Finished rubber sealing ring air tightness detection device

Abstract

The invention discloses an air tightness detection device for a finished rubber sealing ring, and relates to the technical field of sealing performance detection of rubber sealing rings. When the sealing device is used, the sealing ring is placed on the first structural part, then the second structural part is controlled to be installed on the first structural part in a matched mode, and the first structural part, the sealing ring and the second structural part are matched to form a closed space; then, a whole composed of the first structural part, the sealing ring and the second structural part is put into a negative pressure tank internally provided with a gas sensor, then the pricking needle is controlled to move to puncture the air bag after completion, the marking gas stored in the puncturing air bag is released, and whether the marking gas escapes into the negative pressure tank or not is detected through the gas sensor; air tightness detection and judgment of the sealing ring are completed; and a negative pressure environment is formed in the negative pressure tank under the control of the negative pressure device.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber sealing ring sealing performance detection, and in particular relates to a finished product rubber sealing ring air tightness detection device. Background Art

[0002] The sealing performance testing device is a device for testing the sealing performance of rubber sealing rings. The sealing performance testing device is widely used in various industries such as automobile cylinders, pistons, petroleum, coal mines, hoses, pressure gauges, gas tanks, etc. where gas pressurization and air tightness tests are required. The sealing performance testing device can detect rubber sealing rings to ensure the product quality of rubber sealing rings.

[0003] For example, the patent document with the Chinese announcement number CN216207308U discloses: an air tightness detection device for a rubber seal for a water pump, comprising a workbench, a support frame is fixedly installed on the workbench, a sealing cover is suspended inside the support frame through a telescopic device, a micro air pump is fixedly installed on the upper wall of the support frame, a water storage tank is provided on the upper wall of the workbench at the position corresponding to the sealing cover, a placement block is fixedly installed inside the water storage tank through a cylindrical block, a fixing groove is provided on the upper wall of the placement block, and four exhaust holes are equidistantly provided on the inner bottom surface of the fixing groove. When in use, the sealing cover is driven by driving the telescopic device to cover the placement block, and then water is injected into the water storage tank, and then the micro air pump is used to inflate the inside of the sealing cover. At this time, if bubbles are generated inside the water storage tank, the seal is unqualified, otherwise the seal is qualified, thereby achieving the effect of quickly detecting whether the seal is airtight or not. This method of observing whether bubbles are generated by naked eyes is easy to cause excessive use of eyes, and when replacing the seal to be tested, the sealing cover and the placement block need to be dried before use, which affects the detection efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide an air tightness detection device for a finished rubber sealing ring. When in use, the sealing ring is placed on a first structural member, and then the second structural member is controlled to be installed on the first structural member in coordination. The first structural member, the sealing ring and the second structural member cooperate to form an enclosed space; then the entire device consisting of the first structural member, the sealing ring and the second structural member is placed in a negative pressure tank with a gas sensor disposed therein, and then after completion, the needle is controlled to puncture the airbag to release the marking gas stored in the punctured airbag, and the gas sensor is used to detect whether the marking gas escapes into the negative pressure tank to complete the air tightness detection of the sealing ring.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a finished rubber sealing ring air tightness detection device, comprising a first structural member and a second structural member matched with the first structural member; the first structural member comprises a base, a boss is arranged on the upper surface of the base, a stud A is arranged on the boss, and a truncated cone-shaped guide column is threadedly connected to the stud A; the top of the guide column is recessed downward to form a groove A, the bottom side surface of the groove A is recessed to form a groove B, and the bottom side surface of the groove B is provided with a threaded hole threadedly connected to the stud A; the bottom side surface of the groove B passes through an elastic telescopic member, and the end of the elastic telescopic member is connected with a movable plate that slides along the inner wall of the groove B in a sealing manner, a needle is arranged on the top of the movable plate, a movable support ring is arranged on the bottom side surface of the groove A, a threaded portion is arranged at the open end of the groove A, and a top plate with an opening is threadedly connected on the threaded portion, and an airbag filled with marking gas is placed in the groove A between the support ring and the top plate; an electromagnet A is arranged on the top of the stud A, and a magnet A matched with the electromagnet A is embedded in the movable plate;

[0007] When in use, the sealing ring is placed on the first structural member, and then the second structural member is controlled to be installed on the first structural member; then the whole consisting of the first structural member, the sealing ring and the second structural member is placed in a negative pressure tank with a gas sensor arranged inside, and the negative pressure tank is connected to the negative pressure device; the first structural member, the sealing ring and the second structural member cooperate to form a closed space.

[0008] Furthermore, the marking gas is selected from one or more of nitrogen dioxide, carbon dioxide, carbon monoxide, hydrogen sulfide or methane.

[0009] Furthermore, the second structural member comprises a cylinder, a flange is arranged at the end of the cylinder, and a positioning column is arranged on the flange; and a positioning hole for inserting the positioning column is arranged on the upper surface of the base located on the peripheral side of the sealing ring.

[0010] Furthermore, a channel is arranged on the boss and the stud A, an opening end of the channel is arranged on the top of the stud A, and the other opening end is arranged on the side wall of the boss.

[0011] Furthermore, the peripheral side wall of the boss is provided with an inwardly recessed cavity, and the inner wall of the cavity is connected to a push block that slides along the inner wall of the cavity through a guiding elastic telescopic rod; an electromagnet B is arranged in the cavity, and a magnet B that cooperates with the electromagnet B is installed on the inner wall of the push block.

[0012] Furthermore, it also includes a fixing member for pressing the first structural member and the second structural member together; the fixing member includes a base, the upper surface of the base is connected to a fixing frame via a connecting column, and the fixing frame is threadedly connected with an adjusting bolt for controlling the first structural member and the second structural member to approach each other.

[0013] Furthermore, four protrusions for fixing the connecting column are arranged on the circumferential side of the base, a limiting plate is arranged on the top of the connecting column, a stud B is arranged on the limiting plate, and a nut is threadedly connected to the stud B; the fixing frame includes a base plate with an adjusting bolt threadedly connected in the middle, four extension arms are arranged on the circumferential side of the base plate, and through holes for the stud B to pass through are arranged at the ends of the extension arms.

[0014] Furthermore, the end of the adjusting bolt abuts against a positioning seat set on the top of the second structural member, and the upper surface of the positioning seat is provided with four guide rods respectively penetrating four extension arms, and the ends of the guide rods are connected to the limiting blocks; the upper surface of the base is provided with a limiting groove that cooperates with the first structural member.

[0015] The present invention has the following beneficial effects:

[0016] When the present invention is used, the sealing ring is placed on the first structural member, and then the second structural member is controlled to be installed on the first structural member, and then the whole composed of the first structural member, the sealing ring and the second structural member is placed in a negative pressure tank with a gas sensor arranged inside. After completion, the needle is controlled to puncture the airbag to release the marking gas stored in the punctured airbag, and the gas sensor is used to detect whether the marking gas escapes into the negative pressure tank to complete the air tightness detection of the sealing ring.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the first structural member of the present invention;

[0020] Figure 2 for Figure 1 Main view;

[0021] Figure 3 for Figure 2 Sectional view at AA;

[0022] Figure 4 for Figure 2 Sectional view at the middle BB;

[0023] Figure 5 This is a schematic diagram of the structure of the second structural member of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the airtightness detection device of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] See also Figure 1-5 As shown, the present invention is a finished rubber sealing ring air tightness detection device, comprising a first structural member 1 and a second structural member 2 for fixing and clamping the sealing ring 100. The first structural member 1, the sealing ring 100 and the second structural member 2 cooperate to form a closed space, and an airbag 19 and a puncture mechanism for puncturing the airbag 19 are placed in the formed closed space when in use. After the sealing ring 100 is installed, the air tightness detection device is placed in a negative pressure tank with a gas sensor disposed therein, and the negative pressure tank is connected to the negative pressure device, and the negative pressure device uses a negative pressure vacuum pump. After the negative pressure tank is controlled to form a seal, the negative pressure device is used to control the negative pressure tank to form a negative pressure environment, and the puncture mechanism is controlled to puncture the airbag 19. After a period of time, the gas sensor is used to detect whether there is a marker gas escaping from the negative pressure tank; when the gas sensor detects the marker gas, it is determined that the sealing ring 100 has not achieved sealing, and conversely, when the gas sensor does not detect the marker gas, it is determined that the sealing ring 100 has achieved sealing.

[0028] On the basis of the above, in order to facilitate the use of the airtightness detection device composed of the first structural member 1 and the second structural member 2, and to control the replacement of the airbag 19 when in use, and to use the puncture mechanism to puncture the airbag 19, the first structural member 1 provided by the present invention includes a base 10, a boss 11 is arranged on the upper surface of the base 10, a stud A13 is arranged on the boss 11, and a truncated cone-shaped guide column 14 is threadedly connected to the stud A13; the top of the guide column 14 is concave downward to form a groove A1 5. The bottom side of the groove A15 is recessed with a groove B151, and the bottom side of the groove B151 is provided with a threaded hole 152 threadedly connected to the stud A13; the bottom side of the groove B151 passes through an elastic telescopic member 16, and the end of the elastic telescopic member 16 is connected to a movable plate 161 that slides along the inner wall of the groove B151 in a sealed manner, and a needle 162 is arranged on the top of the movable plate 161. A movable support ring 17 is arranged on the bottom side of the groove A15, and a threaded portion is arranged at the open end of the groove A15, and a screw thread is arranged on the threaded portion. The top plate 18 with an opening 181 is connected with the support ring 17, and an airbag 19 filled with marking gas is placed in the groove A15 between the support ring 17 and the top plate 18; an electromagnet A131 is arranged on the top of the stud A13, and a magnet A matched with the electromagnet A131 is embedded in the movable plate 161; and when in use, after the first structural member 1 and the second structural member 2 are assembled, when it is necessary to puncture the airbag 19, the electromagnet A131 is controlled to be powered on, and at this time, the electromagnet A131 and the magnet A produce The movable plate 161 is driven to move upward until the tip of the needle 162 pierces the airbag 19, and the marking gas stored in the airbag 19 is released into the confined space. At the same time, in order to control the marking gas from escaping from the confined space to the negative pressure tank under the premise of poor sealing performance of the sealing ring 100, a negative pressure condition is formed in the negative pressure tank through a negative pressure vacuum pump during detection, so as to facilitate the use of air pressure to accelerate the escape of the marking gas from the confined space into the negative pressure tank.

[0029] At the same time, when the control electromagnet A131 is powered off, under the attraction between the electromagnet A131 and the magnet A and the action of the elastic member 16, the elastic member 16 contracts and the movable plate 161 moves downward toward the side away from the airbag 19.

[0030] It can be known that, in order to facilitate the rapid release of the controlled marking gas from the groove A15 into the enclosed space formed by the first structural member 1 and the second structural member 2 after puncturing the airbag 19 during use, the electromagnet A131 is controlled to perform a power-on-power-off-power-on cycle operation to increase the air pressure above the movable plate 161, thereby facilitating the acceleration of the control of the marking gas from the groove A15 to the enclosed space.

[0031] In order to facilitate the assembly of the first structural member 1 and the second structural member 2 during use, Figure 5As shown, the second structural member 2 includes a cylinder 20, a flange 21 is provided at the end of the cylinder 20, and a positioning column 22 is provided on the flange 21; a positioning hole 12 for inserting the positioning column 22 is provided on the upper surface of the base 10 located on the peripheral side of the sealing ring 100.

[0032] Specifically, when carbon dioxide gas is selected as the marking gas, the gas sensor is selected as a carbon dioxide sensor; or when carbon dioxide gas mixed with hydrogen sulfide is selected as the marking gas, the gas sensor is selected as a carbon dioxide sensor, and when in use, the gas leakage can be determined not only by the carbon dioxide sensor, but also by the smell.

[0033] A channel 110 is provided on the boss 11 and the stud A13 , an opening end of the channel 110 is provided on the top of the stud A13 , and the other opening end is provided on the side wall of the boss 11 .

[0034] It can be known that, in order to facilitate the placement of the sealing ring 100 on the upper surface of the base 10 and to position the sealing ring 100 after placement, a concave cavity 111 is provided on the peripheral side wall of the boss 11, and a push block 112 that slides along the inner wall of the concave cavity 111 is connected to the inner wall of the concave cavity 111 through a guiding elastic telescopic rod 113; an electromagnet B115 is provided in the concave cavity 111, and a magnet B114 that cooperates with the electromagnet B115 is installed on the inner wall of the push block 112, and then When in use, the sealing ring 100 is inserted from the top of the guide column 14 until the sealing ring 100 is placed on the upper surface of the base 10. At this time, the control electromagnet B115 is energized, and the electromagnet B115 and the magnet B114 produce repulsion, and the push block 112 is driven to move outward, thereby controlling the sealing ring 100 to be tensioned and positioned; conversely, when the electromagnet B115 is de-energized, the guide elastic telescopic rod 113 contracts to drive the push block 112 to contract into the concave cavity 111.

[0035] Specifically, in order to facilitate use, after the first structural member 1 and the second structural member 2 are used to clamp and fix the surface sealing ring 100 placed on the base 10, Figure 6, and a fixing member for pressing the first structural member 1 and the second structural member 2 together is also provided; the fixing member includes a base 3, the upper surface of the base 3 is connected to a fixing frame through a connecting column 33, and the fixing frame is threadedly connected with an adjusting bolt 40 for controlling the first structural member 1 and the second structural member 2 to approach each other; four protrusions 32 for fixing the connecting column 33 are provided on the peripheral side of the base 3, and a limiting plate 34 is provided on the top of the connecting column 33, and a stud B35 is provided on the limiting plate 34, and a nut 36 is threadedly connected to the stud B35; the fixing frame includes a base plate 4 with an adjusting bolt 40 threadedly connected in the middle, and four extension arms 41 are provided on the peripheral side of the base plate 4, and a through hole for the stud B35 to pass through is provided at the end of the extension arm 41; and then when in use, by rotating the adjusting bolt 40, the base 3 and the fixing frame are driven to approach each other, so as to control the first structural member 1 and the second structural member 2 to clamp and fix the sealing ring 100 located therebetween.

[0036] Specifically, the end of the adjusting bolt 40 abuts against a positioning seat 42 set on the top of the second structural member 2, and the upper surface of the positioning seat 42 is provided with four guide rods 43 that respectively penetrate the four extension arms 41, and the ends of the guide rods 43 are connected to the limiting blocks 44; the upper surface of the base 3 is provided with a limiting groove 31 that cooperates with the first structural member 1.

[0037] In order to supply power to the electromagnet A131 and the electromagnet B115 during use, a blind hole is opened on one side wall of the base 10, and a power supply connector electrically connected to the electromagnet A131 and the electromagnet B115 is arranged in the blind hole.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A finished rubber sealing ring air tightness detection device, characterized in that: It comprises a first structural member (1) and a second structural member (2) matched with the first structural member (1); The first structural member (1) comprises a base (10), a boss (11) is arranged on the upper surface of the base (10), a stud A (13) is arranged on the boss (11), and a truncated cone-shaped guide column (14) is threadedly connected to the stud A (13); The top of the guide column (14) is recessed downward to form a groove A (15), the bottom side of the groove A (15) is recessed to form a groove B (151), and the bottom side of the groove B (151) is provided with a threaded hole (152) threadedly connected to the stud A (13); The bottom side surface of the groove B (151) is provided with an elastic telescopic member (16), the end of the elastic telescopic member (16) is connected with a movable plate (161) which slides along the inner wall of the groove B (151) in a sealed manner, a needle (162) is arranged on the top of the movable plate (161), a movable support ring (17) is arranged on the bottom side surface of the groove A (15), a threaded portion is arranged at the open end of the groove A (15), and a top plate (18) with an opening (181) is threadedly connected to the threaded portion, and an air bag (19) filled with a marking gas is placed in the groove A (15) between the support ring (17) and the top plate (18); An electromagnet A (131) is disposed on the top of the stud A (13), and a magnet A cooperating with the electromagnet A (131) is embedded in the movable plate (161); When in use, the sealing ring (100) is placed on the first structural member (1), and then the second structural member (2) is controlled to be installed on the first structural member (1); then the whole consisting of the first structural member (1), the sealing ring (100) and the second structural member (2) is placed in a negative pressure tank with a gas sensor disposed therein, and the negative pressure tank is connected to the negative pressure device; The first structural member (1), the sealing ring (100) and the second structural member (2) cooperate to form a closed space.

2. A finished rubber sealing ring air tightness detection device according to claim 1, characterized in that: The marking gas is selected from one or more of nitrogen dioxide, carbon dioxide, carbon monoxide, hydrogen sulfide or methane.

3. The air tightness detection device for a finished rubber sealing ring according to claim 1, characterized in that: The second structural member (2) comprises a cylinder (20), a flange (21) is provided at the end of the cylinder (20), and a positioning column (22) is provided on the flange (21); A positioning hole (12) for inserting a positioning column (22) is provided on the upper surface of the base (10) located on the peripheral side of the sealing ring (100).

4. The air tightness detection device for a finished rubber sealing ring according to claim 1, characterized in that: A channel (110) is arranged on the boss (11) and the stud A (13), an opening end of the channel (110) is arranged on the top of the stud A (13), and the other opening end is arranged on the side wall of the boss (11).

5. The air tightness detection device for a finished rubber sealing ring according to claim 1, characterized in that: The circumferential side wall of the boss (11) is provided with an inwardly recessed cavity (111); the inner side wall of the cavity (111) is connected to a push block (112) that slides along the inner wall of the cavity (111) via a guide elastic telescopic rod (113); an electromagnet B (115) is provided in the cavity (111); and a magnet B (114) that cooperates with the electromagnet B (115) is installed on the inner wall of the push block (112).

6. A finished rubber sealing ring air tightness detection device according to any one of claims 1 to 5, characterized in that: It also includes a fixing member for pressing the first structural member (1) and the second structural member (2) together; The fixing member comprises a base (3), the upper surface of the base (3) is connected to a fixing frame via a connecting column (33), and the fixing frame is threadedly connected with an adjusting bolt (40) for controlling the first structural member (1) and the second structural member (2) to approach each other.

7. A finished rubber sealing ring air tightness detection device according to claim 6, characterized in that: Four protrusions (32) for fixing the connecting column (33) are arranged on the circumferential side of the base (3); a limiting plate (34) is arranged on the top of the connecting column (33); a stud B (35) is arranged on the limiting plate (34); and a nut (36) is threadedly connected to the stud B (35); The fixing frame comprises a base plate (4) with an adjusting bolt (40) threadedly connected in the middle, four extension arms (41) are arranged on the peripheral side of the base plate (4), and through holes for the stud B (35) to pass through are arranged at the ends of the extension arms (41).

8. The air tightness detection device for a finished rubber sealing ring according to claim 7, characterized in that: The end of the adjusting bolt (40) abuts against a positioning seat (42) set on the top of the second structural member (2); the upper surface of the positioning seat (42) is provided with four guide rods (43) respectively penetrating four extension arms (41); the ends of the guide rods (43) are connected to a limiting block (44); the upper surface of the base (3) is provided with a limiting groove (31) that cooperates with the first structural member (1).

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