Leak-proof high-temperature and high-pressure stop valve

Abstract

The utility model discloses a leakproof high-temperature and high-pressure stop valve which comprises a valve body, a valve cover is connected to the valve body, a first channel and a second channel which are communicated are arranged on the valve body, the inner end of the first channel is located below the inner end of the second channel, a valve rod is connected to the valve cover in a threaded mode, the upper end of the valve rod is connected with a rotary disc, and the lower end of the valve rod extends into the valve body. The extending end is connected with a plug, the bottom face of the plug is connected with an annular protruding block, a circle of first sealing gasket is arranged at the bottom of the annular protruding block, a circle of second sealing gasket is arranged on the periphery of the annular protruding block, and an annular groove matched with the annular protruding block is formed in the top of the first channel. The valve rod is driven to move into the valve body until the annular protruding block on the plug is inserted into the annular groove of the first channel, meanwhile, the second sealing gasket is tightly pressed on the top of the first channel, and therefore the sealing performance between the plug and the first channel is improved through double cooperation of the first sealing gasket and the second sealing gasket.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a leakage-proof high-temperature and high-pressure stop valve. Background Art

[0002] The stop valve, also called the cut-off valve, is the most widely used valve. After searching, it was found that the Chinese utility model patent with the authorization publication number CN218818196U discloses a high-temperature resistant stop valve. From its specification, it can be seen that twisting the hand wheel drives the rotating rod to rotate, thereby driving the small gear to rotate, further driving the large gear to rotate, and finally driving the threaded rod to rotate, and the threaded rod drives the connecting rod to move up and down, and further drives the plunger to move up and down on the inner wall of the hollow column, so that the lower end of the plunger is inserted into the tapered groove, and the rotation of the hand wheel is stopped, so that the plunger is fixed and the stop valve is used.

[0003] However, the stop valve in the above patent has the following problem: the two channels are closed only by the plunger, and the sealing performance of the plunger is weak, which easily leads to leakage of the medium. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a leakage-proof high-temperature and high-pressure stop valve to solve the problems mentioned in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A leakage-proof high-temperature and high-pressure stop valve comprises a valve body, a valve cover is connected to the valve body, a first channel and a second channel are connected to the valve body, the inner end of the first channel is located below the inner end of the second channel, a valve stem is threadedly connected to the valve cover, the upper end of the valve stem is connected to a turntable, the lower end of the valve stem extends into the valve body, and the extended end is connected to a plug, the bottom surface of the plug is connected to an annular protrusion, the bottom of the annular protrusion is provided with a circle of first sealing gasket, the outer periphery of the annular protrusion is provided with a circle of second sealing gasket, and the top of the first channel is provided with an annular groove matching the annular protrusion.

[0007] Preferably, a circle of third sealing gasket is provided at the connection between the valve cover and the valve body.

[0008] The above technical solution can ensure the sealing between the valve cover and the valve body through the third sealing gasket.

[0009] Preferably, a sealing groove with a trapezoidal cross section is provided at the lower end of the inner wall of the valve cover, a fourth sealing gasket is provided in the sealing groove, the inner wall of the fourth sealing gasket is trapezoidal, and a sealing block with a trapezoidal cross section and matching with the fourth sealing gasket is connected to the outer wall of the valve stem.

[0010] In the above technical solution, when the first channel and the second channel are in communication, the sealing block is inserted into the sealing groove and contacts the fourth sealing gasket, thereby preventing the medium from leaking from the contact point between the valve cover and the valve stem.

[0011] Preferably, two handles are connected to the outer wall of the valve cover.

[0012] The above technical solution makes it convenient to move the stop valve by means of the handle.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] Rotate the turntable to drive the valve stem to move into the valve body until the annular protrusion on the plug is inserted into the annular groove of the first channel. At the same time, the second sealing gasket is also pressed tightly on the top of the first channel. Therefore, the double cooperation of the first sealing gasket and the second sealing gasket improves the sealing between the plug and the first channel, thereby closing the first channel and the second channel to prevent the flow of medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 for Figure 2 A partial enlarged view of

[0018] In the figure: 1-valve body, 2-valve cover, 3-first channel, 4-second channel, 5-valve stem, 6-turntable, 7-block, 8-annular protrusion, 9-first sealing gasket, 10-second sealing gasket, 11-annular groove, 12-third sealing gasket, 13-fourth sealing gasket, 14-sealing block, 15-handle. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example 1

[0021] See also Figure 1 and Figure 2A leakage-proof high-temperature and high-pressure stop valve comprises a valve body 1, a valve cover 2 is connected to the valve body 1, a first channel 3 and a second channel 4 are connected to the valve body 1, the inner end of the first channel 3 is located below the inner end of the second channel 4, a valve stem 5 is threadedly connected to the valve cover 2, a turntable 6 is connected to the upper end of the valve stem 5, the lower end of the valve stem 5 extends into the valve body 1, and a plug 7 is connected to the extended end, an annular protrusion 8 is connected to the bottom surface of the plug 7, a circle of first sealing gasket 9 is provided at the bottom of the annular protrusion 8, a circle of second sealing gasket 10 is provided around the periphery of the annular protrusion 8, and an annular groove 11 matching the annular protrusion 8 is provided at the top of the first channel 3. The turntable 6 is rotated to drive the valve stem 5 to move into the valve body 1 until the annular protrusion 8 on the plug 7 is inserted into the annular groove 11 of the first channel 3, and the second sealing gasket 10 is also pressed tightly against the top of the first channel 3. The double cooperation of the first sealing gasket 9 and the second sealing gasket 10 improves the sealing between the plug 7 and the first channel 3, thereby closing the first channel 3 and the second channel 4 to prevent the flow of medium.

[0022] A circle of third sealing gasket 12 is provided at the connection between the valve cover 2 and the valve body 1, and the sealing between the valve cover and the valve body can be ensured by the third sealing gasket 12. A sealing groove with a trapezoidal cross section is provided at the lower end of the inner wall of the valve cover 2, and a fourth sealing gasket 13 is provided in the sealing groove. The inner wall of the fourth sealing gasket 13 is trapezoidal, and a sealing block 14 with a trapezoidal cross section and matched with the fourth sealing gasket 13 is connected to the outer wall of the valve stem 5. When the first channel 3 and the second channel 4 are in communication, the sealing block 14 is inserted in the sealing groove and contacts with the fourth sealing gasket 13, which can prevent the medium from leaking from the contact between the valve cover 2 and the valve stem 5.

[0023] Example 2

[0024] The difference between this embodiment and the second embodiment is that two handles 15 are connected to the outer wall of the valve cover 2 to facilitate the movement of the stop valve.

[0025] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leak-proof high-temperature and high-pressure stop valve, characterized in that: The invention comprises a valve body (1), a valve cover (2) connected to the valve body (1), a first channel (3) and a second channel (4) connected to each other are provided on the valve body (1), the inner end of the first channel (3) is located below the inner end of the second channel (4), a valve stem (5) is threadedly connected to the valve cover (2), the upper end of the valve stem (5) is connected to a rotating disk (6), the lower end of the valve stem (5) extends into the valve body (1), and the extended end is connected to a plug (7), the bottom surface of the plug (7) is connected to an annular protrusion (8), a circle of first sealing gasket (9) is provided at the bottom of the annular protrusion (8), a circle of second sealing gasket (10) is provided around the periphery of the annular protrusion (8), and an annular groove (11) matching with the annular protrusion (8) is provided at the top of the first channel (3).

2. A leak-proof high-temperature and high-pressure stop valve according to claim 1, characterized in that: A circle of third sealing gasket (12) is provided at the connection between the valve cover (2) and the valve body (1).

3. A leak-proof high-temperature and high-pressure stop valve according to claim 2, characterized in that: A sealing groove with a trapezoidal cross section is provided at the lower end of the inner wall of the valve cover (2), a fourth sealing gasket (13) is provided in the sealing groove, the inner wall of the fourth sealing gasket (13) is trapezoidal, and a sealing block (14) with a trapezoidal cross section and matching with the fourth sealing gasket (13) is connected to the outer wall of the valve stem (5).

4. The leak-proof high-temperature and high-pressure stop valve according to claim 2, characterized in that: Two handles (15) are connected to the outer wall of the valve cover (2).

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