandrel are threaded together by the internal thread structure set on the inner side of the straight pipe section and the external thread structure set on the outer circumferential side of the annular frustum on the mandrel. This improves the stability of the expansion seat and the mandrel when they are engaged and helps to achieve temporary locking at any engagement position. This effectively reduces the difficulty of gripping the mandrel for the operator and helps to improve the ease of operation of the expansion fixture of this utility model. Attached Figure Description

[0019] Figure 1This is a longitudinal sectional view of a clamping pipe along the axial centerline direction in the background art;

[0020] Figure 2 yes Figure 1 A magnified view of a section at point H in the middle;

[0021] Figure 3 yes Figure 1 A magnified view of a section at point S in the middle;

[0022] Figure 4 This is a longitudinal sectional view along the axial centerline direction of an expansion tool for installing an elastic crimping assembly on a pipe fitting according to the present invention.

[0023] Figure 5 It is a longitudinal sectional view of the expansion seat along the axial centerline direction;

[0024] Figure 6 This is the left view of the expansion joint;

[0025] Figure 7 It is a longitudinal sectional view of the mandrel along the axial centerline.

[0026] Figure 8 This is a diagram showing the usage state of an expansion tool for installing an elastic crimping assembly on a pipe fitting according to this utility model.

[0027] Figure 9 yes Figure 8 A magnified view of the area at point W in the middle.

[0028] In the diagram: 1. Main pipe; 2. Bend; 3. Spring; 4. Adhesive layer; 5. Elastic clamping assembly; 6. Expansion seat; 7. Mandrel; 1-1. Spiral groove; 1-2. Annular groove; 6-1. Straight pipe section; 6-1a. Internal thread structure; 6-2. Angled support leg; 6-3. Arc-shaped plate; 6-4. Through hole; 6-5. Positioning eaves; 7-1. Conical head; 7-2. Annular truncated cone; 7-2a. External thread structure; 7-3. Through hole; 7-4. Conical opening structure. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0030] Example

[0031] like Figures 4-7As shown, this utility model is a tube expansion tool for installing an elastic crimping assembly on a tube fitting. It includes an expansion seat 6 and a mandrel 7. The expansion seat 6 includes a straight tube section 6-1. The left end of the straight tube section 6-1 has an expandable tapered portion. Several arc-shaped pieces 6-3 are circumferentially spaced on the small-diameter end edge of the tapered portion facing the left. The arc-shaped pieces 6-3 surround to form a through hole 6-4 for inserting the bent portion 2 on the tube fitting. The outer surfaces of the arc-shaped pieces 6-3 surround to form an annular fitting surface for fitting the elastic crimping assembly 5. The left end of the mandrel 7 has a tapered head 7-1 with the small-diameter end facing the left. The mandrel 7 has a through hole 7-3 inside for inserting the bent portion 2 on the tube fitting. The tapered head 7-1 is inserted into the cavity of the tapered portion on the expansion seat 6 from right to left.

[0032] Preferably, the left end edge of the straight pipe section 6-1 is provided with a plurality of oblique support legs 6-2 that gradually taper from right to left, and a plurality of arc-shaped pieces 6-3 are fixedly fixed to the left ends of the plurality of oblique support legs 6-2 in a corresponding manner, and the plurality of oblique support legs 6-2 surround to form the conical part.

[0033] More preferably, the left end of the inclined support leg 6-2 is provided with a positioning eave 6-5 extending outward, and the positioning eaves 6-5 located on several of the inclined support legs 6-2 surround to form a positioning surface for positioning the elastic pressing component 5.

[0034] Preferably, the inner circumferential side of the straight pipe section 6-1 is provided with an internal thread structure 6-1a, the middle part of the mandrel 7 is provided with an annular frustum 7-2 extending outward, the outer circumferential side of the annular frustum 7-2 is provided with an external thread structure 7-2a, the annular frustum 7-2 is located inside the straight pipe section 6-1, and the two are screwed together by the internal thread structure 6-1a and the external thread structure 7-2a.

[0035] Furthermore, preferably, both the internal thread structure 6-1a and the external thread structure 7-2a are three-start thread structures.

[0036] In a further preferred embodiment, both ends of the through hole 7-3 are provided with a tapered opening structure 7-4 with the large-diameter end facing outward.

[0037] Furthermore, the outer peripheral side of the straight pipe section 6-1 and the outer peripheral side of the right end of the mandrel 7 are both provided with anti-slip textured structures.

[0038] Furthermore, preferably, both the expansion seat 6 and the mandrel 7 are made of stainless steel.

[0039] The working principle of this utility model is as follows: A tube expansion tool for installing an elastic crimping assembly on a pipe fitting.

[0040] like Figures 8-9 As shown, in the initial state, the conical portion formed by several inclined legs 6-2 and the several arc-shaped pieces 6-3 are in a compressed state. In use, the elastic pressing assembly 5 is loosely fitted onto the annular sleeve surface formed by the outer surfaces of the several arc-shaped pieces 6-3 (marked as state A). Then, the mandrel 7 is pushed to the left to expand the conical portion formed by several inclined legs 6-2 and the several arc-shaped pieces 6-3 by the conical head 7-1, so that the inner diameter of the through hole 6-4 and the elastic pressing assembly 5 is larger than the outer diameter of the bent part 2 on the clamp tube (marked as state B). Then, the bent part 2 of the clamp tube is inserted into the through hole 7-3 of the mandrel 7 on the expansion tool of this utility model. The elastic clamping component 5, which is fitted onto the annular sleeve surface, is located adjacent to the right side of an annular groove 1-2. The mandrel 7 is moved slightly to the right to reduce the inner diameter of the through hole 6-4 and the elastic clamping component 5 to be slightly larger than the outer diameter of the bent part 2 of the pliers tube. The elastic clamping component 5 is pushed to the left into the corresponding annular groove 1-2. Then, the mandrel 7 is pushed to the left to expand the conical head 7-1 and several arc-shaped pieces 6-3 until the inner diameter of the through hole 6-4 is larger than the outer diameter of the bent part 2 on the pliers tube. The expansion fixture of this utility model is removed and the elastic clamping component 5 is fitted and installed on the next annular groove 1-2.

[0041] This utility model discloses a tube expansion tool for installing an elastic compression assembly on a tube fitting. When installing the elastic compression assembly into the annular groove on the tube fitting, the elastic compression assembly is loosely fitted onto the annular fitting surface on the outer periphery of several arc-shaped pieces. Then, the conical head of the mandrel is moved a certain distance into the cavity of the conical part, so that the outer diameter of the through hole and the elastic compression assembly is larger than the outer diameter of the bent portion on the tube fitting. Finally, the bent portion on the tube fitting is sequentially inserted into the through hole on the expansion seat and the through hole on the mandrel, with the elastic compression assembly adjacent to the right side of an annular groove. The mandrel is then retracted a certain distance to the right, so that the outer diameter of the through hole and the elastic compression assembly is slightly... The outer diameter of the bend on the pliers tube is larger than the outer diameter of the bend. Push the elastic clamping component to the left into the corresponding annular groove. Then remove the tool and install the elastic clamping component into the other annular groove on the pliers tube. Compared with the traditional manual installation or installation using needle-nose pliers, this simplifies the installation process. The overall operation is simple and requires less skill from the operator. This helps to significantly improve the installation accuracy and efficiency of the elastic clamping component in the annular groove on the pliers tube. At the same time, compared with the installation method using needle-nose pliers, it effectively reduces the chance of wear on the elastic clamping component, which helps to improve the safety of installing the elastic clamping component on the pliers tube.

[0042] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tube expansion tool for installing a resilient crimping assembly on a pipe fitting, characterized in that, The device includes an expansion seat (6) and a mandrel (7). The expansion seat (6) includes a straight tube section (6-1). The left end of the straight tube section (6-1) has an expandable conical part, and a plurality of arc-shaped pieces (6-3) are arranged circumferentially on the small-diameter end edge of the conical part facing the left. The plurality of arc-shaped pieces (6-3) surround to form a through hole (6-4) for passing through the bent part (2) on the clamping tube. The outer surfaces of the plurality of arc-shaped pieces (6-3) surround to form an annular fitting surface for fitting the elastic clamping assembly (5). The left end of the mandrel (7) has a conical head (7-1) with the small-diameter end facing the left. The mandrel (7) has a through hole (7-3) inside for passing through the bent part (2) on the clamping tube. The conical head (7-1) is inserted into the cavity of the conical part on the expansion seat (6) from right to left.

2. The tube expansion tool for installing an elastic crimping assembly on a pipe sleeve as described in claim 1, characterized in that, The straight pipe section (6-1) is provided with a number of oblique support legs (6-2) that gradually taper from right to left on the left end edge. A number of arc-shaped pieces (6-3) are fixed to the left end of the oblique support legs (6-2) in a corresponding manner. The oblique support legs (6-2) enclose the conical part.

3. The tube expansion tool for installing an elastic crimping assembly on a pipe sleeve as described in claim 2, characterized in that, The left end of the inclined support leg (6-2) is also provided with a positioning eave (6-5) extending outward. The positioning eaves (6-5) on several of the inclined support legs (6-2) surround and form a positioning surface for positioning the elastic clamping assembly (5).

4. The tube expansion tool for installing an elastic crimping assembly on a pipe sleeve as described in claim 1, characterized in that, The inner circumferential side of the straight pipe section (6-1) is provided with an internal thread structure (6-1a), and the middle part of the mandrel (7) is provided with an annular frustum (7-2) extending outward. The outer circumferential side of the annular frustum (7-2) is provided with an external thread structure (7-2a). The annular frustum (7-2) is located inside the straight pipe section (6-1), and the two are screwed together by the internal thread structure (6-1a) and the external thread structure (7-2a).

5. The tube expansion tool for installing an elastic crimping assembly on a pipe sleeve as described in claim 4, characterized in that, Both the internal thread structure (6-1a) and the external thread structure (7-2a) are three-start thread structures.

6. The tube expansion tool for installing an elastic crimping assembly on a pipe sleeve as described in any one of claims 1 to 5, characterized in that, Both ends of the through hole (7-3) are provided with a tapered opening structure (7-4) with the large-diameter end facing outward.

7. The tube expansion tool for installing an elastic crimping assembly on a pipe sleeve as described in claim 6, characterized in that, The outer peripheral side of the straight pipe section (6-1) and the outer peripheral side of the right end of the mandrel (7) are both provided with anti-slip textured structures.

8. The tube expansion tool for installing an elastic crimping assembly on a pipe sleeve as described in claim 7, characterized in that, The expansion seat (6) and the mandrel (7) are both made of stainless steel.

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