A detection device for cryogenic stop valve with automatic alignment sealing structure

Abstract

The utility model discloses a detection device for low temperature stop valve with automatic alignment sealing structure, including base, and the bottom end rear side of top plate is connected with the middle of bottom end through the support plate in base, and the front side of top plate lower end is connected with the positive face upper end of support plate through the symmetric setting reinforcing rod, and the middle of top plate lower end is provided with upper sealing mechanism, and the both sides of detection water tank bottom that upper sealing mechanism below is provided are connected with the upper end of base through support frame, and the inside middle of detection water tank is provided with lower sealing mechanism, and the position of lower sealing mechanism corresponds with the position of upper sealing mechanism and sets up. This detection device for low temperature stop valve with automatic alignment sealing structure, through electric linear guide rail and electric hydraulic cylinder and detection assembly collocation use, is convenient for to the low temperature stop valve top connecting port that places on lower sealing mechanism and positions, makes the position of upper sealing assembly can be accurate with connecting port butt joint automatically, improves butt joint accuracy, and also improves efficiency and the accuracy of detection result.

Description

Technical Field

[0001] This utility model relates to the technical field of low-temperature shut-off valve testing, specifically a testing device for low-temperature shut-off valves with an automatic alignment and sealing structure. Background Technology

[0002] A cryogenic shut-off valve is a valve in which the closing element (valve disc) moves along the centerline of the valve seat. Due to this movement of the valve disc, the change in the valve seat opening is directly proportional to the valve disc stroke. Because this type of valve has a relatively short opening or closing stroke and a highly reliable shut-off function, and because the change in the valve seat opening is directly proportional to the valve disc stroke, it is very suitable for flow regulation. Therefore, this type of valve is ideal for shut-off, regulation, and throttling applications. The airtightness of a cryogenic shut-off valve is a crucial indicator of its normal operation. Problems with airtightness will severely affect its normal functioning. Therefore, after the cryogenic shut-off valve is manufactured, its airtightness must be tested.

[0003] The existing detection device has some shortcomings in use. It requires manual adjustment and alignment during the detection process, which is not only inefficient but also makes it difficult to guarantee the alignment accuracy, thus affecting the accuracy of the detection results. To address these issues, the existing equipment needs to be improved. Utility Model Content

[0004] The purpose of this invention is to provide a detection device for a cryogenic shut-off valve with an automatic alignment and sealing structure, in order to solve the problems mentioned in the background art regarding the shortcomings of existing detection devices in use, such as the need for manual adjustment of alignment during the detection process, which is not only inefficient but also makes it difficult to guarantee alignment accuracy, thus affecting the accuracy of the detection results.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a detection device for a cryogenic shut-off valve with an automatic alignment and sealing structure, comprising a base,

[0006] The upper middle of the base is connected to the lower rear side of the top plate via a support plate, and the lower front side of the top plate is connected to the upper front of the support plate via symmetrically arranged reinforcing rods. An upper sealing mechanism is located in the middle of the lower part of the top plate. This upper sealing mechanism includes an electric linear guide, an electric hydraulic cylinder, and an upper sealing assembly. Two electric linear guides are symmetrically arranged, and their lower ends are connected to the upper side of the upper sealing assembly via corresponding electric hydraulic cylinders. The upper sealing assembly is connected to a quantitative air pump via a gas supply pipe that passes through the support plate. The bottom of the detection water tank located below the upper sealing mechanism is connected to the upper part of the base via support frames on both sides. A lower sealing mechanism is located inside the detection water tank, and its position corresponds to that of the upper sealing mechanism.

[0007] Preferably, the upper sealing assembly includes an upper positioning plate, and an upper engaging frame is threadedly connected to the lower middle of the upper positioning plate. An elastic rubber sleeve is provided inside the upper engaging frame. A sealing cover is provided on the upper inner side of the elastic rubber sleeve, and a detection component is provided on the inner lower side of the sealing cover. The top of the air inlet head provided in the sealing cover is detachably connected to the lower end of the air supply pipe.

[0008] Preferably, the detection component includes a laser rangefinder and an image recognition camera.

[0009] Preferably, the lower ends of both sides of the detection water tank are respectively provided with a liquid extraction pipe and a liquid delivery pipe, and the liquid extraction pipe and the liquid delivery pipe are provided with a liquid extraction pump and a liquid delivery pump. At the same time, the other end of the liquid extraction pipe and the liquid delivery pipe is connected to a liquid storage tank provided on the rear side of the upper end of the base.

[0010] Preferably, the lower sealing mechanism includes a lifting frame, a positioning rod, a buffer spring, and a lower sealing assembly. The lifting frame has an inverted T-shaped structure. The lower ends of the lifting frame are connected to the base through symmetrically arranged positioning rods. The top of the lifting frame passes through the sealing element and buffer spring in the middle of the detection water tank and is connected to the lower end of the lower sealing assembly. The lower sealing assembly is slidably connected to the guide rails correspondingly arranged inside the detection water tank on both sides.

[0011] Preferably, the lower sealing assembly includes a lower positioning plate, and a lower locking frame is threadedly connected to the middle of the upper end of the lower positioning plate. At the same time, a rubber air cushion is provided inside the lower locking frame. The rubber air cushion has a ring structure, and the two lower ends of the rubber air cushion are respectively connected to an air pump and a vacuum pump through connecting pipes. Meanwhile, the other ends of the air pump and the vacuum pump are connected through a T-connector. The T-connector is located in the positioning hole opened in the middle of the front of the lower positioning plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the detection device for a cryogenic shut-off valve with an automatic alignment and sealing structure,

[0013] To address the shortcomings of existing testing devices, such as the need for manual alignment adjustments during testing, which is inefficient and lacks precision, thus affecting the accuracy of test results, this application proposes a solution. This solution utilizes an electric linear guide, an electric hydraulic cylinder, and testing components to facilitate the positioning of the top connection port of the cryogenic shut-off valve placed on the lower sealing mechanism. This allows the upper sealing component to automatically and accurately align with the connection port, improving alignment precision, efficiency, and the accuracy of test results. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present invention;

[0015] Figure 2This is a schematic diagram of the rear view structure of this utility model;

[0016] Figure 3 This is a front view cross-sectional structural diagram of the upper sealing assembly of this utility model;

[0017] Figure 4 This is a front view cross-sectional structural diagram of the water tank of this utility model;

[0018] Figure 5 This is a front view cross-sectional structural diagram of the lower sealing component of this utility model.

[0019] In the diagram: 1. Base; 2. Support plate; 3. Top plate; 4. Reinforcing rod; 5. Upper sealing mechanism; 501. Electric linear guide; 502. Electric hydraulic cylinder; 503. Upper sealing assembly; 5031. Upper positioning plate; 5032. Upper locking frame; 5033. Elastic rubber sleeve; 5034. Sealing cover; 5035. Detection assembly; 5036. Air inlet head; 504. Air supply pipe; 505. Quantitative air supply pump; 6. Detection water tank; 601. Sealing element. 602. Guide rail; 7. Support frame; 8. Lower sealing mechanism; 801. Lifting frame; 802. Positioning rod; 803. Buffer spring; 804. Lower sealing assembly; 8041. Lower positioning plate; 8042. Lower locking frame; 8043. Rubber air cushion; 8044. Air pump; 8045. Air pump; 8046. T-connector; 9. Liquid extraction pipe; 901. Liquid extraction pump; 10. Liquid delivery pipe; 1001. Infusion pump; 11. Storage tank. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 This utility model provides a technical solution: a detection device for a cryogenic shut-off valve with an automatic alignment and sealing structure, based on... Figure 1 , Figure 2 and Figure 3As shown, the upper middle of the base 1 is connected to the lower rear side of the top plate 3 via a support plate 2, and the lower front side of the top plate 3 is connected to the upper front of the support plate 2 via symmetrically arranged reinforcing rods 4. At the same time, an upper sealing mechanism 5 is provided in the middle of the lower end of the top plate 3. The upper sealing mechanism 5 includes an electric linear guide rail 501, an electric hydraulic cylinder 502, and an upper sealing component 503. Two electric linear guide rails 501 are symmetrically arranged, and the lower ends of the two electric linear guide rails 501 are connected to the upper side of the upper sealing component 503 via correspondingly arranged electric hydraulic cylinders 502. The electric linear guide rails 501 drive the electric hydraulic cylinders 502 and the upper sealing component 503 to move, which facilitates the adjustment of the position of the upper sealing component 503. At the same time, the upper sealing component 503 is connected to a metered air pump 505 through the support plate 2 via an air supply pipe 504. The metered air pump 505 facilitates the delivery of external air to the low-temperature shut-off valve through the air supply pipe 504 for airtightness testing.

[0022] Specifically, the upper sealing assembly 503 includes an upper positioning plate 5031, and an upper engaging frame 5032 is threadedly connected to the lower middle of the upper positioning plate 5031. An elastic rubber sleeve 5033 is installed inside the upper engaging frame 5032, and a sealing cover 5034 is installed on the upper inner side of the elastic rubber sleeve 5033. The upper engaging frame 5032, the elastic rubber sleeve 5033, and the sealing cover 5034 work together to facilitate locking and sealing the top connection port of the cryogenic shut-off valve. A detection assembly 5035 is installed on the inner lower side of the sealing cover 5034. The detection assembly 5035 includes a laser rangefinder sensor and an image recognition camera. The laser rangefinder sensor and image recognition camera are existing technologies. Their combined use facilitates obtaining the position and size information of the cryogenic shut-off valve, improving the accuracy of automatic alignment and sealing. The top of the air inlet head 5036 installed in the sealing cover 5034 is detachably connected to the lower end of the gas delivery pipe 504.

[0023] according to Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the bottom of the detection water tank 6 located below the upper sealing mechanism 5 is connected to the upper end of the base 1 via support frames 7 on both sides. The lower ends of the two sides of the detection water tank 6 are respectively provided with a liquid extraction pipe 9 and a liquid delivery pipe 10, and a liquid extraction pump 901 and a liquid delivery pump 1001 are provided on the liquid extraction pipe 9 and the liquid delivery pipe 10. At the same time, the other end of the liquid extraction pipe 9 and the liquid delivery pipe 10 are connected to the liquid storage tank 11 located on the rear side of the upper end of the base 1. The liquid extraction pipe 9, the liquid delivery pipe 10, the liquid extraction pump 901, the liquid delivery pump 1001 and the liquid storage tank 11 are used together to facilitate the addition or discharge of liquid inside the detection water tank 6, so that the low temperature shut-off valve is located inside the liquid during the test. After the test is completed, the liquid is drained and the low temperature shut-off valve is exposed, which improves the practicality of use. The lower sealing mechanism 8 is provided in the middle of the inside of the detection water tank 6, and the position of the lower sealing mechanism 8 corresponds to the position of the upper sealing mechanism 5.

[0024] Specifically, the lower sealing mechanism 8 includes a lifting frame 801, a positioning rod 802, a buffer spring 803, and a lower sealing assembly 804. The lifting frame 801 has an inverted T-shaped structure. The lower ends of the lifting frame 801 are connected to the base 1 via symmetrically arranged positioning rods 802. The top of the lifting frame 801 passes through a sealing element 601 and a buffer spring 803 located in the middle of the test water tank 6, connecting to the lower end of the lower sealing assembly 804. The lower sealing assembly 804 is slidably connected to guide rails 602 corresponding to those inside the test water tank 6. The lower sealing assembly 804 seals the lower connection port of the cryogenic shut-off valve. Then, under the pressure of the cryogenic shut-off valve and the upper sealing mechanism 5, the lower sealing assembly 804 moves downwards on both sides under the action of the guide rails 602, simultaneously compressing the buffer spring 803. Then, guided by the positioning rods 802, the lifting frame 801 shortens the distance between itself and the base 1, ensuring the cryogenic shut-off valve is fully positioned in the test water tank 6 and in full contact with the liquid, thus facilitating airtightness testing. Component 804 includes a lower positioning plate 8041, with a lower locking frame 8042 threadedly connected to the upper center of the lower positioning plate 8041. A rubber air cushion 8043 is disposed inside the lower locking frame 8042. The rubber air cushion 8043 has a ring-shaped structure, and its lower ends are connected to an air pump 8044 and a vacuum pump 8045 respectively via connecting pipes. The other ends of the air pump 8044 and the vacuum pump 8045 are connected via a three-way connector 8046, which is located on the lower positioning plate 804. The positioning hole in the center of the front panel allows external air to be supplied to the rubber air cushion 8043 via the air pump 8044 and the three-way connector 8046, causing the rubber air cushion 8043 to expand and improve the sealing of the lower connection port of the cryogenic shut-off valve. The air pump 8045 allows the gas inside the rubber air cushion 8043 to be discharged through the three-way connector 8046, causing the rubber air cushion 8043 to retract. This facilitates sealing of the lower connection port of cryogenic shut-off valves of different sizes, improving its practicality.

[0025] In use, place the lower connection port of the cryogenic shut-off valve in the middle of the rubber air cushion 8043. Then, start the air pump 8044 to deliver external air to the inside of the rubber air cushion 8043 through the three-way connector 8046, causing the rubber air cushion 8043 to inflate and seal against the outside of the lower connection port of the cryogenic shut-off valve. Next, the detection component 5035 causes the electric linear guide rail 501 to drive the electric hydraulic cylinder 502 and the upper sealing component 503 to move until the position of the upper sealing component 503 is opposite to the position of the top connection port of the cryogenic shut-off valve. Then, start the electric hydraulic cylinder 502 to push the upper sealing component 503 downward, so that the elastic rubber sleeve 5033 of the top connection port of the cryogenic shut-off valve is in contact with the cryogenic valve. The top of the valve's connection port is aligned with the lower end of the sealing cap 5034. After alignment and sealing, the cryogenic valve is located inside the test tank 6. Then, the pump 901 is started to transfer the liquid inside the storage tank 11 to the test tank 6 through the pumping pipe 9, immersing the cryogenic valve in the liquid. Next, the metered air pump 505 is started to transfer external air to the cryogenic valve through the air supply pipe 504 to test its airtightness. If no bubbles are generated in the liquid, it indicates that the cryogenic valve has good sealing performance; otherwise, it indicates that the cryogenic valve has poor sealing performance. After the test is completed, the pump 1001 is started to transfer the liquid inside the test tank 6 to the storage tank 11 through the delivery pipe 10.

[0026] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A detection device for a cryogenic shut-off valve with an automatic alignment and sealing structure, comprising a base (1), characterized in that: The upper middle of the base (1) is connected to the lower rear side of the top plate (3) via a support plate (2), and the lower front side of the top plate (3) is connected to the upper front of the support plate (2) via symmetrically arranged reinforcing rods (4). At the same time, an upper sealing mechanism (5) is provided in the middle of the lower end of the top plate (3). The upper sealing mechanism (5) includes an electric linear guide (501), an electric hydraulic cylinder (502), and an upper sealing assembly (503). There are two symmetrically arranged electric linear guides (501), and the lower ends of the two electric linear guides (501) are connected via a support plate (2). The electric hydraulic cylinder (502) and the upper sealing assembly (503) are connected on the upper side. The upper sealing assembly (503) is connected to the quantitative air pump (505) through the air supply pipe (504) through the support plate (2). The bottom sides of the detection water tank (6) below the upper sealing mechanism (5) are connected to the upper end of the base (1) through the support frame (7). The lower sealing mechanism (8) is set in the middle of the detection water tank (6). The position of the lower sealing mechanism (8) is corresponding to the position of the upper sealing mechanism (5).

2. The detection device for a cryogenic shut-off valve with an automatic alignment and sealing structure as described in claim 1, characterized in that: The upper sealing assembly (503) includes an upper positioning plate (5031), and an upper locking frame (5032) is threadedly connected to the lower middle of the upper positioning plate (5031). An elastic rubber sleeve (5033) is provided inside the upper locking frame (5032). A sealing cover (5034) is provided on the upper inner side of the elastic rubber sleeve (5033), and a detection assembly (5035) is provided on the inner lower side of the sealing cover (5034). The top of the air inlet head (5036) provided in the sealing cover (5034) is detachably connected to the lower end of the air supply pipe (504).

3. The detection device for a cryogenic shut-off valve with an automatic alignment and sealing structure as described in claim 2, characterized in that: The detection component (5035) includes a laser rangefinder and an image recognition camera.

4. The detection device for a cryogenic shut-off valve with an automatic alignment and sealing structure as described in claim 1, characterized in that: The lower ends of the two sides of the test water tank (6) are respectively provided with a liquid extraction pipe (9) and a liquid delivery pipe (10), and a liquid extraction pump (901) and a liquid delivery pump (1001) are provided on the liquid extraction pipe (9) and the liquid delivery pipe (10). At the same time, the other end of the liquid extraction pipe (9) and the liquid delivery pipe (10) are connected to the liquid storage tank (11) provided on the rear side of the upper end of the base (1).

5. The detection device for a cryogenic shut-off valve with an automatic alignment and sealing structure as described in claim 1, characterized in that: The lower sealing mechanism (8) includes a lifting frame (801), a positioning rod (802), a buffer spring (803), and a lower sealing assembly (804). The lifting frame (801) has an inverted T-shaped structure. The lower ends of the lifting frame (801) are connected to the base (1) through symmetrically arranged positioning rods (802). The top of the lifting frame (801) passes through the sealing element (601) and buffer spring (803) arranged in the middle of the detection water tank (6) and is connected to the lower end of the lower sealing assembly (804). The two sides of the lower sealing assembly (804) are slidably connected to the guide rails (602) arranged inside the detection water tank (6).

6. The detection device for a cryogenic shut-off valve with an automatic alignment and sealing structure as described in claim 5, characterized in that: The lower sealing assembly (804) includes a lower positioning plate (8041), and a lower locking frame (8042) is threadedly connected to the middle of the upper end of the lower positioning plate (8041). At the same time, a rubber air cushion (8043) is provided on the inner side of the lower locking frame (8042). The rubber air cushion (8043) has a ring structure, and the two sides of the lower end of the rubber air cushion (8043) are respectively connected to an air pump (8044) and an air pump (8045) through connecting pipes. At the same time, the other ends of the air pump (8044) and the air pump (8045) are connected through a three-way connector (8046). The three-way connector (8046) is connected to the positioning hole opened in the middle of the front of the lower positioning plate (8041).

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