Novel valve shaft assembly of butterfly valve

Abstract

The utility model discloses a novel valve shaft assembly of a butterfly valve, relates to the field of butterfly valve shafts, solves the problems that the sealing strength cannot be continuously increased after leakage of an existing sealing ring, and the practicability is low, and adopts the following scheme that the novel valve shaft assembly comprises a valve seat and a valve shaft assembled in the valve seat, and a valve bonnet is assembled at the top of the valve shaft; a valve diameter matched with the valve shaft in specification is formed in the valve seat, a nut groove located in the top side of the valve diameter is formed in the top of the valve seat, and a lower bolt groove communicated with the nut groove is further formed in the top face of the valve seat. According to the valve shaft assembly of the novel butterfly valve, through the arrangement of the sealing gasket and the nut ring, the sealing gasket can be pressed between the valve shaft and the valve seat through the nut ring, so that one more sealing assembly can be added, and when the sealing ring and the sealing gasket leak, the nut ring can be continuously screwed under the condition that the valve shaft is not disassembled, so that the sealing gasket is continuously extruded downwards; and the sealing agent is filled between the valve seat and the valve shaft, so that the sealing strength is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valve shafts, in particular to a novel valve shaft component of a butterfly valve. Background Art

[0002] A butterfly valve is a simple regulating valve, which is a valve that opens and closes by rotating the butterfly plate around the valve shaft.

[0003] After searching, the application with patent application number CN202221437490.8 discloses a new type of butterfly valve, including a valve stem, a through-hole connecting plate, a baffle and a driving and adjusting device, a valve leaf is installed below one end of the valve stem, and the other end of the valve stem penetrates the valve body and is movably installed with the valve body, the through-hole connecting plate penetrates the valve stem through a connecting bearing and is fixed to the top of the valve body through a mounting column, a buffer spring is fixed to one side of the baffle, and the baffle is fixedly connected to the valve leaf through the buffer spring, the driving and adjusting device is installed above the valve stem and the through-hole connecting plate, and the driving and adjusting device includes a connecting plate, a connecting groove, a through hole, a groove driving block, an arc-shaped driving plate, a driving rod and a driving motor;

[0004] The above application document achieves the fixation of the mounting rod by setting a connecting plate, but still adopts the traditional valve shaft and valve cap. The outer wall of the traditional valve shaft is provided with a sealing ring to achieve leakage prevention, but it only involves single strength leakage prevention. Once the extrusion sealing ring leaks, the sealing strength cannot be increased and it can only be disassembled and replaced, which is cumbersome to operate and has low practicality.

[0005] In addition, the existing valve shaft positioning requires the positioning ring and the positioning pin to work synchronously to achieve the limit position, and the disassembly and assembly operation is relatively cumbersome;

[0006] In addition, the existing valve cap is of a detachable type, that is, when adjusting the valve shaft, the valve cap needs to be disassembled before the valve shaft can be driven. This is not only cumbersome to operate, but there is also a possibility that the valve cap is forgotten to be assembled after adjustment, resulting in the valve shaft being exposed and rusting, which reduces its service life.

[0007] Therefore, we propose a novel valve shaft assembly for a butterfly valve. Utility Model Content

[0008] In view of the deficiencies of the prior art, the utility model provides a novel valve shaft assembly of a butterfly valve, which solves the problem that the sealing strength of the prior art cannot be further increased after leakage of the sealing ring and has low practicality.

[0009] To achieve the above objectives, the utility model is implemented through the following technical solutions: a new valve shaft assembly of a butterfly valve, including a valve seat and a valve shaft assembled therein, and a valve cap is mounted on the top of the valve shaft;

[0010] The valve seat is provided with a valve diameter matching the valve shaft specification, the top of the valve seat is provided with a nut groove located at the top side of the valve diameter, and the top surface of the valve seat is also provided with a lower bolt groove communicating with the nut groove;

[0011] The inner thread sleeve of the nut groove is provided with a nut ring located on the outer side of the valve shaft, and a sealing gasket located on the outer side of the valve shaft is sandwiched between the nut ring and the bottom surface of the inner side of the nut groove;

[0012] A positioning ring located above the nut ring is sleeved on the inner side of the nut groove, a positioning groove is provided at the outer edge of the positioning ring, and an upper bolt groove corresponding to the lower bolt groove is provided on the valve cap.

[0013] Preferably, the positioning groove is a quarter ring groove, and the positioning groove and the lower bolt groove are assembled into a complete circular groove;

[0014] Among them, the setting of the arc of the positioning groove facilitates the adjustment of the rotation amplitude and position of the valve shaft.

[0015] Preferably, the upper bolt groove is located directly above the circular groove after the lower bolt groove and the positioning groove are assembled, and a limiting bolt is assembled between the lower bolt groove, the positioning groove and the upper bolt groove;

[0016] Among them, two groups of upper bolt grooves with a 90-degree angle between them are arranged in the valve cap, and the limited positions of the two groups of upper bolt grooves are the opening and closing positions of the valve shaft adjustment.

[0017] Preferably, a sealing ring is fixedly mounted on the outer wall of the valve shaft;

[0018] Among them, the sealing ring is set as the first step of sealing, and the sealing gasket is set as the second step of sealing. Double sealing ensures the leak-proof effect.

[0019] Preferably, a rectangular end block is fixedly mounted on the top of the valve shaft, and a rectangular end groove matching the specifications of the rectangular end block on the top of the valve shaft is opened on the bottom side of the valve cap;

[0020] Among them, the setting of the rectangular end block and the end groove can synchronously adjust the valve shaft to the corresponding angle when the valve cap is rotated to ensure the opening and closing effect.

[0021] Preferably, a rectangular groove matching the specifications of the rectangular end block at the top of the valve shaft is provided in the positioning ring, and the sealing gasket and the nut ring are movably mounted on the outer wall of the valve shaft.

[0022] The utility model provides a novel valve shaft assembly of a butterfly valve, which has the following beneficial effects:

[0023] 1. The valve shaft assembly of the new butterfly valve can use the nut ring to press the sealing gasket between the valve shaft and the valve seat through the arrangement of the sealing gasket and the nut ring, so as to add one more set of sealing components. When both the sealing ring and the sealing gasket leak, the nut ring can be tightened downward to continue to squeeze the sealing gasket without disassembling the valve shaft, so that it fills between the valve seat and the valve shaft, further increasing the sealing strength, and solving the problem that the sealing strength of the existing sealing ring cannot be further increased after leakage, and the practicality is low;

[0024] 2. The valve shaft assembly of the new butterfly valve can be clamped on the outer side of the rectangular end block at the top of the valve shaft by setting a positioning ring, so as to achieve the effect of limiting it, without the need for a positioning pin, which reduces the cost and saves assembly steps, ensuring practicality;

[0025] 3. The valve shaft assembly of the new butterfly valve, through the setting of the valve bonnet on the top of the valve shaft, does not need to remove the valve bonnet when the valve shaft needs to be adjusted. It only needs to remove the fastening bolts in the upper bolt groove to adjust the angle of the valve bonnet and the valve shaft synchronously. There is no need to remove the valve bonnet separately, which reduces the steps of valve bonnet adjustment and avoids the situation where the valve bonnet is forgotten to be installed, resulting in a reduction in the service life of the valve shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the inner side of the valve seat of the utility model;

[0028] Figure 3 It is a structural schematic diagram of the top side of the valve seat of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the valve shaft of the utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the valve cap of the utility model;

[0031] Figure 6 It is a structural schematic diagram of the positioning ring of the utility model.

[0032] In the figure: 1, valve seat; 11, valve diameter; 12, nut groove; 13, lower bolt groove; 2, valve shaft; 21, sealing ring; 3, valve cap; 31, upper bolt groove; 4, sealing gasket; 5, nut ring; 6, positioning ring; 61, positioning groove. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1-6 The embodiment of the utility model provides a technical solution: a valve shaft assembly of a new butterfly valve, comprising a valve seat 1 and a valve shaft 2 assembled therein, and a valve bonnet 3 is sleeved on the top of the valve shaft 2; a valve diameter 11 matching the specifications of the valve shaft 2 is provided in the valve seat 1, a nut groove 12 located on the top side of the valve diameter 11 is provided on the top of the valve seat 1, and a lower bolt groove 13 connected to the nut groove 12 is also provided on the top surface of the valve seat 1; a nut ring 5 located on the outside of the valve shaft 2 is sleeved on the inner thread of the nut groove 12, and a sealing gasket 4 located on the outside of the valve shaft 2 is sandwiched between the nut ring 5 and the bottom surface of the inner side of the nut groove 12; a positioning ring 6 located above the nut ring 5 is sleeved on the inner side of the nut groove 12, a positioning groove 61 is provided on the outer edge of the positioning ring 6, and an upper bolt groove 31 opposite to the lower bolt groove 13 is provided on the valve bonnet 3;

[0035] Among them, the valve shaft assembly of the new butterfly valve, through the arrangement of the sealing gasket 4 and the nut ring 5, can use the nut ring 5 to press the sealing gasket 4 between the valve shaft 2 and the valve seat 1, so that an additional set of sealing components can be added. When the sealing ring 21 and the sealing gasket 4 both leak, the nut ring 5 can be tightened downward to continue to squeeze the sealing gasket 4 without disassembling the valve shaft 2, so that it fills the space between the valve seat 1 and the valve shaft 2, further increasing the sealing strength, and solving the problem of low practicality that the sealing ring 21 cannot continue to increase the sealing strength after leaking.

[0036] Embodiment 2:

[0037] The positioning groove 61 is a quarter ring groove, and the positioning groove 61 and the lower bolt groove 13 are assembled into a complete circular groove; wherein, the setting of the arc of the positioning groove 61 facilitates the adjustment of the rotation amplitude and position of the valve shaft 2.

[0038] The upper bolt groove 31 is located directly above the circular groove after the lower bolt groove 13 and the positioning groove 61 are assembled, and a limiting bolt is assembled between the lower bolt groove 13, the positioning groove 61 and the upper bolt groove 31; wherein, two groups of upper bolt grooves 31 with a ninety-degree angle between them are provided in the valve bonnet 3, and the limited positions of the two groups of upper bolt grooves 31 are the opening and closing positions adjusted by the valve shaft 2.

[0039] The valve shaft assembly of the novel butterfly valve can be clamped on the outer side of the rectangular end block at the top of the valve shaft 2 by setting the positioning ring 6, so as to achieve the effect of limiting it, without the need for positioning pins, thus reducing the cost and saving assembly steps, thereby ensuring practicality.

[0040] Embodiment 3:

[0041] A sealing ring 21 is fixedly mounted on the outer wall of the valve shaft 2; wherein the sealing ring 21 is provided as the first step of sealing, and the sealing gasket 4 is provided as the second step of sealing, and the double sealing ensures the leakproof effect.

[0042] A rectangular end block is fixedly installed on the top of the valve shaft 2, and a rectangular end groove matching the specifications of the rectangular end block on the top of the valve shaft 2 is opened on the bottom side of the valve cap 3; wherein, the setting of the rectangular end block and the end groove can synchronously adjust the valve shaft 2 to the corresponding angle when the valve cap 3 is rotated, thereby ensuring the opening and closing effect.

[0043] A rectangular groove matching the specifications of the rectangular end block at the top of the valve shaft 2 is provided in the positioning ring 6 , and the sealing gasket 4 and the nut ring 5 are movably sleeved on the outer wall of the valve shaft 2 .

[0044] The valve shaft assembly of the novel butterfly valve, through the setting of the valve bonnet 3 on the top of the valve shaft 2, does not need to remove the valve bonnet 3 when the valve shaft 2 needs to be adjusted. Only the fastening bolts in the upper bolt groove 31 need to be removed to synchronously adjust the angles of the valve bonnet 3 and the valve shaft 2. There is no need to remove the valve bonnet 3 separately, which reduces the adjustment steps of the valve bonnet 3 and also avoids the situation where the valve bonnet 3 is forgotten to be installed, resulting in a reduction in the service life of the valve shaft 2.

[0045] The working principle and usage process of the utility model are as follows: when the device is needed to work, the valve shaft 2 is sleeved in the valve diameter 11, and then the sealing gasket 4 is placed in the nut groove 12, and the nut ring 5 on the top side of the sealing gasket 4 is rotated to press it, and cooperate with the sealing ring 21 for double sealing, and the nut ring 5 can be further tightened as needed to further increase the sealing strength, and then the positioning ring 6 is clamped on the top of the valve shaft 2, and then the valve cap 3 is sleeved on the top of the valve shaft 2, and finally the fastening bolts are screwed in the upper bolt groove 31, the lower bolt groove 13 and the positioning groove 61 to achieve the limit of the opening and closing of the valve shaft 2. When the opening and closing state of the valve shaft 2 needs to be regulated, it is only necessary to remove the fastening bolts and synchronously rotate the valve cap 3 and the valve shaft 2 to achieve the conversion of their opening and closing states.

[0046] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A novel valve shaft assembly of a butterfly valve, comprising a valve seat (1) and a valve shaft (2) mounted therein, wherein a valve cap (3) is mounted on the top of the valve shaft (2); Features: The valve seat (1) is provided with a valve diameter (11) matching the specifications of the valve shaft (2); the top of the valve seat (1) is provided with a nut groove (12) located on the top side of the valve diameter (11); and the top surface of the valve seat (1) is also provided with a lower bolt groove (13) communicating with the nut groove (12); The inner thread of the nut groove (12) is sleeved with a nut ring (5) located on the outer side of the valve shaft (2), and a sealing gasket (4) located on the outer side of the valve shaft (2) is sandwiched between the nut ring (5) and the bottom surface of the inner side of the nut groove (12); A positioning ring (6) located above the nut ring (5) is sleeved on the inner side of the nut groove (12), a positioning groove (61) is provided at the outer edge of the positioning ring (6), and an upper bolt groove (31) opposite to the lower bolt groove (13) is provided on the valve cap (3).

2. According to claim 1, the valve shaft assembly of a novel butterfly valve is characterized in that: The positioning groove (61) is a quarter-circular groove, and the positioning groove (61) and the lower bolt groove (13) are assembled into a complete circular groove.

3. The valve shaft assembly of a novel butterfly valve according to claim 1 is characterized in that: The upper bolt groove (31) is located directly above the circular groove after the lower bolt groove (13) and the positioning groove (61) are assembled, and a limiting bolt is assembled between the lower bolt groove (13), the positioning groove (61) and the upper bolt groove (31).

4. The valve shaft assembly of a novel butterfly valve according to claim 1 is characterized in that: A sealing ring (21) is fixedly mounted on the outer wall of the valve shaft (2).

5. The valve shaft assembly of a novel butterfly valve according to claim 1 is characterized in that: A rectangular end block is fixedly mounted on the top of the valve shaft (2), and a rectangular end groove matching the specifications of the rectangular end block on the top of the valve shaft (2) is provided on the bottom side of the valve cap (3).

6. The valve shaft assembly of a novel butterfly valve according to claim 1 is characterized in that: The positioning ring (6) is provided with a rectangular groove matching the specifications of the rectangular end block at the top of the valve shaft (2), and the sealing gasket (4) and the nut ring (5) are both movably sleeved on the outer wall of the valve shaft (2).

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