Thin-walled tube pressure testing device

Abstract

The embodiment of the utility model provides a thin-walled tube pressure testing device, a connecting tube is welded on a thin-walled tube, the testing device comprises a supporting frame, the supporting frame comprises a supporting seat and a cross beam, the cross beam is provided with a threaded hole, and the bottom of the supporting seat is provided with a first semicircular arc hole for the connecting tube to pass through; the spiral stress application rod is matched with the threaded hole, and the spiral stress application rod can move in the vertical direction through rotation; a second semi-arc hole is formed in the clamping part, the second semi-arc hole and the first semi-arc hole are matched to form a round hole used for clamping the connecting pipe, and the upper portion of the round hole expands outwards to form a horn mouth shape; the ejector pin comprises a conical section, a transition section and a connecting section, a first blind hole which penetrates through the conical section and the transition section and extends into the connecting section is formed in the ejector pin, and the connecting section is connected with a high-pressure pipe connecting threaded pipe. A reducing conversion connector is not needed, connection operation is convenient, the conical section of the ejector pin is in close fit with the horn mouth of the connecting pipe, the sealing performance is high, and meanwhile the service life is long.

Description

Technical Field

[0001] This specification relates to the technical field of aluminum alloy thin-walled tube testing, and particularly to a pressure testing device for thin-walled tubes. Background Art

[0002] In the production of aluminum ammonia channels, it is first necessary to conduct a pressure test on the heat pipe profiles, and the maximum pressure value is 20 MPa. The heat pipe profiles are made of 6063 aluminum alloy, which has a special-shaped tubular cross-section. During the pressure test, it cannot be directly connected to the pressure testing equipment and needs to be welded with a small-diameter thin wall (outer diameter φ6, inner diameter φ4).

[0003] Currently, a variable-diameter adapter is used for connection, and the connection method is mostly thread plus sealing ring. As a result, under high pressure, the sealing performance is damaged, and the service life of the connector is short when the thread is tightened forcefully. At the same time, the small-diameter thin-walled aluminum alloy tube is relatively soft and easy to deform, and it is also easy to be damaged during the operation process. Summary of the Invention

[0004] In view of this, the embodiments of this specification provide a pressure testing device for thin-walled tubes, which does not require a variable-diameter adapter, is relatively convenient for connection operations, has a high sealing performance with the tapered section of the thimble closely fitting the flared mouth of the connecting pipe, and has a long service life.

[0005] The embodiments of this specification provide the following technical solutions: A pressure testing device for thin-walled tubes, where a connecting pipe is welded to the thin-walled tube, and the testing device includes:

[0006] A support frame, which includes a support base and a cross beam. A threaded hole is provided on the cross beam, and a first semi-circular hole for the connecting pipe to pass through is provided at the bottom of the support base;

[0007] A screw force-applying rod, which is matched with the threaded hole, and the screw force-applying rod can move along the vertical direction by rotation;

[0008] A clamping part, on which a second semi-circular hole is provided. The second semi-circular hole and the first semi-circular hole cooperate to form a circular hole for clamping the connecting pipe, and the upper part of the circular hole expands outward to form a flared mouth shape;

[0009] A thimble, which includes a tapered section, a transition section, and a connecting section. The outer diameter of the small end of the tapered section is smaller than the inner diameter of the connecting pipe. A first blind hole is provided on the thimble, which penetrates through the tapered section and the transition section and extends into the connecting section. A high-pressure pipe connecting threaded pipe is connected to the connecting section, and the high-pressure pipe connecting threaded pipe is communicated with the first blind hole. The screw force-applying rod drives the thimble to move along the vertical direction, and the tapered section is inserted into the connecting pipe, so that the end of the connecting pipe forms a flared mouth shape that closely fits the tapered section.

[0010] Preferably, a mating groove for inserting the spiral force-applying rod is formed at the top of the connecting section, the bottom end of the spiral force-applying rod is inserted into the mating groove, an annular groove is formed on the spiral force-applying rod, and a plurality of pins penetrate through the connecting section and are inserted into the annular groove, so that the thimble moves synchronously along the vertical direction with the spiral force-applying rod.

[0011] Preferably, a conical groove matching with the bottom end of the spiral force-applying rod is formed at the bottom of the mating groove.

[0012] Preferably, at least two groups of pins are provided, and at least two groups of pins are evenly distributed around the axis of the connecting section.

[0013] Preferably, a connecting hole is formed in the connecting section, the first end of the connecting hole communicates with the first blind hole, and the second end of the connecting hole communicates with the connecting threaded pipe of the high-pressure pipe.

[0014] Preferably, the support seat is a U-shaped support seat, guide grooves are formed on both vertical arms of the support seat, and a guide post is connected to the connecting section, and at least part of the guide post is inserted into the guide groove.

[0015] Preferably, the clamping portion includes a clamping block and a pressing bolt, the second semi-circular hole is formed in the clamping block, and the clamping block is connected to the support seat through the pressing bolt.

[0016] Preferably, the diameters of the second semi-circular hole and the first semi-circular hole are smaller than the diameter of the connecting pipe.

[0017] Preferably, the top end of the connecting pipe exceeds the circular hole where the second semi-circular hole and the first semi-circular hole are matched by 4-6 mm.

[0018] Preferably, a knob is provided at the top of the spiral force-applying rod.

[0019] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the embodiments of the present specification at least include:

[0020] The connecting pipe is clamped and fixed by the cooperation of the clamping portion and the support seat, the thimble is pressed by the spiral force-applying rod, and the conical section of the thimble applies pressure to the connecting pipe, so that the pipe orifice gradually forms a flared shape, and the conical section is closely matched with the flared opening of the connecting pipe, and there is still no leakage under a certain pressure. The connecting threaded pipe of the high-pressure pipe is fixed on the thimble and is directly connected to the external high-pressure hose, reducing the reducer adapter. The high-pressure liquid in the pressure test equipment enters the thimble through the high-pressure hose and finally flows into the connecting pipe for pressure testing. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0022] Figure 1 is a schematic structural view of the thin-walled tube pressure testing device provided by the present application;

[0023] Figure 2 is a schematic structural view of the ejector pin of the thin-walled tube pressure testing device provided by the present application;

[0024] Figure 3 is Figure 2 a cross-sectional view taken along A-A in

[0025] Figure 4 is a schematic structural view of the spiral force-applying rod of the thin-walled tube pressure testing device provided by the present application.

[0026] In the figure, 1, support base; 2, cross beam; 3, ejector pin; 31, connecting section; 32, transition section; 33, tapered section; 34, connecting hole; 35, first blind hole; 36, mating groove; 37, tapered groove; 4, spiral force-applying rod; 5, high-pressure pipe connecting threaded pipe; 6, clamping block; 7, compression bolt; 8, connecting pipe; 9, pin; 10, guide groove; 11, guide post; 12, thin-walled tube; 13, knob; 14, annular groove. Specific Embodiments

[0027] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0028] The following specific examples illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0029] It should be noted that the following describes various aspects of embodiments within the scope of the appended claims. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on this application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement a device and / or practice a method. Additionally, this device can be implemented and this method can be practiced using other structures and / or functionality in addition to one or more of the aspects set forth herein.

[0030] It should also be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of this application. The diagrams only show the components related to this application and are not drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in its actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0031] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0032] The following describes the technical solutions provided by each embodiment of this application in conjunction with the accompanying drawings.

[0033] As Figures 1-4 shown, a thin-walled tube pressure testing device, a connecting tube 8 is welded on the thin-walled tube 12, and the testing device includes:

[0034] A support frame, the support frame includes a support base 1 and a cross beam 2, a threaded hole is provided on the cross beam 2, and a first semi-circular hole for the connecting tube 8 to pass through is provided at the bottom of the support base 1;

[0035] A spiral force applying rod 4, the spiral force applying rod 4 is matched with the threaded hole, and the spiral force applying rod 4 can move along the vertical direction by rotation;

[0036] A clamping part, a second semi-circular hole is provided on the clamping part, and the second semi-circular hole is matched with the first semi-circular hole to form a circular hole for clamping the connecting tube 8, and the upper part of the circular hole expands outward to form a flared shape;

[0037] The thimble 3, the thimble 3 includes a tapered section 33, a transition section 32 and a connecting section 31. The outer diameter of the small end of the tapered section 33 is smaller than the inner diameter of the connecting pipe 8. A first blind hole 35 is provided on the thimble 3, passing through the tapered section 33 and the transition section 32 and extending into the inside of the connecting section 31. A high-pressure pipe connecting threaded pipe 5 is connected to the connecting section 31, and the high-pressure pipe connecting threaded pipe 5 is communicated with the first blind hole 35. The spiral force-applying rod 4 drives the thimble 3 to move along the vertical direction. The tapered section 33 is inserted into the inside of the connecting pipe 8, so that a flared shape that closely fits the tapered section 33 is formed at the end of the connecting pipe 8.

[0038] By providing a first semi-circular arc hole on the support part and simultaneously providing a second semi-circular arc hole on the clamping part that matches the first semi-circular arc hole, the first semi-circular arc hole and the second semi-circular arc hole cooperate to form a circular hole with a diameter slightly smaller than that of the connecting pipe 8. The connecting pipe 8 is clamped and fixed by the cooperation of the clamping part and the support seat 1 to ensure that the connecting pipe 8 does not move. By rotating the spiral force-applying rod 4, the spiral force-applying rod 4 moves downward along the vertical direction. The spiral force-applying rod 4 presses against the thimble 3, and the tapered section 33 of the thimble 3 enters the connecting pipe 8. As the spiral force-applying rod 4 continues to move downward, the tapered section 33 applies pressure to the connecting pipe 8, causing its pipe orifice to gradually form a flared shape. The tapered section 33 and the flare of the connecting pipe 8 are closely fitted and there is no leakage under a certain pressure. The high-pressure pipe connecting threaded pipe 5 is fixed on the thimble 3 and is directly connected to an external high-pressure hose, reducing the need for a reduced-diameter adapter. The high-pressure liquid in the pressure test equipment enters the first blind hole 35 inside the thimble 3 through the high-pressure hose and finally flows into the connecting pipe 8 for pressure testing.

[0039] It should be noted that the outer surface of the tapered section 33 of the thimble 3 is smooth and free of burrs, so as to ensure a tight fit between the tapered section 33 and the flare of the connecting pipe 8 and form a good sealing effect.

[0040] As Figures 1-4 shown, in some embodiments, a mating groove 36 for inserting the spiral force-applying rod 4 is provided at the top of the connecting section 31. The bottom end of the spiral force-applying rod 4 is inserted into the mating groove 36. An annular groove 14 is provided on the spiral force-applying rod 4. A number of pins 9 pass through the connecting section 31, and the pins 9 are inserted into the annular groove 14, so that the thimble 3 moves synchronously along the vertical direction with the spiral force-applying rod 4. By providing a mating groove 36 at the top of the connecting section 31, the bottom end of the spiral force-applying rod 4 can be inserted into the mating groove 36, facilitating the spiral force-applying rod 4 to apply pressure to the thimble 3. At the same time, an annular groove 14 is provided at the lower part of the spiral force-applying rod 4. A number of pins 9 pass through the connecting section 31, and the inner ends of the pins 9 are inserted into the annular groove 14. When the spiral force-applying rod 4 moves along the vertical direction, the spiral force-applying rod 4 drives the thimble 3 to move together through the pins 9, and the up-and-down movement of the thimble 3 can be realized.

[0041] It should be noted that the mating groove 36 is circular, and the diameter of the mating groove 36 is determined according to the outer diameter of the spiral force-applying rod 4.

[0042] As Figures 2-3 shown, in some embodiments, a tapered groove 37 is formed at the bottom of the mating groove 36 to cooperate with the bottom end of the spiral force-applying rod 4. By providing the tapered groove 37 at the bottom of the mating groove 36 to cooperate with the bottom end of the spiral force-applying rod 4, the tapered portion at the bottom end of the spiral force-applying rod 4 is directly inserted into the tapered groove 37, which facilitates the spiral force-applying rod 4 to apply pressure to the ejector pin 3 and ensures the force application effect.

[0043] As Figures 1-2 shown, in some embodiments, at least two groups of pins 9 are provided, and the at least two groups of pins 9 are evenly distributed around the axis of the connecting section 31. In this embodiment, two groups of pins 9 are provided and are symmetrically distributed. In other embodiments, the number of pins 9 can also be three groups, four groups or other numbers, which can be set according to actual situations.

[0044] As Figures 1-3 shown, in some embodiments, a connecting hole 34 is formed in the connecting section 31. The first end of the connecting hole 34 communicates with the first blind hole 35, and the second end of the connecting hole 34 communicates with the high-pressure pipe connecting threaded pipe 5. By providing the horizontal connecting hole 34 on the front surface of the connecting section 31, the connecting hole 34 connects the high-pressure pipe connecting threaded pipe 5 and the first blind hole 35, which facilitates the high-pressure liquid in the external pressure testing equipment to enter the first blind hole 35 through the high-pressure pipe connecting threaded pipe 5 and the connecting hole 34, and then flow into the connecting pipe 8.

[0045] As Figure 1 shown, in some embodiments, the support base 1 is a U-shaped support base 1. Guide grooves 10 are formed on both vertical arms of the support base 1. A guide post 11 is connected to the connecting section 31, and at least a part of the guide post 11 is inserted into the guide groove 10. By providing the guide grooves 10 on the vertical arms of the support base 1 and connecting the guide post 11 on the connecting section 31 to cooperate with the guide grooves 10, when the ejector pin 3 moves in the vertical direction, the guide post 11 slides along the guide groove 10, which can play a role in limiting and guiding, and ensure that the ejector pin 3 moves in the vertical direction.

[0046] It should be noted that in other embodiments, the guiding can also be carried out in the way of a guide rail and a slider, which can be set according to actual situations.

[0047] As Figure 1As shown, in some embodiments, the clamping portion includes a clamping block 6 and a compression bolt 7. The second semi-circular hole is formed in the clamping block 6. The clamping block 6 is connected to the support base 1 through the compression bolt 7. The connecting pipe 8 is placed in the first semi-circular hole on the support portion, and the clamping block 6 is installed on the support portion through the compression bolt 7, so that the second semi-circular hole cooperates with the first semi-circular hole. By tightening the compression bolt 7, the connecting pipe 8 is fixed between the clamping block 6 and the support base 1.

[0048] As Figure 1 shown, in some embodiments, the diameters of the second semi-circular hole and the first semi-circular hole are smaller than the diameter of the connecting pipe 8, and the diameters of the second semi-circular hole and the first semi-circular hole are slightly smaller than the diameter of the connecting pipe 8, ensuring that the clamping block 6 and the support base 1 can clamp and fix the connecting pipe 8.

[0049] In some embodiments, the top end of the connecting pipe 8 exceeds the circular hole 4 - 6 mm where the second semi-circular hole and the first semi-circular hole cooperate. The top end of the connecting pipe 8 exceeds the circular hole by about 4 - 6 mm, ensuring that the conical section 33 can press the exceeding part of the connecting pipe 8 into a flared shape.

[0050] As Figure 1 shown, in some embodiments, a knob 13 is provided at the top of the spiral force-applying rod 4. By providing the knob 13 at the top of the spiral force-applying rod 4, the spiral force-applying rod 4 can be rotated by turning the knob 13, facilitating the rotation of the spiral force-applying rod 4.

[0051] For the same or similar parts among the various embodiments in this specification, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the method embodiments described later, since they correspond to the system, the description is relatively simple, and reference can be made to the relevant parts of the system embodiments for the related content.

[0052] The above are only the specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A thin-walled tube pressure testing device, wherein a connecting tube is welded to the thin-walled tube, characterized in that: The testing device comprises: A support frame, the support frame comprises a support seat and a crossbeam, the crossbeam is provided with a threaded hole, and the bottom of the support seat is provided with a first semicircular arc hole for the connecting pipe to pass through; A spiral force rod, the spiral force rod is matched with the threaded hole, and the spiral force rod can move along the vertical direction by rotating; A clamping portion, wherein a second semicircular arc hole is formed on the clamping portion, and the second semicircular arc hole cooperates with the first semicircular arc hole to form a circular hole for clamping the connecting pipe, and the upper part of the circular hole expands outward to form a trumpet shape; A ejector pin, wherein the ejector pin comprises a tapered section, a transition section and a connecting section, wherein the outer diameter of the small end of the tapered section is smaller than the inner diameter of the connecting tube, and the ejector pin is provided with a first blind hole that penetrates the tapered section and the transition section and extends into the interior of the connecting section, and the connecting section is connected with a high-pressure pipe connecting threaded tube, and the high-pressure pipe connecting threaded tube is communicated with the first blind hole, and the spiral force rod drives the ejector pin to move in a vertical direction, and the tapered section is inserted into the interior of the connecting tube, so that the end of the connecting tube forms a bell-mouth shape that fits tightly with the tapered section.

2. The thin-walled pipe pressure testing device according to claim 1, characterized in that: A matching groove for inserting the spiral boosting rod is provided at the top of the connecting section, and the bottom end of the spiral boosting rod is inserted into the matching groove. An annular groove is provided on the spiral boosting rod, and a plurality of pins pass through the connecting section. The pins are inserted into the annular groove, so that the ejector pin moves synchronously with the spiral boosting rod along the vertical direction.

3. The thin-walled pipe pressure testing device according to claim 2, characterized in that: The bottom of the matching groove forms a tapered groove matching with the bottom end of the spiral boosting rod.

4. The thin-walled pipe pressure testing device according to claim 2, characterized in that: The pins are arranged in at least two groups, and the at least two groups of pins are evenly distributed around the axis of the connecting section.

5. The thin-walled pipe pressure testing device according to claim 1, characterized in that: A connecting hole is provided on the connecting section, a first end of the connecting hole is connected to the first blind hole, and a second end of the connecting hole is connected to the high-pressure pipe connecting threaded pipe.

6. The thin-walled pipe pressure testing device according to claim 1, characterized in that: The support seat is a U-shaped support seat, and guide grooves are provided on the two groups of vertical arms of the support seat. A guide column is connected to the connecting section, and the guide column is at least partially inserted into the guide groove.

7. The thin-walled pipe pressure testing device according to any one of claims 1 to 6, characterized in that: The clamping portion includes a clamping block and a clamping bolt. The second semicircular arc hole is opened on the clamping block. The clamping block is connected to the support seat through the clamping bolt.

8. The thin-walled pipe pressure testing device according to claim 1, characterized in that: The diameters of the second semicircular arc hole and the first semicircular arc hole are smaller than the diameter of the connecting pipe.

9. The thin-walled pipe pressure testing device according to claim 8, characterized in that: The top end of the connecting pipe exceeds the circular hole of the second semicircular arc hole matched with the first semicircular arc hole by 4 to 6 mm.

10. The thin-walled pipe pressure testing device according to claim 1, characterized in that: A knob is arranged on the top of the spiral force adding rod.

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