Gate valve with good sealing performance

Abstract

The utility model relates to the technical field of sluice valves, in particular to a sluice valve with good sealing performance, which comprises a device body, a valve rod, a valve rod, a valve rod, a valve rod, a valve rod, a valve rod and a valve rod, and is characterized in that the device body comprises a valve body, the two sides of the valve body are provided with butt-joint ports; a sealing structure is connected to the outer surface of the valve rod and comprises a supporting ring, and the outer wall of the supporting ring is sleeved with a sealing ring. The limiting plate is rotated to move towards the interior of the groove formed in the supporting ring, then the sealing ring is moved downwards so that the sealing ring can be connected to the outer surface of the supporting ring in a sleeved mode, and when the valve rod is moved towards the interior of the valve body to close the valve body, the sealing ring connected to the outer wall of the supporting ring in a sleeved mode is embedded into the sealing groove formed in the valve body. When the valve rod assists in sealing the valve body, the valve body and the valve rod are sealed through the sealing ring, and the problems that the sealing performance between the valve body and the valve rod is poor, dust and impurities are likely to enter gaps, and consequently the valve rod is difficult to rotate are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a gate valve with good sealing performance. Background Art

[0002] The main function of the gate valve is to cut off or connect the medium in the pipeline, that is, it can only be used for full opening and full closing. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface will be welded with metal materials to increase wear resistance. When the gate valve is closed, it can play a sealing role through the medium pressure. The gate valve has different materials and can be used for the opening and closing of various liquids such as water flow, steam, various oils or oxidizing media. In addition, it has a wide range of applicable pressure and temperature ranges, is not limited by the flow direction, and can also bring very good sealing performance.

[0003] When the existing gate valve is used, the function of the gate valve is to cut off or connect the medium in the pipeline. The existing gate valve is sealed by the contact between the valve seat and the gate plate, and the sealing performance is good, but the sealing between the valve stem and the valve body is not good, which can easily cause dust and impurities to enter the gap, resulting in difficulty in rotating the valve stem. Utility Model Content

[0004] The utility model aims to provide a gate valve with good sealing performance, so as to solve the problem that the existing gate valve proposed in the above background technology is sealed by the contact between the valve seat and the gate plate, and has good sealing performance, but the sealing between the valve stem and the valve body is not good, which easily causes dust and impurities to enter the gap, resulting in difficulty in rotating the valve stem.

[0005] In order to achieve the above object, the utility model provides the following technical solution, a gate valve with good sealing performance, comprising:

[0006] The device body comprises a valve body, the two sides of the valve body are provided with docking ports, and a valve stem is inserted into the top of the valve body;

[0007] The outer surface of the valve stem is connected to a sealing structure, including a support ring, a sealing ring is sleeved on the outer wall of the support ring, a limiting ring is connected to the bottom end of the support ring, torsion springs are connected inside both sides of the support ring, and one end of the torsion spring is connected to a limiting plate.

[0008] Preferably, grooves are provided on both sides of the support ring, and one end of the torsion spring is connected to one side of the inner wall of the groove provided in the support ring.

[0009] Preferably, the sealing ring is sleeved on the outer surface of the supporting ring, and the limiting ring is located at the bottom of the sealing ring for support.

[0010] Preferably, a sealing groove is provided on the top surface of the valve body, and the sealing ring is embedded in the sealing groove of the valve body.

[0011] Preferably, limiting structures are inserted inside both sides of the support ring, and the limiting structures include a slider, a support spring is connected to the bottom of the slider, a slide plate is connected to one side of the slider, and a fixing screw is inserted inside the slide plate.

[0012] Preferably, sliding grooves are provided on both sides of the inner wall of the groove formed by the support ring, and the bottom end of the support spring is connected to one side of the inner wall of the sliding groove formed by the support ring.

[0013] Preferably, two groups of thread grooves are provided on both sides of the valve stem, a through hole is provided on the surface of the slide plate, and one end of the fixing screw passes through the through hole provided in the slide plate and is rotatably connected to the inside of the thread groove provided in the valve stem.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Rotate the limit plate to move it into the groove of the support ring, and then move the sealing ring downward, so that the sealing ring is sleeved on the outer surface of the support ring, and the bottom of the sealing ring is supported and limited by the limit ring, and then release the limit plate to allow the torsion spring to drive the limit plate to reset, so that the sealing ring is limited by the limit plate and the limit ring, and then move the valve stem into the valve body to close the valve body, and fit the sealing ring sleeved on the outer wall of the support ring into the sealing groove of the valve body, and use the sealing ring to fill and seal between the valve body and the valve stem, so that when the valve stem is closed by the auxiliary valve body, the sealing ring is used to seal between the valve body and the valve stem, so as to avoid poor sealing between the valve body and the valve stem, which may easily cause dust and impurities to enter the gap and cause difficulty in rotating the valve stem.

[0016] 2. Rotate the fixing screw to disengage it from the threaded groove of the valve stem, and then move the position of the slide plate to make the slider slide in the slide groove of the support ring and shrink the support spring. After the bottom of the slide plate abuts against the top surface of the limit plate, pass one end of the fixing screw through the through hole of the slide plate and rotate it to connect to the threaded groove of the valve stem to limit the slide plate. Use the slide plate to limit the angle of the limit plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view stereoscopic schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a front view and cutaway perspective diagram of the structure of the utility model;

[0019] Figure 3 It is a schematic diagram of a side cutaway perspective view of the structure of the utility model;

[0020] Figure 4 For this utility model Figure 3 A in the middle is an enlarged three-dimensional schematic diagram of the structure;

[0021] Figure 5 It is a partially cutaway three-dimensional schematic diagram of the structure of the utility model when viewed from above.

[0022] In the figure: 1. Device body; 11. Valve body; 12. Docking port; 13. Valve stem; 2. Sealing structure; 21. Support ring; 22. Sealing ring; 23. Limiting ring; 24. Torsion spring; 25. Limiting plate; 3. Limiting structure; 31. Sliding block; 32. Support spring; 33. Sliding plate; 34. Fixing screw. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-5 , an embodiment provided by the utility model:

[0025] A gate valve with good sealing performance, comprising:

[0026] The device body 1 includes a valve body 11, and docking ports 12 are provided on both sides of the valve body 11. A valve stem 13 is inserted into the top of the valve body 11. The mechanical components in the valve body 11 are prior art and can be purchased on the market. They are not technical protection points of this application, so no excessive description is made;

[0027] The outer surface of the valve stem 13 is connected to a sealing structure 2, including a support ring 21, a sealing ring 22 is sleeved on the outer wall of the support ring 21, a limiting ring 23 is connected to the bottom end of the support ring 21, and torsion springs 24 are connected to the inside of both sides of the support ring 21, and one end of the torsion spring 24 is connected to a limiting plate 25.

[0028] Furthermore, grooves are provided on both sides of the support ring 21 , and one end of the torsion spring 24 is connected to one side of the inner wall of the groove provided in the support ring 21 , so that one end of the torsion spring 24 is limited by the groove provided in the support ring 21 .

[0029] Furthermore, the sealing ring 22 is sleeved on the outer surface of the supporting ring 21 , and the limiting ring 23 is located at the bottom of the sealing ring 22 for support, so that the limiting ring 23 can limit the bottom of the sealing ring 22 .

[0030] Furthermore, a sealing groove is provided on the top surface of the valve body 11 , and the sealing ring 22 is embedded in the sealing groove of the valve body 11 , so that the sealing ring 22 is limited by the sealing groove of the valve body 11 .

[0031] Furthermore, a limiting structure 3 is inserted inside both sides of the support ring 21, and the limiting structure 3 includes a slider 31, a support spring 32 is connected to the bottom of the slider 31, a slide plate 33 is connected to one side of the slider 31, and a fixing screw 34 is inserted inside the slide plate 33, so as to limit the angle of the limiting plate 25 through the slide plate 33.

[0032] Furthermore, slide grooves are provided on both sides of the inner wall of the groove formed by the support ring 21, and the bottom end of the support spring 32 is connected to one side of the inner wall of the slide groove formed by the support ring 21, so that the bottom end of the support spring 32 is limited by the slide groove formed by the support ring 21.

[0033] Furthermore, two sets of threaded grooves are opened on both sides of the valve stem 13, and a through hole is opened on the surface of the slide plate 33. One end of the fixing screw 34 passes through the through hole opened in the slide plate 33 and is rotatably connected to the inside of the threaded groove opened in the valve stem 13, so as to limit the position of the slide plate 33 by the fixing screw 34.

[0034] Working principle: When the gate valve is sealed, the limiting plate 25 is rotated to move it into the groove formed by the support ring 21, and then the sealing ring 22 is moved downward, so that the sealing ring 22 is sleeved on the outer surface of the support ring 21, and the bottom of the sealing ring 22 is supported and limited by the limiting ring 23, and then the limiting plate 25 is released to allow the torsion spring 24 to drive the limiting plate 25 to reset, so that the limiting plate 25 is used to cooperate with the limiting ring 23 to limit the sealing ring 22, and then the valve stem 13 is moved into the valve body 11 to close the valve body 11, and the sealing ring 22 sleeved on the outer wall of the support ring 21 is embedded in the sealing groove formed by the valve body 11, and the sealing ring 22 is used to fill and seal the space between the valve body 11 and the valve stem 13, so that when the valve stem 13 is closed by the auxiliary valve body 11, the sealing ring 22 is used to seal the space between the valve body 11 and the valve stem 13.

[0035] When limiting the gate valve, the fixing screw 34 is rotated to disengage it from the threaded groove formed in the valve stem 13, and then the position of the slide plate 33 is moved to make the slider 31 slide in the slide groove formed in the support ring 21, and the support spring 32 is contracted. After the bottom of the slide plate 33 abuts against the top surface of the limiting plate 25, one end of the fixing screw 34 is passed through the through hole formed in the slide plate 33 and is rotated to be connected to the threaded groove formed in the valve stem 13 to limit the slide plate 33, and the slide plate 33 is used to limit the angle of the limiting plate 25.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A gate valve with good sealing performance, characterized in that: include: The device body (1) comprises a valve body (11), the two sides of the valve body (11) are provided with docking ports (12), and a valve stem (13) is inserted into the top end of the valve body (11); The outer surface of the valve stem (13) is connected to a sealing structure (2), which includes a support ring (21). The outer wall of the support ring (21) is sleeved with a sealing ring (22). The bottom end of the support ring (21) is connected to a limiting ring (23). Torsion springs (24) are internally connected to both sides of the support ring (21), and one end of the torsion spring (24) is connected to a limiting plate (25).

2. A gate valve with good sealing performance according to claim 1, characterized in that: Grooves are provided on both sides of the support ring (21), and one end of the torsion spring (24) is connected to one side of the inner wall of the groove provided in the support ring (21).

3. A gate valve with good sealing performance according to claim 1, characterized in that: The sealing ring (22) is sleeved on the outer surface of the supporting ring (21), and the limiting ring (23) is located at the bottom of the sealing ring (22) for support.

4. A gate valve with good sealing performance according to claim 1, characterized in that: The top surface of the valve body (11) is provided with a sealing groove, and the sealing ring (22) is embedded in the sealing groove provided in the valve body (11).

5. A gate valve with good sealing performance according to claim 1, characterized in that: Limiting structures (3) are inserted inside the two sides of the support ring (21), and the limiting structure (3) includes a slider (31). The bottom of the slider (31) is connected to a supporting spring (32), and one side of the slider (31) is connected to a slide plate (33), and a fixing screw (34) is inserted inside the slide plate (33).

6. A gate valve with good sealing performance according to claim 5, characterized in that: Slide grooves are provided on both sides of the inner wall of the groove formed by the support ring (21), and the bottom end of the support spring (32) is connected to one side of the inner wall of the slide groove formed by the support ring (21).

7. A gate valve with good sealing performance according to claim 5, characterized in that: Two groups of thread grooves are formed on both sides of the valve stem (13), a through hole is formed on the surface of the slide plate (33), and one end of the fixing screw rod (34) passes through the through hole formed in the slide plate (33) and is rotatably connected to the inside of the thread groove formed in the valve stem (13).

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