Sealing structure for rear end of cylindrical product

Abstract

The invention discloses a cylindrical product rear end sealing structure which comprises a pressing cover, a threaded connection ring, a pressing screw and a sealing ring. A group of screw through holes are axially formed in the outer ring of the pressing cover; a sealing ring mounting groove is formed in the outer ring of the lower plate surface of the pressing cover; the threaded connecting ring is an annular piece with connecting threads machined on the inner wall, and a set of screw connecting holes are axially formed in the annular face of the threaded connecting ring. The sealing ring is sleeved with a sealing ring installation groove in the outer ring of the lower plate face of the pressing cover, the threaded connection ring is connected to the outer wall of the rear end opening portion of the cylindrical product in a threaded mode, the pressing cover and the threaded connection ring are fixed through the pressing screw, and the sealing ring is pressed between the pressing cover and the rear end face of the cylindrical product. According to the rear end sealing structure of the cylindrical product, the problem that the sealing ring is wrinkled due to radial rotation along with tightening is solved.

Description

Technical Field

[0001] The invention relates to a rear end sealing structure of a cylindrical product, belonging to the technical field of rocket engines. Background Art

[0002] The rear end of a cylindrical product needs to be sealed and packaged. During assembly, a sealing plug is usually screwed onto the external thread at the rear end of the cylindrical product, and a sealing rubber pad is installed on the contact end surface between the sealing plug and the product, which is convenient for installation and tightening and for achieving end face sealing after tightening. However, during the tightening process, the sealing rubber pad will also rotate with the rotation of the sealing cap, especially if the sealing plug, the sealing rubber pad, and the product plug end surface are in contact and continue to be tightened, the rubber sealing pad will be wrinkled due to pressure and torque, thus making the seal ineffective. Summary of the invention

[0003] The purpose of the present invention is to provide a rear end sealing structure for a cylindrical product.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A rear end sealing structure of a cylindrical product of the present invention comprises a compression cover, a threaded connection ring, a compression screw and a sealing ring;

[0006] The clamping cover is a circular plate with a diameter larger than the outer diameter of the cylindrical product. A group of screw passing holes are axially opened on the outer ring of the clamping cover, and a sealing ring installation groove is opened on the outer ring of the lower plate surface of the clamping cover.

[0007] The threaded connection ring is a ring-shaped part with a connection thread processed on the inner wall. The inner thread of the threaded connection ring matches the outer thread of the outer wall of the rear port of the cylindrical product. A group of screw connection holes are axially opened on the annular surface of the threaded connection ring. The distribution position of the screw connection holes of the threaded connection ring matches the distribution position of the screw through holes of the clamping cover.

[0008] The sealing ring is sleeved in the sealing ring installation groove of the outer ring of the lower plate surface of the clamping cover, the threaded connecting ring is threadedly connected to the outer wall of the rear port portion of the cylindrical product, the clamping cover and the threaded connecting ring are fixed by the clamping screw, and the sealing ring is compressed between the clamping cover and the rear end surface of the cylindrical product.

[0009] Beneficial Effects

[0010] The rear end sealing structure of the cylindrical product of the present invention solves the problem of wrinkling of the sealing ring due to radial rotation as it is tightened. During the process of tightening the clamping screw, the rear end sealing structure of the cylindrical product of the present invention will not rotate radially as it is tightened, but will only bear axial pressure. The tighter it is tightened, the greater the axial pressure, thereby achieving the effect of end face sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the assembly of the rear end sealing structure of the cylindrical product of the present invention;

[0012] In the figure, 1- clamping screw, 2- sealing ring, 3- clamping cover, 4- threaded connecting ring, 5- cylindrical product. DETAILED DESCRIPTION

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Example

[0015] like Figure 1 As shown, a rear end sealing structure of a cylindrical product of the present invention comprises a compression cover 3, a threaded connection ring 4, a compression screw 1 and a sealing ring 2;

[0016] The compression cover 3 is a circular plate with a diameter larger than the outer diameter of the cylindrical product 5. A group of screw holes are axially opened on the outer ring of the compression cover 3, and a sealing ring installation groove is opened on the outer ring of the lower plate surface of the compression cover 3;

[0017] The threaded connection ring 4 is a ring-shaped part with a connection thread processed on the inner wall. The inner thread of the threaded connection ring 4 matches the outer thread of the outer wall of the rear port of the cylindrical product 5. A group of screw connection holes are axially opened on the annular surface of the threaded connection ring 4. The distribution position of the screw connection holes of the threaded connection ring 4 matches the distribution position of the screw through holes of the clamping cover 3.

[0018] The sealing ring 2 is sleeved in the sealing ring installation groove of the outer ring of the lower plate surface of the clamping cover 3, and the threaded connecting ring 4 is threadedly connected to the outer wall of the rear port portion of the cylindrical product 5. The clamping cover 3 and the threaded connecting ring 4 are fixed by the clamping screw 1, and the sealing ring 2 is compressed between the clamping cover 3 and the rear end surface of the cylindrical product 5.

Claims

1. A rear end sealing structure for a cylindrical product, characterized in that: It includes a compression cover, a threaded connection ring, a compression screw and a sealing ring; The clamping cover is a circular plate with a diameter larger than the outer diameter of the cylindrical product. A group of screw passing holes are axially opened on the outer ring of the clamping cover, and a sealing ring installation groove is opened on the outer ring of the lower plate surface of the clamping cover. The threaded connection ring is a ring-shaped part with a connection thread processed on the inner wall. The inner thread of the threaded connection ring matches the outer thread of the outer wall of the rear port of the cylindrical product. A group of screw connection holes are axially opened on the annular surface of the threaded connection ring. The distribution position of the screw connection holes of the threaded connection ring matches the distribution position of the screw through holes of the clamping cover. The sealing ring is sleeved in the sealing ring installation groove of the outer ring of the lower plate surface of the clamping cover, the threaded connecting ring is threadedly connected to the outer wall of the rear port portion of the cylindrical product, the clamping cover and the threaded connecting ring are fixed by the clamping screw, and the sealing ring is compressed between the clamping cover and the rear end surface of the cylindrical product.

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