CN210664928U - Closing mechanism - Google Patents

Abstract

The utility model provides a sealing mechanism for sealing the channel of a device to be detected, which comprises a shaft, a body, a rubber part and a stop part, wherein the shaft is freely telescopic along the length direction of the body, the body provides a supporting space for the shaft, and the rubber part is sleeved on the outer ring of the shaft; the stop piece is arranged on the front end part of the shaft, a thrust surface is formed on the body facing the front end part of the shaft, the rubber piece is positioned between the stop piece and the thrust surface, and a spring wrapped by the rubber piece is arranged on the outer ring of the shaft; when the shaft is displaced toward the thrust surface, the spacing between the stopper and the thrust surface is reduced to compress the spring, and the rubber member is held up and abutted against the passage. The utility model discloses a mechanical type structure, when the sealed effect of reinforcing, reduced the degree of difficulty of operation to improve the efficiency that detects.

Description

Closing mechanism

Technical Field

The utility model belongs to the technical field of the engine gas tightness detects, concretely relates to closing mechanism who uses in cylinder body gas tightness testing process.

Background

Leak detection is the detection of the airtightness of a cylinder block, and the detection of the flow rate of the cylinder block, such as the respective orifices of the engine block, by plugging the cylinder block and charging the interior of the engine, determines whether there is a leak in the engine block. In the process of leak detection of the assembly, three plugs, namely a water inlet pipe plug, a water outlet pipe plug and a water outlet pipe blind plug, are generally required, wherein the water inlet pipe plug and the water outlet pipe blind plug are sealing devices, and the water outlet pipe plug is a sealing and inflating device; when an operator connects the water outlet pipe plug, the air inflation process is carried out, and whether a leakage point exists in the water channel is judged by detecting the flow of the air flow.

The plug in the prior art adopts an inflatable structure, as shown in figure 1, the structure of the plug is formed by overlapping two layers of rubber sheets, and the inner layer of the rubber sheet is inflated to expand to achieve a sealing effect, wherein 1-1 in figure 1 is a body, 1-2 is a locking ring, 1-3 is a rubber sleeve, 1-4 is the expanded state of the rubber sleeve, and 1-5 is a steam inlet.

In the use process of the inflatable plug, the rubber skin and the inner wall of the pipe orifice are frequently rubbed, so that the rubber plug is easily damaged, and the phenomena of poor sealing effect and short service life exist; in addition, need during the operation fill in the mouth of pipe with this inflatable end cap completely earlier, the effect requires height, operation process is loaded down with trivial details, seriously influences the normal clear of gas tightness detection.

SUMMERY OF THE UTILITY MODEL

To prior art's defect, the utility model provides a closing mechanism when the sealed effect of reinforcing, has reduced the degree of difficulty of operation to improve the efficiency that detects.

The utility model discloses a concrete technical scheme is:

a sealing mechanism is used for sealing a channel of a device to be detected and comprises a shaft, a body, a rubber piece and a stop piece, wherein the shaft is freely telescopic along the length direction of the body, the body provides a supporting space for the shaft, and the rubber piece is sleeved on an outer ring of the shaft;

the stop piece is arranged on the front end part of the shaft, a thrust surface is formed on the body facing the front end part of the shaft, the rubber piece is positioned between the stop piece and the thrust surface, and a spring wrapped by the rubber piece is arranged on the outer ring of the shaft;

when the shaft is displaced toward the thrust surface, the spacing between the stopper and the thrust surface is reduced to compress the spring, and the rubber member is held up and abutted against the passage.

In the above technical solution of the present invention, by providing the shaft and the stop member capable of moving relative to the body (specifically, extending and retracting along the length direction of the channel), the spring acts on the rubber member after being extruded, so that the rubber member is supported and tightly attached to the channel to form a seal; the sealing mode adopts mechanical driving (based on the extension and contraction of the shaft), the sealing effect is good, a sealing structure is formed through the displacement of the shaft, the realization is convenient, and the difficulty of operation is reduced.

Further, the rubber part is located between backstop and thrust face (body), and along with the reduction of the interval between backstop and the thrust face, the spring is compressed and extrudees the rubber part and makes it expand outward, after the interval between backstop and the thrust face increases to and predetermines the position, spring, rubber part all resume original state, and at this moment, the rubber part can not paste on the passageway inner wall, has avoided the wearing and tearing of rubber part in the normal equipment, is favorable to long-time the use.

According to the utility model discloses a another kind of embodiment, the rubber spare is hollow cylindricality rubber sleeve, is equipped with at least one ring channel on the inner circle surface of rubber spare, is extruded at the rubber spare after, can be preferred to form the arch in the outer lane department that the rubber spare is located the ring channel to in order to reach the sealed effect of settlement.

Preferably, the annular groove is arranged close to the front end part of the shaft, and the annular groove is arranged in the front half section of the rubber part close to the front end part.

According to another embodiment of the invention, the thrust surface is arranged to completely cover the passage.

According to the utility model discloses a another kind of embodiment, the body be equipped with axle complex recess, the recess provides the support space for the axle.

Specifically, the body is provided with a hole communicated with the groove, the shaft is provided with a rear end part positioned in the groove, the rear end part of the shaft is provided with a connecting shaft, the connecting shaft penetrates through the hole and extends out of the body, and the connecting shaft is connected with an external power structure through the connecting shaft, so that the shaft can freely stretch out and retract.

As an extension of the utility model, the utility model also comprises a pressure bar component which is used for driving the shaft to extend or retract along the length of the body;

further, the device also comprises a pin; the pressure lever component is pivoted to the shaft through a pin and is abutted to the body; one preferred strut member is: and a first straight line segment and a second straight line segment and a guide segment respectively connected with the first straight line segment and the second straight line segment are formed at the position where the pressure lever component is abutted with the body, wherein the vertical distances between the first straight line segment and the pin and the second straight line segment are not equal.

Wherein the guide section is formed as a circular arc surface or a cam surface.

Further, the first straight line segment and the second straight line segment are arranged to be perpendicular or parallel to each other.

The utility model provides a rubber spare can stretch into in the passageway completely, also can the part stretch into in the passageway.

The utility model discloses possess following beneficial effect:

the utility model adopts the mechanical telescopic shaft to realize the sealing connection between the elastic part and the inner wall of the channel, the sealing effect is good, the use process is simple and convenient, the inflation operation of the expansion type plug is not needed, the difficulty of the operation is reduced, and the detection efficiency is improved;

the utility model discloses avoided the frequent friction between elastic component and the passageway inner wall, effectively improved the life-span of product, the cost is reduced.

The present invention will be described in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a prior art inflatable plug;

fig. 2 is a schematic structural view of the sealing mechanism of the present invention;

FIG. 3 is a schematic view of the closing mechanism of the present invention in use;

fig. 4 is a schematic structural view of the compression bar member of the present invention.

Detailed Description

As shown in fig. 2 to 4, a closing mechanism for closing a passage a of a device to be tested includes a shaft 1, a body 2, a spring, a rubber 3, a stopper 4, a pin 5, and a pressing rod member 6.

The body 2 is cylindrical, a groove 21 is arranged on the body 2, and the shaft 1 is arranged in a supporting space formed by the groove 21 and can extend out and retract in the groove 21; a stopper 4 is provided at the front end portion of the shaft 1, the stopper 4 is preferably cylindrical with a diameter larger than that of the shaft 1, a thrust surface 22 is formed at a side of the body 2 near the front end portion of the shaft 1, the thrust surface 22 is capable of completely covering a passage such as a nozzle of an engine block, a spring is installed between the stopper 4 and the thrust surface 22, a rubber member 3 is also installed between the stopper 4 and the thrust surface 22, and the rubber member 3 is provided so as to completely wrap the outside of the spring.

Wherein the rubber member 3 is a cylindrical rubber sleeve, an annular groove 31 is arranged on the inner ring surface of the rubber member 3, when the shaft 1 retracts towards the thrust surface 22, the distance between the stop member 4 and the thrust surface 22 is reduced to press the spring, and the rubber member 3 is pressed to be externally tightly attached to the passage, particularly, the position of the annular groove 31 is outwards protruded to form a sealing connection with the inner wall of the passage so as to close the passage.

When the shaft 1 extends out towards the thrust surface 22, the distance between the stop part 4 and the thrust surface 22 is increased, the spring is restored to the initial state, correspondingly, the rubber part 3 is also restored to the initial state, and frequent friction between the rubber part 3 and the inner wall of the channel in the dismounting process is avoided, so that the abrasion to the rubber part 3 is reduced.

The utility model discloses in carry out axle 1 freely flexible along the length direction of body through setting up outside mechanical power structure, concrete structure as follows:

a hole 23 communicated with the groove 21 is formed in the body 2, the shaft 1 is provided with a rear end part positioned in the groove 21, a connecting shaft 7 is arranged at the rear end part of the shaft 1, and the connecting shaft 7 penetrates through the hole 23 and extends out of the body 2; at the end of the connecting shaft 7 that protrudes outside the body 2, a pin 5 and a pressure lever member 6 connected to the connecting shaft 7 by the pin 5 are provided, wherein the pressure lever member 6 is always in abutment against the body 2 under the action of a spring.

The pressure lever member 6 is in a long rod shape with a handle, a first straight line section 61, a second straight line section 62 and a guide section 63 are arranged at the position where the pressure lever member 6 is abutted with the body 2, wherein the vertical distance between the first straight line section 61 and the pin 5 is larger than that between the second straight line section 62 and the pin 5.

Further, the guide section 63 may be a cam surface structure shown in fig. 4.

The utility model discloses a use does:

in the initial state, the front end part (including the spring and the rubber part 3) of the shaft 1 is extended into a specified depth position in the channel, as shown in fig. 3; by shifting the pressure lever member 6 to a working state, the shaft 1 contracts to move outwards to tension the spring, and the external rubber part 3 is supported, so that a sealing effect is achieved.

The straight line segment two 62 in the pressing rod member 6 is abutted against the body 2 in the initial state, and the straight line segment one 61 in the pressing rod member 6 is abutted against the body 2 in the working state, for example, the difference between the vertical distance between the straight line segment one 61 and the pin 5 and the vertical distance between the straight line segment two and the pin 5 is 7-8mm, and the rubber piece 3 can be deformed sufficiently by the small difference to form the set sealing effect.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. Any person skilled in the art can make some modifications without departing from the scope of the invention, i.e. all equivalent modifications made according to the invention are intended to be covered by the scope of the invention.

Claims (10)

1. A closure mechanism for closing a passage of a device to be tested, the closure mechanism comprising:

a telescopic shaft (1);

a body (2) providing a support space for the shaft (1), the shaft (1) being movable in a length direction of the body (2);

the rubber piece (3) is sleeved on the outer ring of the shaft (1); and

a stopper (4);

the stop piece (4) is arranged on the front end part of the shaft (1), a thrust surface (22) is formed on the body (2) towards the front end part of the shaft (1), the rubber piece (3) is positioned between the stop piece (4) and the thrust surface (22), and a spring wrapped by the rubber piece (3) is arranged on the outer ring of the shaft (1);

when the shaft (1) is displaced towards the thrust surface (22), the distance between the stop (4) and the thrust surface (22) decreases to compress the spring, and the rubber (3) is braced and clings to the passage.

2. A closure mechanism according to claim 1, wherein the rubber member (3) is a hollow cylindrical rubber sleeve, and at least one annular groove (31) is provided in the inner circumferential surface of the rubber member (3).

3. A closure mechanism as claimed in claim 1, characterised in that the thrust surface (22) is arranged to completely cover the passage.

4. A closure mechanism as claimed in claim 1, characterised in that the body (2) is provided with a recess (21) cooperating with the shaft (1), which recess (21) provides a support space for the shaft (1).

5. A closure mechanism as claimed in claim 4, characterised in that the recess (21) is provided near the front end of the shaft (1).

6. The closure mechanism according to claim 4, wherein the body (2) is provided with a hole (23) communicating with the groove (21), the shaft (1) has a rear end portion located in the groove (21), a connecting shaft (7) is provided at the rear end portion of the shaft (1), and the connecting shaft (7) penetrates through the hole (23) and protrudes to the outside of the body (2).

7. A closure mechanism as claimed in any one of claims 1 to 6, further comprising a strut member (6) for urging the shaft (1) to extend or retract along the length of the body.

8. A closure mechanism as claimed in claim 7, further comprising a pin (5);

the pin (5) is arranged to vertically penetrate through the shaft (1), the pressure lever member (6) is pivoted with the shaft (1) through the pin (5), and the pressure lever member (6) is abutted to the body (2);

a first straight line segment (61), a second straight line segment (62) and a guide segment (63) which is respectively connected with the first straight line segment (61) and the second straight line segment (62) are formed at the position where the pressure lever component (6) is abutted to the body (2), wherein the vertical distances between the first straight line segment (61), the second straight line segment (62) and the pin (5) are not equal.

9. A closure mechanism as claimed in claim 8, wherein the guide section (63) is formed as a circular or cam surface.

10. The closure mechanism of claim 8, wherein said straight sections one (61) and two (62) are arranged perpendicular or parallel to each other.

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