Uniform boosting device and method for large-volume elastic element

Abstract

The invention discloses a large-volume elastic element uniform boosting device and method, and belongs to the technical field of pipeline rapid boosting. After the sleeve is inserted into the inner cavity of the elastic element and occupies the space of the inner cavity as large as possible, a pressing layer for pressing is formed between the sleeve and the outer wall of the sleeve, the volume of a gas medium is reduced, and the effect of rapid and uniform boosting is achieved. The inside of the sleeve is divided into a front section, a middle section and a tail section according to the length of the elastic element; a first pressing joint for pressing the front section of the sleeve, a second pressing joint for pressing the middle section of the sleeve and a third pressing joint for pressing the tail section of the sleeve are arranged on one side of the elastic element, and pressure outlet holes are respectively formed in the outer pipe of the sleeve at the front section, the middle section and the tail section of the sleeve. Pressure enters the test piece through a plurality of channels to realize uniform pressure boosting, and the pressing sequence can be controlled according to the time sequence, so that the pressed element is prevented from the risks of overpressure, deformation and the like, and the blank that a large-volume elastic element cannot be subjected to uniform pressure boosting test is filled.

Description

Technical Field

[0001] The present invention belongs to the technical field of rapid pipeline pressure increase, and in particular relates to a device and method for uniformly increasing pressure of a large-volume elastic element. Background Art

[0002] In the existing large-volume test specimen rapid pressure increase test, due to the fast pressure increase rate, the pressure usually changes significantly in some parts, resulting in the risk of overpressure and deformation at the location where the pressure of the specimen changes significantly. Figure 1 As shown, the existing pressure element is connected to the test piece sealing flange at both ends of the elastic element, and then fixed by the sealing blind plate arranged on the outside of the sealing flange. The pressure joint is connected to one end of the elastic element, which passes through the sealing blind plate and the sealing flange and is directly connected to the inner cavity of the elastic element. Since the gas enters from one side of the elastic element, and the elastic element is generally a hose longer than 3m, the pressure medium in the A area of ​​the elastic element increases quickly, and the pressure in the B area slows down. When it reaches the C area, it becomes the area with the slowest pressure increase. After this method of pressure, the pressure in the elastic element is uneven, resulting in inaccurate subsequent test results. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention aims to provide a method for uniformly increasing the pressure of a large-volume elastic element, so as to make the pressure of the large-volume elastic element uniform and achieve the purpose of rapid pressure generation.

[0004] The technical solution adopted by the invention is: a uniform pressure-boosting device for a large-volume elastic element, the technical key points of which are: comprising a sleeve, the sleeve is a double-layer structure composed of an outer tube and an inner tube, the sleeve is inserted into the inner cavity of the elastic element and occupies the inner cavity space as much as possible to form a pressure layer for pressure with the outer wall of the sleeve; the inside of the sleeve is divided into a front section, a middle section and a tail section according to the length of the elastic element, and each section is separated by a longitudinal seal; a first pressure joint for pressing the front section of the sleeve, a second pressure joint for pressing the middle section of the sleeve and a third pressure head for pressing the tail section of the sleeve are arranged on one side of the elastic element, and pressure outlet holes are also respectively arranged on the outer tubes of the sleeves of the front section, middle section and tail section of the sleeve.

[0005] In the above solution, the first pressure joint is communicated with the inner wall of the front section of the casing.

[0006] In the above solution, the second pressure joint passes through the front section of the casing and is connected with the middle section of the casing.

[0007] In the above solution, the third pressure joint passes through the front section and the middle section of the casing and is communicated with the inner wall of the rear section.

[0008] In the above scheme, the pressure outlet holes on the rear section of the casing are more than those on the middle section of the casing, and the pressure outlet holes on the middle section of the casing are more than those on the front section of the casing.

[0009] A method for uniformly boosting the pressure of a large-volume elastic element is used to perform pressure boosting using the device for uniformly boosting the pressure of the large-volume elastic element. The technical key points of the method are as follows: a sleeve is installed in the inner cavity of the elastic element, and the inner diameter of the sleeve is selected to be as large as possible to occupy the inner cavity space of the sleeve, so that the pressure layer is as small as possible; the elastic element is pressed in the order of first pressing the sleeve tail section through a third pressure joint, then pressing the sleeve middle section through a second pressure joint, and finally pressing the sleeve front section through a first pressure joint. The beneficial effects of the present invention are as follows: the device and method for uniformly boosting pressure of a large-volume elastic element, after the sleeve is inserted into the inner cavity of the elastic element and occupies the inner cavity space as much as possible, a pressure layer for pressure is formed between the sleeve and the outer wall, reducing the volume of the gas medium, and achieving the effect of rapid and uniform pressure boost. The inside of the sleeve is divided into the front section, the middle section and the tail section according to the length of the elastic element, and each section is separated by a longitudinal seal; a first pressure joint for pressure boosting the front section of the sleeve, a second pressure joint for pressure boosting the middle section of the sleeve and a third pressure head for pressure boosting the tail section of the sleeve are arranged on one side of the elastic element, and pressure outlet holes are also arranged on the outer tubes of the sleeves of the front section, the middle section and the tail section of the sleeve. The pressure enters the interior of the test piece through multiple channels to achieve uniform pressure boosting, and the pressure boosting sequence can be controlled in time sequence, so that the element after pressure boosting avoids risks such as overpressure and deformation, filling the gap that large-volume elastic elements cannot be tested for uniform pressure boosting. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 It is a schematic diagram of the pressing structure of a large-volume elastic element in the prior art of the present invention; Figure 2 It is a schematic diagram of the pressing structure of a large-volume elastic element in an embodiment of the present invention; Figure 3 Schematic diagram of the front section structure of the casing in an embodiment of the present invention, (a) is a main view; (b) is a cross-sectional view; Figure 4 Schematic diagram of the middle section structure of the casing in an embodiment of the present invention, (a) is a main view; (b) is a cross-sectional view; Figure 5 Schematic diagram of the casing tail section structure in an embodiment of the present invention, (a) is a main view; (b) is a cross-sectional view; The serial numbers in the figure are explained as follows: 1 pressure joint, 2 test piece sealing flange, 3 elastic element, 4 first pressure joint, 5 second pressure joint, 6 third pressure joint, 7 pressure outlet hole, 8 casing plug, 9 casing, 91 front section, 92 middle section, 93 tail end, 94 outer tube, 95 inner tube. DETAILED DESCRIPTION

[0012] To make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the following is a brief description of the present invention in conjunction with the attached Figure 1-Figure 5 The present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

[0013] The present embodiment includes a sleeve 9, which is a double-layer structure consisting of an outer tube 94 and an inner tube 95. The sleeve 9 is inserted into the inner cavity of the elastic element 3 and occupies the inner cavity space as much as possible to form a pressing layer between the sleeve and the outer wall. The inner diameter of the sleeve of the present embodiment is as close as possible to the inner diameter of the elastic element. By using the space occupied by the inner diameter of the elastic element, the pressing space can be reduced, thereby ensuring uniform diffusion of gas and avoiding risks such as overpressure and deformation during the pressing process due to the excessive length or large volume of the elastic element. The sleeve 9 is divided into a front section 91, a middle section 92 and a tail section 93 according to the length of the elastic element 3. The sections are separated by longitudinal seals, and the tail end of the sleeve 9 is blocked by a sleeve plug 8. On one side of the elastic element 3, there are provided a first pressing joint 4 for pressing the front section 91 of the casing, a second pressing joint 5 for pressing the middle section 92 of the casing, and a third pressing head 6 for pressing the tail section 93 of the casing, wherein the first pressing joint 4 is communicated with the inner wall of the front section 91 of the casing, the second pressing joint 5 passes through the front section 91 of the casing and is communicated with the middle section 92 of the casing, and the third pressing joint 6 passes through the front section 91 and the middle section 92 of the casing and is communicated with the inner wall of the tail section 93. Pressure outlet holes 8 are also provided on the outer tube 94 of the casing of the front section 91, the middle section 92 and the tail section 93 of the casing, respectively, wherein the pressure outlet holes 7 on the tail section 93 of the casing are more than the pressure outlet holes 7 on the middle section 92 of the casing, and the pressure outlet holes 7 on the middle section 92 of the casing are more than the pressure outlet holes 7 on the front section 91 of the casing.

[0014] The present embodiment adopts a method for uniformly boosting the pressure of a large-volume elastic element, which uses a device for uniformly boosting the pressure of a large-volume elastic element to perform pressure testing, including the following steps: installing the sleeve 9 in the inner cavity of the elastic element 3, and selecting the inner diameter of the sleeve 9 to be as large as possible to occupy the inner cavity space of the sleeve, so that the pressure testing layer is as small as possible. The elastic element 3 is pressed in the order of first pressing the sleeve tail section 93 through the third pressure testing joint 6, then pressing the sleeve middle section 92 through the second pressure testing joint 5, and finally pressing the sleeve front section 91 through the first pressure testing joint 4. The pressure testing time and sequence of this method are controllable, ensuring that the test piece will not be over-pressurized, deformed, or have other risks after the pressure testing, and is safe and reliable.

[0015] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A uniform pressure boosting device for a large elastic element, characterized in that: The invention comprises a sleeve, which is a double-layer structure composed of an outer tube and an inner tube. The sleeve is inserted into the inner cavity of the elastic element and occupies the inner cavity space as much as possible, so as to form a pressing layer for pressing between the sleeve and the outer wall of the sleeve. The inside of the sleeve is divided into a front section, a middle section and a tail section according to the length of the elastic element, and each section is separated by a longitudinal sealing member. A first pressing joint for pressing the front section of the sleeve, a second pressing joint for pressing the middle section of the sleeve and a third pressing head for pressing the tail section of the sleeve are arranged on one side of the elastic element, and pressure outlet holes are respectively arranged on the outer tubes of the sleeves of the front section, the middle section and the tail section of the sleeve.

2. A uniform pressure boosting device for a large-volume elastic element according to claim 1, characterized in that: The first pressing joint is communicated with the inner wall of the front section of the casing.

3. The large-volume elastic element uniform pressure boosting device according to claim 1, characterized in that: The second pressing joint passes through the front section of the casing and is communicated with the middle section of the casing.

4. The large-volume elastic element uniform pressure boosting device according to claim 1, characterized in that: The third pressure joint passes through the front section and the middle section of the casing and is communicated with the inner wall of the tail section.

5. The large-volume elastic element uniform pressure boosting device according to claim 1, characterized in that: The pressure outlet holes on the rear section of the casing are more than those on the middle section of the casing, and the pressure outlet holes on the middle section of the casing are more than those on the front section of the casing.

6. A method for uniformly increasing the pressure of a large-volume elastic element, using the device for uniformly increasing the pressure of a large-volume elastic element according to claim 1, characterized in that: The method comprises the following steps: installing a sleeve in the inner cavity of an elastic element, selecting a sleeve with an inner diameter as large as possible to occupy the inner cavity space of the sleeve, so that the pressing layer is as small as possible; pressing the elastic element in the order of first pressing the sleeve tail section through a third pressing joint, then pressing the sleeve middle section through a second pressing joint, and finally pressing the sleeve front section through a first pressing joint.

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