Catheter sealing performance detection device

Abstract

The utility model discloses a conduit sealing performance detection device, which comprises a left shell, a first spring, a right shell, a handle, a piston seat, a second spring, a third spring, a piston, a protection ring, a sealing gasket, an inner conical ring, a support ring and a split type chuck, and the split type chuck is axially limited under the action of the end face of the left shell and the conical surface of the inner conical ring; the piston transmits acting force to the inner conical ring through the protection ring and the sealing gasket; the right shell and the left shell are connected through threads and make contact with the piston, and the first spring is pre-compressed under spiral connection. The second spring and the third spring are pre-compressed under the action of the piston and the spring seat and are limited through the handle. The device is simple in structure and convenient to operate, a conduit can be quickly clamped, connection and disassembly are facilitated, the split type chucks pre-clamp the conduit under the action of spring force, the clamping force of the chucks is further increased along with increase of test pressure, sufficient clamping can be guaranteed, the pipeline manufacturing process can be optimized, and cost reduction and efficiency improvement are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of catheter detection, and particularly relates to a catheter sealing property detection device. BACKGROUND

[0002] Catheter sealing property detection is a necessary link in the production of catheters. The current technical method for welded catheters is to first weld one end of the catheter to make it closed or use a baffle to block it, then fill a test medium with a certain pressure into the catheter, and then perform a pressure maintaining test. If no leakage phenomenon occurs at the welded area, it is determined that the sealing property of the catheter weld is qualified, and subsequent work such as measurement and cutting of the blocked end is still needed. In addition, for catheters with only one side of the pipe end formed, the other end needs to be processed by flaring or rolling, etc. to facilitate the sealing property test, and after the test is completed, measurement and cutting, etc. are also needed to meet the requirements of the catheter model and drawings. The above methods have long test cycles and complicated processes, which lead to the need for a large amount of human resources and material resources, thereby making the production cost of the catheter high.

[0003] For the sealing property detection of catheter welds and catheters with only one side of the pipe end formed, the traditional sealing property detection method can test the leakage points, but it is complicated and needs to increase the process allowance, which leads to a longer production cycle and excessive material loss. In order to optimize the traditional production and manufacturing process, through investigation and research on the current technology, combined with the actual production of enterprises, a catheter sealing property detection device is designed, which can quickly realize the sealing property detection of catheter welds and catheters with only one side of the pipe end formed. SUMMARY

[0004] The utility model aims at providing a sealing property detection device for catheter welds and catheters with only one side of the pipe end formed, solving the problems of long test cycle, complicated process, high material loss rate, etc. of the above catheter sealing property detection, and in addition, it can also be used for the burst pressure detection of individual catheters, reducing the waste of production resources, and realizing efficient and easy-to-operate sealing property detection.

[0005] The utility model discloses a technical solution: a catheter sealing property detection device, including left casing, spring one, right casing, handle, piston seat, spring two, spring three, piston, protection ring, sealing washer, inner conic ring, support ring, split chuck, wherein left casing one end is connected with right casing one end through the thread, and the other end of left casing is equipped with the catheter inlet, and the other end of right casing is equipped with the connecting hole and handle fixed connection, the piston is placed in the cavity one that left casing and right casing constitute and is sealedly connected with right casing, the left end opening of piston is equipped with the passage along the axial direction, and the right end is closed, spring one is equipped on the left end outside of piston, one end of spring one is pressed against the annular boss of piston outside, and the outer side of annular boss is sealedly connected with the inner side of right casing, the other end of spring one is placed in the ring groove of left casing inner side, the left end outside of piston is sealedly connected with the inner side of left casing, the left end end face of piston is pressed against the protection ring, the protection ring is equipped with two, the protection ring between is equipped with the sealing washer, and the protection ring end face away from piston is pressed against the inner conic ring one end, the other end of inner conic ring is from the outside to the center and is in the slope angle structure, and with split chuck one end outer side surface contact, split chuck is composed of several clamping blocks, and is evenly arranged in the circumference, support ring is placed in split chuck inner side groove one, thereby limiting split chuck radial string movement under the natural state, and the other end outer side surface of split chuck is matched with the left end conical surface of left casing close to the catheter inlet and fits, the right end outside of piston is sealedly connected with the inner side of right casing, and the right end end face is equipped with groove two along the axial direction, the left end of piston seat is equipped with the step groove to the inside, and groove two and step groove form cavity two, spring three is equipped together in cavity two on spring two outside, spring three can press against the first step surface of step groove, spring two can press against the second step surface of step groove, the right end of piston seat is equipped with the flange and can contact with the boss end face of right end inner side of right casing, and the right end end face of piston seat is fixedly connected with the left end of handle, the handle is equipped with through -hole one in the radial direction close to piston seat one end, and through -hole one and two connecting holes are fixedly connected through the fixed pin, thereby making left casing and right casing produce axial location to piston, the inner side of left end passage of piston is equipped with the stop end face and limits the depth of catheter insertion device, and the left end of piston is equipped with several through -hole two on the side wall of groove two, annular boss and stop end face, the side wall of right casing is equipped with fluid inlet, and fluid inlet, through -hole two and passage are communicated.

[0006] Further, the outer side of the annular boss is provided with a sealing ring one at the connection with the inner side of the right casing.

[0007] Further, the outer side of the right end of the piston is provided with a sealing ring two at the contact with the inner side of the right casing.

[0008] Further, the outer side of the left end of the piston is provided with a sealing ring three at the contact with the inner side of the left casing.

[0009] The split type chuck is axially limited under the action of the left shell end face and the inner conical ring conical face; the piston transmits the force to the inner conical ring through the protection ring and the sealing gasket; the sealing gasket is in contact with the outer wall of the guide pipe and the shell, and sealing effect is generated; the right shell is connected with the left shell through threads, and is in contact with the piston, and the spring one is pre-compressed under the spiral connection; the piston realizes the sealing of the test medium through the sealing ring one, the sealing ring two, the sealing ring three and the right shell and the left shell; the spring two and the spring three are pre-compressed under the action of the piston and the spring seat, and are limited through the handle. In addition, before the end of the guide pipe is formed, the device is connected with the two ends of the guide pipe, so that the inner wall of the guide pipe can be washed, so as to ensure the cleanliness of the guide pipe. The device is compact in structure, convenient to disassemble and assemble, and can realize efficient detection of the guide pipe.

[0010] The utility model discloses the beneficial effect:

[0011] (1) without welding or plugging the end of the guide pipe, the efficient and easy-to-operate guide pipe weld guide pipe sealing detection and the guide pipe sealing detection with only one side pipe end with connecting piece can be realized, which can solve the problems of long test period, complicated process, high material loss rate and high production cost caused by waste of human resources in the current guide pipe weld sealing and guide pipe sealing test with only one side pipe end with connecting piece;

[0012] (2) convenient operation, can quickly clamp the guide pipe, and is convenient for connection and disassembly;

[0013] (3) the split type chuck pre-clamps the guide pipe under the action of the spring force, and the clamping force of the chuck will be further increased as the test pressure rises, so that sufficient clamping can be ensured;

[0014] (4) the pipeline manufacturing process is optimized to realize cost reduction and efficiency increase. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings incorporated into the specification and forming a part thereof show, in accordance with a preferred embodiment of the present utility model, and, together with the description, function to explain the principle of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art. In the drawings:

[0016] Fig. 1 The structure schematic view of the guide pipe sealing detection device provided by the utility model;

[0017] Fig. 2 The perspective view of the guide pipe sealing detection device provided by the utility model;

[0018] Fig. 3 The structure schematic view of the right shell provided by the utility model;

[0019] In the drawings: 1 - left shell, 2 - spring one, 3 - sealing ring one, 4 - right shell, 5 - handle, 6 - piston seat, 7 - spring two, 8 - sealing ring two, 9 - spring three, 10 - piston, 11 - sealing ring three, 12 - protection ring, 13 - sealing pad, 14 - inner conical ring, 15 - support ring, 16 - split chuck, 17 - cavity one, 18 - cavity two, 101 - catheter inlet, 102 - annular groove, 103 - inner end face, 401 - fluid inlet, 402 - connecting hole, 403 - boss end face, 501 - through hole one, 502 - fixing pin, 601 - stepped groove, 602 - first stepped face, 603 - second stepped face, 604 - flange, 1001 - stop end face, 1002 - annular boss, 1003 - groove two, 1004 - through hole two, 1005 - channel, 1401 - inner conical face, 1601 - groove one. DETAILED DESCRIPTION

[0020] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art.

[0021] Reference will now be made to Figs. 1-3The utility model provides a conduit leakproofness detection device structure schematic diagram, a conduit leakproofness detection device, including left casing 1, spring one 2, right casing 4, handle 5, piston seat 6, spring two 7, spring three 9, piston 10, protection ring 12, sealing pad 13, inner conical ring 14, support ring 15, split chuck 16, wherein left casing 1 one end internal thread and right casing 4 one end external thread are connected through thread, and the other end of left casing 1 is equipped with conduit inlet 101, and the other end of right casing 4 is equipped with the fixed connection of two symmetrical connecting holes 402 and handle 5, piston 10 is placed in the cavity one 17 that left casing 1 and right casing 4 form, and piston 10 is sealedly connected with right casing 4, the left end opening of piston 10 is equipped with passageway 1005 along the axial direction, and the right end is closed, spring one 2 is sleeved on the left end outside of piston 10, one end of spring one 2 is against the left side end face of annular boss 1002 outside piston 10, the left side end face of annular boss 1002 outside is sealedly connected with the inside of right casing 4, the other end of spring one 2 is placed in the annular groove 102 of left casing 1 inside, the left end outside of piston 10 is sealedly connected with the inside of left casing 1, the left end end face of piston 10 is against protection ring 12, protection ring 12 is equipped with two, sealing pad 13 is equipped between protection ring 12, and the end face of protection ring 12 away from piston 10 is against one end of inner conical ring 14, the other end of inner conical ring 14 is from the outside to the center and presents inner conical surface 1401, and can contact with one end outside surface of split chuck 16, split chuck 16 is formed by several clamping blocks, and is uniformly arranged in the circumferential direction, support ring 15 is placed in split chuck 16 inside recess one 1601, thereby limit split chuck 16 radial string movement under the natural state, and the other end end face of split chuck 16 cooperates with the inside end face 103 of left casing 1 close to conduit inlet 101 end, the right end outside of piston 10 is sealedly connected with the inside of right casing 4, and the right end end face of piston 10 is equipped with recess two 1003 along the axial direction, the left end of piston seat 6 is equipped with step groove 601 towards the inside, recess two 1003 and step groove 601 form cavity two 18, spring three 9 is sleeved on the outside of spring two 7 together and is placed in cavity two 18, spring three 9 can be against the first step surface 602 of step groove 601, spring two 7 can be against the second step surface 603 of step groove 601, the right end of piston seat 6 is equipped with flange 604 can contact with right end inside boss end face 403 of right casing 4, and the right end end face of piston seat 6 is fixedly connected with the left end of handle 5, handle 5 is equipped with through hole one 501 radially near piston seat 6 one end, and through hole one 501 is fixedly connected with two connecting holes 402 through fixed pin 502, thereby make left casing 1 and right casing 4 produce axial location to piston 10, the inside of passageway 1005 of piston 10 left end is equipped with stop end face 1001 and limits the depth of conduit insertion device, and the sidewall of recess two 1003, annular boss 1002 and stop end face 1001 away from piston 10 is equipped with several through holes two 1004,The right shell 4 side wall is provided with a fluid inlet 401, the fluid inlet 401, the through hole two 1004, the channel 1005 are communicated. The outer side of the annular boss 1002 is provided with a sealing ring one 3 at the connection with the inner side of the right shell 4, the outer side of the piston 10 right end is provided with a sealing ring two 8 at the contact with the inner side of the right shell 4, the outer side of the piston 10 left end is provided with a sealing ring three 11 at the contact with the inner side of the left shell 1.

[0022] The split chuck 16 is axially limited under the action of the inner end face of the left shell 1 and the inner taper surface 1401 of the inner taper ring 14; the piston 10 transmits the force to the inner taper ring 14 through the two protective rings 12 and the sealing gasket 13; the sealing gasket 13 contacts with the outer wall of the catheter and the shell to produce a sealing effect; the right shell 4 is connected with the left shell 1 through threads and contacts with the piston 10, and pre-compresses the spring one 2 under the spiral connection; the piston 10 realizes the sealing of the test medium through the sealing ring one 3, the sealing ring two 8, the sealing ring three 11 and the right shell 4 and the left shell 1; the spring two 7 and the spring three 9 are pre-compressed under the action of the piston 10 and the spring seat 6, and are limited by the handle 5.

[0023] The functions of each component: the split chuck 16 is used for clamping the catheter; the inner taper surface 1401 of the inner taper ring 14 acts on the split chuck 16 to make it fully clamp the catheter; the two protective rings 12 protect the sealing gasket 13 and transmit the force from the piston 10; the right shell 4 is connected with the left shell 1 and axially limits the piston 10, further compresses the spring 2 to generate a pre-tightening force, and ensures the piston 10 to reset after working; the sealing gasket 13 and the sealing ring one 3, the sealing ring two 8, the sealing ring three 11 form a seal to ensure that the pressure in the catheter meets the test requirements; the piston 10 is provided with a stop end face 1001 to limit the depth of the catheter inserted into the device; the piston 10 is provided with a fluid channel 1005 to make the test medium enter the catheter inner wall channel; the spring two 7 and the spring three 9 generate a reset pre-tightening force under the action of the piston 10 and the piston seat 6, and are limited by the handle 5.

[0024] The working process: the catheter is inserted into the split chuck 16, and the protective ring 12 and the sealing gasket 13 are passed until the piston 10 stop end face 1001, the handle 5 is pressed down, the piston seat 6 moves left, the spring two 7 and the spring three 9 are compressed, the piston 10 moves left, the force is transmitted to the inner taper ring 14 through the protective ring 12 and the sealing gasket 13, the inner taper ring 14 generates axial movement, the split chuck 16 is compressed, and the split chuck 16 generates radial contraction under the action of the inner taper surface 1401, so as to clamp the catheter. In addition, during the test, the piston 10 will generate an axial force to the left under the action of the test medium with working pressure, so as to further clamp the catheter by the split chuck 16. After the test is completed, the pressure is released, the handle 5 is reset, and the catheter can be pulled out.

[0025] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0026] In the description of the present application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0027] For the convenience of description, spatial relative terms such as "above", "upper", "on", "top", "bottom", etc. can be used herein to describe one device or feature's spatial position relationship with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0028] In addition, it needs to be explained that the use of "first", "second" and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore, it cannot be understood as a limitation on the protection scope of the present application.

[0029] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit, the modifications or equivalent replacements made by the person skilled in the art to the technical solutions of the present application, as long as they do not depart from the spirit and scope of the technical solutions of the present application, are all covered in the claim scope of the present application.

Claims

1. A catheter sealing detection device, characterized in that: The utility model provides a kind of left shell (1), spring one (2), right shell (4), handle (5), piston seat (6), spring two (7), spring three (9), piston (10), protection ring (12), sealing pad (13), inner conical ring (14), support ring (15), split chuck (16), wherein the left shell (1) one end and right shell (4) one end are connected by thread, left shell (1) other end is equipped with catheter inlet (101), right shell (4) other end is equipped with two symmetrical connecting holes (402) and handle (5) fixed connection, the piston (10) is placed in the cavity one (17) of left shell (1) and right shell (4) and is sealedly connected with right shell (4), the left end of the piston (10) is opened and is equipped with passageway (1005) along axial direction, right end is closed, the spring one (2) is sleeved on the left end outside of the piston (10), the spring one (2) one end is against the annular boss (1002) outside of piston (10), the annular boss (1002) outside face is sealedly connected with right end inside of right shell (4), the spring one (2) other end is placed in the annular groove (102) inside of left shell (1), the left end outside of the piston (10) is sealedly connected with left shell (1) inside, the left end end face of the piston (10) is against protection ring (12), the protection ring (12) is equipped with two, the protection ring (12) between is equipped with sealing pad (13), the protection ring (12) end face away from piston (10) is against inner conical ring (14) one end, the other end of the inner conical ring (14) is equipped with inner taper surface (1401) from outside to center, and inner taper surface (1401) is contacted with one end outside of split chuck (16), the split chuck (16) is composed of several clamping blocks, and is uniformly arranged in circumferential direction, the support ring (15) is placed in the inner groove one (1601) of split chuck (16), so as to limit the radial string of split chuck (16) in natural state, split chuck (16) other end end face is matched with the cooperation of left shell (1) end face (103) close to catheter inlet (101) end inside, the right end outside of the piston (10) is sealedly connected with right shell (4) inside, right end end face is equipped with recess two (1003) along axial direction, the piston seat (6) left end is equipped with stepped groove (601) inwards, recess two (1003) and stepped groove (601) form cavity two (18), the spring three (9) is sleeved on the outside of spring two (7) together and is placed in cavity two (18), the spring three (9) can be against the first stepped surface (602) of stepped groove (601), the spring two (7) can be against the second stepped surface (603) of stepped groove (601), the piston seat (6) right end is equipped with flange (604) can be contacted with right end inside boss end face (403) of right shell (4), piston seat (6) right end end face is fixedly connected with handle (5) left end, the handle (5) is equipped with through hole one (501) in radial direction close to piston seat (6) one end, through hole one (501) and two connecting holes (402) are fixedly connected through fixed pin (502),This allows the left housing (1) and right housing (4) to axially limit the piston (10). The piston (10) has a stop face (1001) inside the left end channel (1005) to limit the depth of the catheter insertion device. The piston (10) avoids the groove (1003), annular boss (1002), and stop face (1001). Several through holes (1004) are provided on the sidewall of the piston (10). A fluid inlet (401) is provided on the sidewall of the right housing (4). The fluid inlet (401), through holes (1004), and channel (1005) are interconnected.

2. The catheter sealing detection device according to claim 1, characterized in that: A sealing ring (3) is provided at the connection between the outer side of the annular boss (1002) and the inner side of the right shell (4).

3. The catheter sealing detection device according to claim 1, characterized in that: A sealing ring 2 (8) is provided at the contact point between the outer side of the right end of the piston (10) and the inner side of the right housing (4).

4. The catheter sealing detection device according to claim 1, characterized in that: A sealing ring 3 (11) is provided at the contact point between the outer side of the left end of the piston (10) and the inner side of the left housing (1).

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