Valve seat and valve cover mounting structure

Abstract

The utility model relates to a valve seat and valve cover installation structure which comprises a valve cover and a valve seat installed in the valve cover, a second spring is installed in the valve cover, the second spring is connected with a pressing ring in an abutting mode, a gasket is arranged between the pressing ring and the valve cover, valve seat padding is installed in the valve seat, and the valve seat padding is connected with the pressing ring in an abutting mode. According to the mounting structure, the gasket is arranged between the pressing ring and the valve cover, when a pressing machine presses down, the second spring can be protected through the gasket, the problem that the second spring loses efficacy due to overpressure of the second spring is prevented, and the second spring can press the valve seat filler, so that the sealing performance of the whole mounting structure is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ball valve especially is a valve seat valve cover installation structure. BACKGROUND

[0002] Hard sealing ball valve because its excellent wear resistance and high temperature resistance, its development enters the expressway, along with the massive application of various projects, its shortcomings also gradually appear, especially the valve torque problem, appears particularly outstanding, often appears the valve torque is big, even the actuator cannot switch problem.

[0003] In the valve switching process, the ball and the valve seat sealing surface friction drive the valve seat to act, if the valve seat packing is too tight, the valve seat will be limited, therefore the torque will increase accordingly.

[0004] The existing valve seat packing adopts direct assembly mode, and the valve seat packing is compressed through the bottom spring and the middle cavity nut, this method is easy to appear the compression failure of bottom spring, or the valve seat packing does not have floating space and causes the big valve torque. INNOVATION CONTENT

[0005] The utility model discloses a valve seat valve cover installation structure adopts the structure that gasket is placed between the compression ring and the valve cover, can avoid the phenomenon that spring appears damage.

[0006] In order to realize the above-mentioned purpose, the utility model provides a valve seat valve cover installation structure, including the valve cover and the valve seat installed in the valve cover, the second spring is installed in the valve cover, the second spring and a compression ring abut, a gasket is arranged between the compression ring and the valve cover, the valve seat packing is installed in the valve seat, and the valve seat packing and the compression ring abut.

[0007] Further, the compression ring includes integrally-formed thick part and thin part, and the thick part is integrally formed with the thin part.

[0008] Further, the valve seat packing is sleeved on the outer surface of the valve seat.

[0009] Further, the first spring is also installed in the valve cover.

[0010] The valve seat valve cover installation structure has the advantages that:

[0011] The gasket is arranged between the compression ring and the valve cover in the utility model, the second spring can be protected through the gasket when the press is pressed down, the problem that the second spring is over-pressed and causes the failure of the second spring is prevented, and then the valve seat packing can be pressed by the second spring, so that the sealing property of the whole installation structure is better. DRAWING DESCRIPTION

[0012] In order to make the content of the utility model more easily be clearly understood, the following according to the specific embodiment of the utility model and combining with the drawings, the utility model is further explained in detail.

[0013] Figure 1 It is the structural diagram of the mounting structure of the utility model.

[0014] In the figure: 1, packing pre-pressing tool; 2, valve seat; 3, valve seat packing; 4, gasket; 5, second spring; 6, valve cover; 7, first spring; 8, compression ring. Specific embodiments

[0015] The utility model is further explained in combination with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0016] Combining Figure 1 , the application provides a valve seat valve cover mounting structure, including valve cover 6 and the valve seat 2 installed in valve cover 6, the valve seat 2 is installed with valve seat packing 3, the valve seat packing 3 is set on the outer surface of the valve seat 2, and the sealing of valve seat 2 and valve cover 6 is realized by valve seat packing 3.

[0017] The first spring groove and the second spring groove are formed in the valve cover 6, the first spring 7 is installed in the first spring groove, and the second spring 5 is installed in the second spring groove,

[0018] One end of the first spring 7 is fixedly installed in the first spring groove, and the other end of the first spring 7 is stretched out of the first spring groove and abuts against the valve seat 2,

[0019] One end of the second spring 5 is fixedly installed in the second spring groove, and the other end of the second spring 5 abuts against a compression ring 8 after being stretched out of the second spring groove, and the compression ring 8 is arranged between the valve cover 6 and the valve body,

[0020] And the compression ring includes an integral thin part and a thick part perpendicular to the thin part, one end of the thin part abuts against the valve seat packing 3, and the other end of the thin part is connected to the thick part. The thick part abuts against one end of the second spring 5. The first spring 7 and the second spring 5 can pre-press the valve seat 2.

[0021] The thin part is nested on the valve seat 2.

[0022] Meanwhile, a gasket 4 is also installed between the thick part of the compression ring 8 and the valve cover 6, and the gasket 4 is installed in the valve cover 6.

[0023] When installing: when installing the valve seat valve cover, the valve cover 6 and the valve seat 2 of the assembled component are prepared:

[0024] Specifically, in the valve cover 6, the first spring 7 and the second spring 5 are respectively arranged in the first spring groove and the second spring groove of the valve cover 6, then the pressing ring 8 is arranged in the valve cover 6, and the gasket 4 is arranged between the thick part of the pressing ring 8 and the valve cover 6, and the arrangement of the gasket 4 does not stop the second spring 5 from extending;

[0025] At the same time, in the valve seat 2, the valve seat packing 3 is sleeved on the valve seat 2, then the valve seat 2 is arranged in the valve cover 6, the thick part of the pressing ring 8 is in abutment with the end of the valve seat 2 to stop, and at the same time, the thin part of the pressing ring 8 is arranged between the valve cover 6 and the valve seat 2,

[0026] After the valve seat 2 is arranged in the valve cover 6, the assembly of the valve cover 6 and the valve seat 2 is placed on a pressing table, and the packing pre-pressing tool 1 is arranged on a pressing machine and then slowly lowered for pressing;

[0027] The pressing machine 9 is lifted, and whether the valve seat 2 has a rebounding action is observed; if the rebounding action exists, the valve seat 2 is qualified; if the rebounding action does not exist, the operation is stopped.

[0028] In the embodiment, the gasket 4 is arranged to have a certain thickness, so that the gasket 4 can effectively prevent the second spring 5 from over-pressing during the pressing of the valve seat packing 3, thereby causing the spring to fail,

[0029] The packing pre-pressing tool 1 is self-limited, and when the pressing reaches the required height, the packing pre-pressing tool 1 is in contact with the valve cover 6, and the pressing is stopped. Since the application does not improve the pre-pressing tool 1, the pre-pressing tool 1 is not described in detail.

[0030] In the description of the embodiments of the utility model, it should be explained that, unless otherwise specified and limited, if the terms "arrange", "connect" appear, they should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0031] Obviously, the above embodiments are only examples for clearly illustrating, and not limit the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A valve seat-valve cover mounting structure characterized by: The valve cover is provided with a second spring, a pressing ring and a gasket.

2. A valve seat-valve cover mounting structure according to claim 1, characterized in that: The pressing ring is in abutment with the second spring.

3. The valve seat-valve cover mounting structure according to claim 1, characterized by: The valve seat packing is sleeved on the outer surface of the valve seat.

4. The valve seat-valve cover mounting structure according to claim 1, characterized by: The valve cover is provided with a first spring.

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