Automatic clamping device for high pressure container

Abstract

An automatic clamping device for high-pressure containers belongs to the field of closed components. It includes two clamping plates, a limiting disk and a rotating disk; a rotating disk is arranged on the gland; a limiting disk is arranged on the rotating disk; a corresponding eccentric slide groove is arranged on the rotating disk; the clamping plate is slidably arranged between the gland and the limiting disk along the radial direction of the gland; a vertical sliding shaft is arranged at the tail of each clamping plate; the sliding shaft can be slidably clamped into the eccentric slide groove of the rotating disk; when the rotating disk rotates in one direction, the eccentric slide groove drives the clamping plate through the sliding shaft to move in an extended manner along the radial direction of the gland; when the rotating disk rotates in another direction, the eccentric slide groove drives the clamping plate through the sliding shaft to move in a retracted manner along the radial direction of the gland; the gland opening and closing functions are realized by retracting or extending the clamping plate. It is integrated with the gland, occupies a small space, can automatically compress the sealing ring between the gland and the high-pressure chamber, and realize the sealing effect between the opening end of the high-pressure chamber and the gland.

Description

Technical Field

[0001] The utility model belongs to the field of covers of pressure vessels or similar closing elements, and in particular relates to an automatic clamping device for a split high-pressure vessel. Background Art

[0002] Many high-pressure vessels require placing samples and adding solvents into the cavity, so the high-pressure vessels need to be made into split types.

[0003] Split high-pressure vessels are often composed of a high-pressure chamber and a gland. When the gland is closed, it is necessary to pressurize the high-pressure chamber or a chemical reaction occurs in the high-pressure chamber to generate a large pressure, so there are high requirements for the clamping device between the high-pressure chamber and the gland. When the pressure in the chamber is released to normal pressure, the gland needs to be opened to perform a series of operations.

[0004] With the advancement of science and technology and the development of industrial technology, people have higher and higher requirements for high-pressure containers. In particular, high-pressure containers used in automated instruments need to be split and automated. The capping needs to be closed and opened automatically, so the clamping device needs to have the function of automatic clamping and loosening.

[0005] The utility model with the authorization announcement date of 2018.04.17 and the authorization announcement number CN207246399U discloses "a clamping device" for clamping the tank body of a high-pressure container to prevent it from being opened accidentally. The clamping device includes a bracket, a clamping device and a driving assembly; the clamping device includes a first clamping part and a second clamping part, and the first clamping part and the second clamping part can be movably installed on the bracket along the arrangement direction of the first clamping part and the second clamping part; an interval for placing the high-pressure container is formed between the first clamping part and the second clamping part; when the first clamping part and the second clamping part are both in a clamping state, the clamp is used to clamp the tank body and the cover body of the high-pressure container, and when at least one of the first clamping part and the second clamping part is in a reset state, the clamp is released; the driving assembly is used to drive the first clamping part and the second clamping part to operate; the clamping device can prevent the high-pressure container from being opened accidentally. This technical solution is used to clamp the tank body of a high-pressure container to prevent it from being opened accidentally. Due to its large overall volume, it is suitable for clamping large high-pressure containers (such as high-pressure steel cylinders containing alignment liquid, which use high pressure to press the alignment liquid from the tank body of the high-pressure container into the liquid supply pipeline, see paragraph

[0002] of its specification), but cannot be used for automatic closing and opening of the cover between a small high-pressure cavity and a pressure cover, and cannot be used for automatic closing and opening of the cover between the tank body and the pressure cover of a digestion tank in the sample analysis field.

[0006] The invention patent with the authorization announcement date of 2017.04.19 and the authorization announcement number of CN105387205B discloses an "automatic locking device for the tank cover of a pressure tank", including a tank body of the pressure tank and a tank cover covering the opening of the tank body, more than three fixing seats are arranged at intervals on the outer wall of the tank body opening in a circumferential direction, the hinged part in the middle of the locking block is hinged to the fixing seat through a hinge shaft, the upper side of the locking block is provided with a locking hook, and the lower side is provided with a driving arm, the lower side of the driving arm is provided with a driving ring driven by a power device to move up and down and sleeved on the outer wall of the pressure tank, and the driving ring is provided with an inclined wedge block driving the driving arm to rotate around the hinge shaft; after the tank cover is covered on the opening of the tank body and the power device drives the driving ring and the inclined wedge block to move upward, the inclined wedge block drives the driving arm to rotate so that the locking hook of the locking block is clamped on the upper surface of the tank cover to realize automatic locking of the tank body and the tank cover, the tank body and the tank cover are automatically locked, and the locking stability is good and the friction is small, which is suitable for the automatic locking device between the tank body and the tank cover of a small pressure vessel. However, the automatic locking device of this technical solution is located as a whole outside the tank body of the pressure vessel, and the overall space required is relatively large, which cannot meet the use scenarios in the sample analysis field where the tank bodies and tank lids of multiple small pressure vessels (for example, dozens of digestion tanks) need to be closed and opened at the same time.

[0007] At present, the traditional automatic clamping device commonly used in the field of sample analysis consists of two left and right clamps, which clamp the flanges of the gland and the high-pressure chamber respectively, and achieve the sealing effect by compressing the sealing ring between the gland and the high-pressure chamber. If this traditional automatic clamping device uses the left and right clamps to automatically open and close, it often requires two sets of transmission devices, which is costly and takes up a lot of space for opening and closing.

[0008] Therefore, it is very necessary to design an automatic clamping device which is simple in structure, stable and reliable, low in cost and occupies little space. Utility Model Content

[0009] The technical problem to be solved by the utility model is to provide an automatic clamping device for high-pressure containers. The clamping device is integrated with the gland, and the degree of integration is high; only one set of clamping device is needed to realize the clamping and loosening functions of the clamping device; it occupies a small space, and can automatically clamp the sealing ring between the gland and the high-pressure cavity, thereby realizing the sealing effect between the opening end of the high-pressure cavity and the gland.

[0010] The technical solution of the utility model is to provide an automatic clamping device for a high-pressure container, comprising a gland, which is arranged at the open end of a high-pressure chamber body, and a sealing ring is arranged on the contact surface between the open end of the high-pressure chamber body and the gland; the characteristics are:

[0011] An automatic clamping device consisting of at least two clamping plates, a limiting disk and a rotating disk is arranged on the gland;

[0012] Wherein, a rotating disk is arranged on the pressure cover; the rotating disk has a rotating shaft; the rotating shaft is arranged perpendicular to the plane where the rotating disk is located;

[0013] A limit plate is arranged in parallel on the rotating plate;

[0014] The gland, rotating disk, rotating shaft and limiting disk are coaxially arranged;

[0015] On the rotating disk, there are eccentric slides corresponding to the number of the clamping plates;

[0016] The clamping plate is a flat tongue-shaped structure, which can be slidably arranged between the pressure cover and the limiting plate along the radial direction of the pressure cover; a vertical sliding shaft is arranged at the tail of each clamping plate; the sliding shaft can be slidably inserted into the eccentric sliding groove of the rotating disk;

[0017] When the rotating disk rotates in one direction, the eccentric slide groove drives the clamping plate through the sliding shaft to move in an extended manner along the radial direction of the gland;

[0018] When the rotating disk rotates in the other direction, the eccentric slide groove drives the clamping plate through the sliding shaft to retract along the radial direction of the gland;

[0019] The opening and closing functions of the pressure cover are realized by retracting or extending the clamping plate.

[0020] Furthermore, a first bearing is provided between the rotating shaft and the limiting plate; and a second bearing is provided between the rotating shaft and the pressure cover.

[0021] Furthermore, card guide grooves are radially arranged on the pressure cover or the limiting plate, and the number of the card guide grooves matches the number of the card plates.

[0022] Specifically, the central rotating shaft drives the rotating disk to rotate under the drive mechanism; the eccentric slide groove on the rotating disk drives the sliding shaft stuck in the eccentric slide groove of the rotating disk to move eccentrically, and then drives the clamping plate to slide along the radial direction of the pressure cover to extend or retract.

[0023] Furthermore, by the forward and reverse rotation of the driving mechanism connected to the rotating shaft, the clamping plate is driven to slide synchronously along the radial direction of the pressure cover, making a radial extension or retraction action similar to a lock tongue, thereby realizing the clamping and loosening action of the automatic clamping device.

[0024] Specifically, the driving mechanism includes a driving motor.

[0025] Specifically, multiple clamping plates are evenly arranged along the circumference of the pressure cover; correspondingly, multiple eccentric sliding grooves on the rotating disk are evenly arranged along the circumference of the pressure cover; when the rotating disk rotates forward or reverse, multiple clamping plates synchronously extend or retract.

[0026] Furthermore, an annular groove is provided at the open end of the high-pressure cavity; the position of the groove matches the position of the clamping plate.

[0027] When the card plate is extended, the front end of the card plate extends out and is embedded in the groove of the high-pressure cavity; the pressure cover is clamped at the open end of the high-pressure cavity, and the pressure cover realizes the pressure-bearing seal of the high-pressure cavity by pressing the sealing ring arranged at the open end of the high-pressure cavity, thereby realizing the closing function of the pressure cover.

[0028] When the card plate is retracted, the front end of the card plate is retracted from the groove of the high-pressure cavity, the pressure cover is disengaged from the sealing ring arranged at the opening end of the high-pressure cavity, and the pressure cover is moved away from the opening end of the high-pressure cavity, realizing the opening function of the pressure cover.

[0029] Compared with the prior art, the advantages of the utility model are:

[0030] 1. In this technical solution, the automatic clamping device is integrated with the pressure cover, and the degree of integration is high; in addition to the clamping function, the pressure cover can also support, guide and limit the multiple clamping plates in the automatic clamping device;

[0031] 2. In this technical solution, multiple clamping plates are evenly arranged to clamp the gland and the high-pressure chamber, so that the pressure applied by the gland to the sealing ring is uniform;

[0032] 3. Due to the eccentric design and uniform distribution of the slide grooves on the rotating disk, the technical solution only needs one set of driving devices to drive the rotating disk to rotate forward or reverse, so as to realize the clamping and loosening of the clamping device (which is specifically manifested as the extension or retraction of the clamping plate, similar to the simultaneous radial extension or retraction of multiple lock tongue structures); moreover, due to the uniform distribution design of multiple eccentric slide grooves on the rotating disk, when the rotating disk rotates forward or reverse, it drives multiple clamping plates to open and close at the same time, and only one set of driving devices is needed to realize the clamping and loosening of the clamping device, which saves costs;

[0033] 4. Since the automatic clamping device on the gland corresponds to the opening of the high-pressure chamber, it does not take up extra space. When multiple clamps are opened, they are embedded in the grooves of the high-pressure chamber, which can save a lot of space. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a cross-sectional structural schematic diagram of the automatic clamping device of the utility model;

[0035] Figure 2 It is a structural schematic diagram of the automatic clamping device of the utility model when the clamping plates are in a simultaneously closed state.

[0036] Figure 3 It is a structural schematic diagram of the automatic clamping device of the utility model when the clamping plates are simultaneously opened.

[0037] Figure 4 It is a schematic cross-sectional view of the automatic clamping device of the utility model when it is applied to a high-pressure chamber.

[0038] In the figure, 1 is an automatic clamping device, 1-1 is a pressure cover, 1-1a is a cardboard guide groove, 1-2 is a cardboard, 1-2-1 is a sliding shaft on the cardboard, 1-3 is a limit plate, 1-4 is a rotating plate, 1-4-1 is a rotating shaft on the rotating plate, 1-4-2 is an eccentric slide groove on the rotating plate, 1-5 is a first bearing, 1-6 is a second bearing, 2 is a high-pressure chamber, 2-1 is a groove, and 3 is a sealing ring. DETAILED DESCRIPTION

[0039] The utility model is further described below in conjunction with the accompanying drawings.

[0040] Figure 1 In the present invention, the technical solution is as follows:

[0041] The automatic clamping device for high-pressure containers is composed of a gland 1-1, a plurality of clamping plates 1-2, a limit plate 1-3, a rotating plate 1-4, a first bearing 1-5 (also called a large bearing), and a second bearing 1-6 (also called a small bearing).

[0042] The pressure cover 1-1 and the automatic clamping device are integrated into one body, and the limit plate 1-3 is fixed on the pressure cover 1-1 by means of screws or the like, so as to limit the upper and lower positions of the clamping plate 1-2.

[0043] When the rotating disk 1-4 rotates, the first bearing 1-5 mounted on the rotating shaft 1-4-1 of the rotating disk and the second bearing 1-6 mounted on the top of the rotating shaft 1-4-1 play a role in reducing friction.

[0044] Specifically, Figure 2 , Figure 3 As shown in the figure, a plurality of eccentric grooves 1-4-2 are evenly distributed on the rotating disk 1-4, a plurality of clamping plates 1-2 are evenly distributed on the pressure cover 1-1, and a sliding shaft 1-2-1 arranged at the end of the clamping plate is clamped in the eccentric groove 1-4-2 on the rotating disk.

[0045] Card guide grooves 1-1a are radially arranged on the pressure cover or the limiting plate. The number of the card guide grooves matches the number of the card plates and is used to guide and limit the movement direction of the card plates.

[0046] There is an angle of 90 degrees between the card plate and the sliding shaft, that is, the sliding shaft is arranged perpendicular to the plane where the card plate is located.

[0047] The rotating shaft 1-4-1 is driven by a driving mechanism such as a motor to rotate the rotating disk, and the eccentric groove 1-4-2 on the rotating disk drives the sliding shaft 1-2-1 stuck in the eccentric groove of the rotating disk to move eccentrically, thereby driving the card plate 1-2 to slide along the radial direction of the pressure cover under the guidance and restriction of the card plate guide groove 1-1a, and perform an opening (extending) or retracting (retracting) action.

[0048] Through the forward and reverse rotation of the driving mechanism, multiple clamping plates 1-2 (along the radial direction of the pressure cover) are driven to slide synchronously, making radial extension or retraction actions similar to lock tongues, thereby realizing the opening and closing functions of the pressure cover.

[0049] like Figure 3 As shown, if multiple clamping plates 1-2 are extended at the same time, the extended parts thereof are embedded in the grooves in the high-pressure chamber 2, and the gland 1-1 can press the sealing ring 3, thereby playing a sealing role between the high-pressure chamber 1 and the gland 1-1.

[0050] like Figure 4 As shown, when the pressure cover is in the closed state, several clamping plates 1-2 in the automatic clamping device 1 are opened at the same time (similar to the extension action of the lock tongue), and extend into the groove 2-1 in the high-pressure chamber 2, thereby realizing the closing function of the pressure cover.

[0051] like Figure 2 As shown, when a plurality of clamping plates 1-2 are radially retracted at the same time (similar to the retraction action of the locking tongue), the entire automatic clamping device 1 can be moved upward to realize the cover opening function of the pressing cover.

[0052] After adopting the above structure, it is only necessary to connect the output shaft of the driving device (usually an electric motor) to the rotating shaft. By controlling the driving device, the automatic closing or opening function between the high-pressure container and the pressure cover can be realized, thereby meeting the need in the field of sample analysis to close and open the tank bodies and tank covers of multiple small pressure containers (for example, dozens of digestion tanks) at the same time.

[0053] In summary, compared with the existing traditional automatic clamping device, the technical solution of the utility model has the following advantages:

[0054] 1) The automatic clamping device is integrated with the pressure cover, with a high degree of integration; in addition to the clamping function, the pressure cover can also support, guide and limit the multiple clamping plates in the automatic clamping device.

[0055] 2) Multiple clamping plates are evenly arranged to clamp the gland and the high-pressure chamber, so that the pressure applied by the gland to the sealing ring is uniform.

[0056] 3) Due to the eccentric design of the slide groove on the rotating disk, only one set of driving device is needed to drive the rotating disk to rotate forward or reverse, so as to realize the clamping and loosening action of the clamping device; moreover, due to the structural design of multiple eccentric slide grooves evenly distributed on the rotating disk, when the rotating disk rotates forward or reverse, multiple clamping plates can realize the opening and closing action synchronously, thus saving costs.

[0057] 4) The entire automatic clamping device is located on the gland (i.e., the open end of the high-pressure chamber), and no additional space is required around the high-pressure chamber. For scenarios where multiple high-pressure containers are used at the same time, a lot of space can be saved, and it is particularly suitable for scenarios where multiple split high-pressure containers are used at the same time.

[0058] The utility model can be widely used in the design and manufacturing field of split high-pressure containers, especially automatic locking devices of high-pressure containers placed in automated analytical instruments.

Claims

1. An automatic clamping device for a high-pressure container, comprising a gland, wherein the gland is arranged at the open end of a high-pressure chamber body, and a sealing ring is arranged on the contact surface between the open end of the high-pressure chamber body and the gland; wherein: An automatic clamping device consisting of at least two clamping plates, a limiting disk and a rotating disk is arranged on the gland; Wherein, a rotating disk is arranged on the gland; The rotating disk has a rotating shaft; the rotating shaft is arranged perpendicular to the plane where the rotating disk is located; A limit plate is arranged in parallel on the rotating plate; The gland, rotating disk, rotating shaft and limiting disk are coaxially arranged; On the rotating disk, there are eccentric slides corresponding to the number of the clamping plates; The clamping plate is a flat tongue-shaped structure and can be slidably arranged between the gland and the limiting plate along the radial direction of the gland; A vertical sliding shaft is provided at the tail of each pallet; The sliding shaft can be slidably inserted into the eccentric sliding groove of the rotating disk; When the rotating disk rotates in one direction, the eccentric slide groove drives the clamping plate through the sliding shaft to move in an extended manner along the radial direction of the gland; When the rotating disk rotates in the other direction, the eccentric slide groove drives the clamping plate through the sliding shaft to retract along the radial direction of the gland; The opening and closing functions of the pressure cover are realized by retracting or extending the clamping plate.

2. The automatic clamping device for a high pressure container according to claim 1, characterized in that A first bearing is provided between the rotating shaft and the limiting plate; A second bearing is sleeved between the rotating shaft and the pressure cover.

3. The automatic clamping device for a high pressure container according to claim 1, characterized in that Card plate guide grooves are radially arranged on the pressure cover or the limiting disk, and the number of the card plate guide grooves matches the number of the card plates.

4. The automatic clamping device for a high pressure container according to claim 1, characterized in that The rotating shaft drives the rotating disk to rotate under the drive mechanism; The eccentric sliding groove on the rotating disk drives the sliding shaft stuck in the eccentric sliding groove of the rotating disk to move eccentrically, thereby driving the clamping plate to slide along the radial direction of the pressure cover to extend or retract.

5. The automatic clamping device for a high pressure container according to claim 1, characterized in that By the forward and reverse rotation of the driving mechanism connected to the rotating shaft, the clamping plate is driven to slide synchronously along the radial direction of the pressure cover, making a radial extension or retraction action similar to a lock tongue, thereby realizing the clamping and loosening action of the automatic clamping device.

6. The automatic clamping device for a high pressure container according to claim 4 or 5, characterized in that The driving mechanism comprises a driving motor.

7. The automatic clamping device for a high pressure container according to claim 1, characterized in that Along the circumference of the gland, multiple pallets are evenly arranged; Correspondingly, along the circumference of the gland, the eccentric slide grooves on the multiple rotating disks are evenly arranged; When the rotating disk rotates forward or reverse, multiple clamps are extended or retracted synchronously.

8. The automatic clamping device for high pressure containers according to claim 1, characterized in that The opening end of the high-pressure chamber body is provided with an annular groove; The position of the groove matches the position of the clamping plate.

9. The automatic clamping device for a high pressure container according to claim 1 or 8, characterized in that When the card plate is extended, the front end of the card plate extends out and is embedded in the groove of the high-pressure chamber body; the pressure cover is clamped at the open end of the high-pressure chamber body, and the pressure cover realizes the pressure-bearing seal of the high-pressure chamber by pressing the sealing ring arranged at the open end of the high-pressure chamber body, thereby realizing the closing function of the pressure cover.

10. The automatic clamping device for a high pressure container according to claim 1 or 8, characterized in that When the card plate is retracted, the front end of the card plate is retracted from the groove of the high-pressure chamber body, the pressure cover is disengaged from the sealing ring arranged at the open end of the high-pressure chamber body, and the pressure cover is moved away from the open end of the high-pressure chamber body to realize the opening function of the pressure cover.

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