Sealing locking device

Abstract

The name of the utility model is a sealing locking device. It belongs to the technical field of auxiliary sealing devices for airtightness detection. It mainly solves the problem that the structure of some products is difficult to use external compression or the compression effect is poor. Its main features are: it is composed of a sealing plate and a compression mechanism; the side wall of the sealing plate is provided with a sealing plate stopper; the sealing plate is provided with a cavity air inlet hole and a sealing plate exhaust hole; the compression mechanism is composed of a first fixed rod, a pressure plate, a connecting rod, a tension spring and a cylinder, the first fixed rod and the bottom of the cylinder are fixed on the sealing plate, the top is connected to the middle of the pressure plate through a swivel pin, a pressure plate pressure head is provided at one end of the pressure plate, and the other end of the pressure plate is connected to the cylinder pull rod through a connecting rod; the tension spring is arranged in the lower air chamber of the cylinder; the cylinder air outlet of the cylinder is connected to the exhaust hole of the sealing plate. The utility model has the characteristics of simple structure, low manufacturing cost, convenient and quick installation, wide adaptability and effective application, and is mainly used for airtightness detection of products with sealed cavities.

Description

Technical Field

[0001] The utility model belongs to the technical field of airtightness detection auxiliary sealing devices, and in particular relates to a sealing locking device. Background Art

[0002] As the requirements for sealing in the manufacturing industry increase, more and more products need to be tested for airtightness.

[0003] In the transmission airtight method, some structures can be sealed by externally pressing the sealing plate and the product. However, the structure of some products is difficult to use external compression or the compression effect is poor. Such traditional airtight detection methods can only use screws to fix the sealing plate and the product, and the pressure test efficiency is low. Summary of the invention

[0004] The purpose of the utility model is to provide an efficient and convenient sealing locking device in view of the above-mentioned deficiencies in the prior art, which has the characteristics of easy observation and adjustment, reliable use, and convenient maintenance.

[0005] The technical solution of the utility model is: a sealing locking device, characterized in that: it is composed of a sealing plate and a clamping mechanism; wherein the side wall of the sealing plate is provided with a sealing plate stop that cooperates with the workpiece stop having a sealing cavity; the sealing plate is provided with a cavity air inlet hole and a sealing plate exhaust hole; the clamping mechanism is composed of a first fixed rod, a pressure plate, a connecting rod, a tension spring and a cylinder, the bottom of the first fixed rod and the cylinder are fixed on the sealing plate, the top is connected to the middle of the pressure plate by a turn pin, one end of the pressure plate is provided with a pressure plate pressure head that cooperates with the inner cavity of the workpiece, the other end of the pressure plate is connected to one end of one or more connecting rods by a turn pin, and one end of one or more connecting rods is connected to the pull rod of the cylinder by a turn pin; the tension spring is arranged in the lower air chamber of the cylinder; the upper air chamber of the cylinder is provided with a cylinder air outlet hole, the lower air chamber is provided with a cylinder air inlet hole, and the cylinder air outlet hole is connected to the sealing plate exhaust hole.

[0006] The technical solution of the utility model also includes a second fixed rod, the bottom of which is fixed on the cylinder or on the sealing plate; there are three connecting rods, one end of the three connecting rods is connected by a rotating pin, and the other end is connected to the pressure plate, the cylinder's pull rod and the top of the second fixed rod through the rotating pin.

[0007] The clamping mechanism described in the technical solution of the utility model includes multiple clamping mechanisms.

[0008] The clamping mechanism described in the technical solution of the utility model comprises two clamping mechanisms which are symmetrically distributed on the sealing plate.

[0009] The sealing plate stop of the sealing plate described in the technical solution of the utility model is provided with a sealing plate sealing ring matched with the stop of the workpiece.

[0010] The sealing plate stop described in the technical solution of the utility model is in a step-like shape; the sealing plate sealing ring is located at the vertical end surface of the sealing plate stop.

[0011] The cavity air inlet hole described in the technical solution of the utility model is located at the center of the sealing plate.

[0012] The cavity air inlet hole described in the technical solution of the utility model is a straight through hole perpendicular to the upper and lower surfaces of the sealing plate.

[0013] The sealing plate exhaust hole described in the technical solution of the utility model is a straight through hole perpendicular to the upper and lower surfaces of the sealing plate; the sealing plate exhaust hole and the cavity air inlet hole are provided with switch joints.

[0014] The technical solution of the utility model states that when the air inlet of the cavity is not pressurized, the pressures of the upper and lower cavities of the cylinder are balanced, and under the action of the tension spring, the cylinder pull rod is in a contracted state, and the pressure plate pressure head of the pressure plate is located above the inner side of the stopper of the sealing plate; when the air inlet of the cavity is pressurized, the cylinder pull rod is in an extended state, and the pressure plate pressure head of the pressure plate is in a compressed state with the inner cavity of the workpiece.

[0015] The beneficial effect of the utility model is that when the air inlet of the cavity is not pressurized, the utility model can be installed at the port of the product to be tested for air tightness, and the clamping mechanism is located in the cavity. By continuously pressurizing the air inlet of the cavity, the cylinder pull rod can be raised, and the pressing plate is driven to move through the connecting rod. The pressing plate head of the pressing plate contacts the end surface inside the product. With continuous pressure, the product moves up, the pressing plate is in a clamping state, and the product cannot continue to move up. The entire locking device completes the sealing and locking. The utility model overcomes the problem that some products have structures that are difficult to use external clamping or have poor clamping effects.

[0016] The utility model has the characteristics of simple structure, low manufacturing cost, convenient and quick installation, wide adaptability and effective application, and is mainly used for airtightness detection of products with sealed cavities. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The cross section of the utility model is shown in FIG. Figure 1 .

[0018] Figure 2 The cross section of the utility model is shown in FIG. Figure 2 .

[0019] Figure 3 It is a cross-sectional schematic diagram of the pressing plate of the utility model in the pressing state.

[0020] Figure 4 It is a cross-sectional schematic diagram of the utility model in a locked state.

[0021] Figure 5 It is a cross-sectional schematic diagram of the utility model when the pressing plate is retracted and the pressing state is released.

[0022] In the figure: 1-cavity air inlet hole; 2-sealing plate exhaust hole; 3-sealing plate; 4-sealing plate sealing ring; 5-clamping mechanism; 5-1-first fixing rod; 5-2-second fixing rod; 5-3-pressing plate; 5-4-connecting rod; 5-5-rotating pin; 5-6-tension spring; 5-7-cylinder air inlet hole; 6-workpiece. DETAILED DESCRIPTION

[0023] The following description is made in conjunction with the preferred embodiments of the present invention. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0024] The present invention is further described below in conjunction with specific embodiments. These embodiments should be understood to be only used to illustrate the present invention and not to limit the scope of protection of the present invention. After reading the contents of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

[0025] like Figures 1 to 5 As shown, an embodiment of a sealing locking device of the utility model is composed of a sealing plate 3, a sealing plate sealing ring 4 and a clamping mechanism 5. It also includes a pressed workpiece 6, which has a sealing cavity and a cylindrical through hole, the outer end of the cylindrical through hole is a stop end, and the inner end has an inner port plane.

[0026] The sealing plate 3 is in the shape of a disk, and the side wall is provided with a sealing plate stopper that matches the stopper of the workpiece 6. The sealing plate stopper is in a step shape, including a horizontal end and a cylindrical end face, and matches the stopper end of the workpiece 6. A cavity air inlet 1 is provided at the center of the sealing plate 3, and sealing plate exhaust holes 2 are symmetrically provided on both sides of the cavity air inlet 1. The cavity air inlet 1 and the two sealing plate exhaust holes 2 are straight through holes perpendicular to the upper and lower surfaces of the sealing plate 3. Switch connectors can also be provided on the sealing plate exhaust holes 2 and the cavity air inlet 1 to control the ventilation or closing of the air holes.

[0027] The sealing locking device may include two clamping mechanisms 5, and the two clamping mechanisms 5 are symmetrically distributed on the sealing plate 3. The clamping mechanism 5 includes a first fixed rod 5-1, a second fixed rod 5-2, a pressure plate 5-3, a connecting rod 5-4, a rotating pin 5-5, a tension spring 5-6 and a cylinder. Among them, the lower part of the first fixed rod 5-1 is fixed on the sealing plate 3 on the outside, and the upper part is connected to the middle part of the pressure plate 5-3 through the rotating pin 5-5. The bottom of the cylinder is fixed on the sealing plate 3 on the inner side of the first fixed rod 5-1. The bottom of the second fixed rod 5-2 is fixed to the cylinder or to the sealing plate 3. A pressure plate pressure head is provided at one end of the pressure plate 5-3, and the pressure plate pressure head cooperates with the inner port plane at the inner port of the workpiece 6. There are three connecting rods 5-4, one end of the three connecting rods 5-4 is connected by a rotating pin 5-5, and the other end is connected to the other end of the pressure plate 5-3, the pull rod of the cylinder and the upper part of the second fixed rod 5-2 through the rotating pin 5-5.

[0028] The cylinder has an upper and lower cavity, and the tension spring 5-6 is arranged in the lower cavity of the cylinder and connected between the piston and the bottom surface of the lower cavity. The upper cavity of the cylinder is provided with a cylinder air outlet, and the lower cavity is provided with a cylinder air inlet 5-7. Among them, the cylinder exhaust hole is connected to the sealing plate exhaust hole 2 through an air pipe, and the cylinder air inlet 5-7 is interconnected with the airtight cavity.

[0029] The sealing ring 4 of the sealing plate is an O-type sealing ring, which is located at the cylindrical end face of the stopper of the sealing plate and cooperates with the stopper end of the workpiece 6 to play a sealing role.

[0030] When the cavity air inlet hole 1 is not pressurized, the pressures in the upper and lower cavities of the cylinder are balanced. Under the action of the tension spring 5-6, the cylinder pull rod is in a retracted state, and the pressure plate pressure head of the pressure plate 5-3 is located above the inner side of the stopper of the sealing plate 3; when the cavity air inlet hole 1 is pressurized, the cylinder pull rod is in an extended state, and the pressure plate pressure head of the pressure plate 5-3 is in a tightened state with the inner cavity of the workpiece 6.

[0031] During use, the air inlet 1 of the cavity is not pressurized, the pressures of the upper and lower cavities of the cylinder are balanced, and under the action of the tension spring 5-6, the cylinder rod is in a contracted state, such as Figure 1 As shown, the connecting rod 5-4 at the bottom moves downward under the action of the cylinder pull rod contraction, and the pressing plate 5-3 is in a contracted state under the action of the three connecting rods 5-4. At this time, the workpiece stopper is buckled at the stopper of the sealing plate 3, and the stopper end face and the stopper end face of the sealing plate 3 are fitted.

[0032] The cavity air inlet 1 is pressurized, and the pressure in the workpiece 6 cavity and the cylinder air inlet 5-7 gradually increases. When the force of the cylinder pull rod rising is greater than the tension of the tension spring 5-6, the cylinder pull rod begins to rise; under the action of the pull rod force, the middle rotating pin 5-5 of the connecting rod 5-4 gradually exceeds the connecting line of the rotating pins 5-5 on both sides, and the pressure plate 5-3 is in a compressed state, that is, Figure 3 Status shown.

[0033] As the cavity air inlet 1 continues to be pressurized, the pressure in the cavity of the workpiece 6 and the cylinder air inlet 5-7 continues to increase. When the pressure is higher than a certain critical value, the workpiece 6 begins to move upward under the action of pressure. When the inner end face of the workpiece 6 contacts the pressing plate 5-3, the pressing plate 5-3 is in a clamped state, and the workpiece 6 cannot move further upward, and the entire locking device is locked. Figure 4 Status shown.

[0034] After the entire locking device is locked, since the middle rotating pin 5-5 is higher than the connecting line of the rotating pins 5-5 on both sides, even if the pressure continues to increase, the force transmitted from the pressing plate 5-3 to the connecting rod 5-4 will continue to push up the middle rotating pin 5-5, so the pressing plate 5-3 will still be in a compressed state, so the locking device is always effective. If it does not need to be released, the cavity air inlet 1 and the sealing plate exhaust hole 2 can be directly closed at this time, and the device can maintain a locked state for a long time.

[0035] When the locking state needs to be released, it is only necessary to reduce the pressure in the cavity, that is, the air in the cavity is pumped out through the cavity air inlet 1. When the pressure continues to drop to below atmospheric pressure, the air enters the cylinder through the sealing plate exhaust hole 2 and the cylinder exhaust hole under the action of pressure. Under the combined action of air pressure and tension spring 5-6, the cylinder pull rod gradually moves downward, and the pressure plate 5-3 is gradually retracted under the linkage of the three connecting rods 5-4. Figure 5 The state shown. At this time, due to the lack of intervention of the pressing plate 5-3, the workpiece 6 can be separated from the entire clamping device.

[0036] Those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.

Claims

1. A sealing locking device, characterized in that: The invention is composed of a sealing plate (3) and a clamping mechanism (5); wherein the side wall of the sealing plate (3) is provided with a sealing plate stopper matched with a stopper of a workpiece (6) having a sealing cavity; the sealing plate (3) is provided with a cavity air inlet hole (1) and a sealing plate air outlet hole (2); the clamping mechanism (5) is composed of a first fixing rod (5-1), a pressing plate (5-3), a connecting rod (5-4), a tension spring (5-6) and a cylinder; the first fixing rod (5-1) and the bottom of the cylinder are fixed on the sealing plate (3), and the top is connected to the pressing plate through a rotating pin (5-5). (5-3), one end of the pressure plate (5-3) is provided with a pressure plate pressure head that cooperates with the inner cavity of the workpiece (6), the other end of the pressure plate (5-3) is connected to one end of one or more connecting rods (5-4) through a rotating pin (5-5), and one end of one or more connecting rods (5-4) is connected to the pull rod of the cylinder through a rotating pin (5-5); the tension spring (5-6) is arranged in the lower air chamber of the cylinder; the upper air chamber of the cylinder is provided with a cylinder outlet hole, and the lower air chamber is provided with a cylinder inlet hole (5-7), and the cylinder outlet hole is connected to the exhaust hole (2) of the sealing plate.

2. A sealing and locking device according to claim 1, characterized in that: It also includes a second fixed rod (5-2), the bottom of which is fixed to the cylinder or to the sealing plate (3); there are three connecting rods (5-4), one end of the three connecting rods (5-4) is connected by a rotating pin (5-5), and the other end is respectively connected to the pressure plate (5-3), the cylinder's pull rod and the top of the second fixed rod (5-2) through the rotating pin (5-5).

3. A sealing and locking device according to claim 1 or 2, characterized in that: The clamping mechanism (5) comprises a plurality of clamping mechanisms.

4. A sealing and locking device according to claim 3, characterized in that: The clamping mechanism (5) comprises two clamping mechanisms, which are symmetrically distributed on the sealing plate (3).

5. A sealing and locking device according to claim 1, 2 or 4, characterized in that: The sealing plate stop of the sealing plate (3) is provided with a sealing plate sealing ring (4) which cooperates with the stop of the workpiece (6).

6. A sealing and locking device according to claim 5, characterized in that: The sealing plate stop is in a step shape; the sealing plate sealing ring (4) is located at the vertical end surface of the sealing plate stop.

7. A sealing and locking device according to any one of claims 1-2, 4 and 6, characterized in that: The cavity air inlet hole (1) is located at the center of the sealing plate (3).

8. A sealing and locking device according to claim 7, characterized in that: The cavity air inlet hole (1) is a straight through hole perpendicular to the upper and lower surfaces of the sealing plate (3).

9. A sealing and locking device according to any one of claims 1-2, 4, 6, and 8, characterized in that: The sealing plate exhaust hole (2) is a straight through hole perpendicular to the upper and lower surfaces of the sealing plate (3); and switch joints are provided on the sealing plate exhaust hole (2) and the cavity air inlet hole (1).

10. A sealing and locking device according to any one of claims 1-2, 4, 6, and 8, characterized in that: When the cavity air inlet (1) is not pressurized, the pressures in the upper and lower cavities of the cylinder are balanced, and under the action of the tension spring (5-6), the cylinder pull rod is in a retracted state, and the pressure plate head of the pressure plate (5-3) is located above the inner side of the stopper of the sealing plate (3); when the cavity air inlet (1) is pressurized, the cylinder pull rod is in an extended state, and the pressure plate head of the pressure plate (5-3) and the inner cavity of the workpiece (6) are in a compressed state.

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