Adjustable sealed self-control low-torque plug valve

Abstract

The utility model discloses an adjustable sealing self -control low torsion plug valve, including valve body, install the valve core subassembly on valve body, the valve core subassembly includes base and valve rod, and still be equipped with the packing cavity on the base, one side of base is equipped with first gland and second gland, when one end of valve rod is penetrated after packing cavity, utilize first gland and pack tightly in packing cavity, utilize second gland and base connection to make second gland give first gland and exert pre -tightening force, above all, first utilize bolt and base connection to make first gland and pack tightly in packing cavity after, then utilize bolt and connect second gland with base, with the tightening of bolt to make second gland press on first gland, and can provide reliable pre -tightening force for first gland, especially, only need to rotate the bolt on second gland to realize the adjustment of pre -tightening force, and then solve the problem that the pre -tightening force of disc spring is deficient after long -term use.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely is a kind of adjustable sealing self-control low torsion plug valve. BACKGROUND

[0002] The existing plug valve, such as the one with the announcement number CN209540079U, to ensure the pre-tightening force of the packing, the disc spring is pressed in the packing cavity by a single gland, and the packing is provided with pre-tightening force by the elastic force of the disc spring. Because the elastic performance of the disc spring decreases after long use, and the internal organization of the material is also brittle due to long-term stress, the disc spring cracks or deforms, thereby affecting the pre-tightening force of the disc spring on the packing. SUMMARY

[0003] The utility model discloses a kind of adjustable sealing self-control low torsion plug valve, to solve the problem raised in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of adjustable sealing self-control low torsion plug valve, including valve body, valve core assembly installed on the valve body;The valve core assembly includes base and valve stem, and the base is also provided with packing cavity, one side of the base is equipped with first gland and second gland;When one end of the valve stem penetrates the packing cavity, the packing is pressed in the packing cavity using the first gland, and then the second gland is connected with the base, so that the second gland applies pre-tightening force to the first gland.

[0005] As a preferred technical scheme of the utility model: the base is equipped with first mounting surface and second mounting surface, and the first mounting surface is lower than the second mounting surface;And the first gland is fixed on the first mounting surface by bolt, and the second gland is fixed on the second mounting surface.

[0006] As a preferred technical scheme of the utility model: the first gland and the second gland are fixed on the base in cross shape.

[0007] As a preferred technical scheme of the utility model: the second gland and the first gland are also equipped with gland gasket therebetween.

[0008] As a preferred technical scheme of the utility model: the valve stem is linked with the indicating part after penetrating the second gland.

[0009] As a preferred technical scheme of the utility model: the second gland is also equipped with first slot hole and second slot hole, and the indicating part is also equipped with through hole.

[0010] As the preferred technical scheme of the utility model: still be equipped with first plane and second plane on the second gland, and the first plane is higher than the second plane, and the first plane prevents the indicating piece from rotating through being equipped with.

[0011] As the preferred technical scheme of the utility model: the valve stem is still equipped with ring groove, the snap ring is installed in the ring groove, so that the indicating piece is fixed on the valve stem.

[0012] As the preferred technical scheme of the utility model: the valve stem is connected with the connecting shaft after passing through the snap ring.

[0013] As the preferred technical scheme of the utility model: the valve body is still equipped with support.

[0014] The beneficial effects of the utility model are that: since the equipment utilizes two glands, the first gland is used to compress the filler in the filler cavity, and then the second gland is used to provide pre-tightening force for the first gland, compared with using disc spring to provide pre-tightening force, the pre-tightening force is more durable, and the problem of pre-tightening force failure caused by disc spring aging is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the main body structure schematic diagram of the utility model;

[0016] Figure 2 It is the exploded schematic diagram of the main body structure of the utility model;

[0017] Figure 3 It is the cross section structure schematic diagram of the valve core assembly of the utility model;

[0018] Figure 4 It is the overhead view of the valve core assembly of the utility model;

[0019] Figure 5 It is the one side structure schematic diagram of the valve core assembly after being exploded of the utility model;

[0020] Figure 6 It is the other side structure schematic diagram of the valve core assembly after being exploded of the utility model;

[0021] Figure 7 It is the main body structure schematic diagram of the second gland of the utility model;

[0022] Figure 8 It is the main body structure schematic diagram of the indicating piece of the utility model.

[0023] In the figure: 1, valve body; 2, support; 3, valve core assembly; 30, base; 31, valve stem; 32, first mounting surface; 33, second mounting surface; 34, first gland; 35, second gland; 36, gland gasket; 37, indicating element; 38, snap ring; 39, connecting shaft; 310, ring groove; 311, packing cavity; 312, first plane; 313, first slot hole; 314, second plane; 315, second slot hole; 316, through hole. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "upper surface" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] Please refer to Figures 1-8 The present application provides an embodiment: a low-torque plug valve with adjustable sealing and self-control, comprising a valve body 1 and a valve core assembly 3 mounted on the valve body 1; the valve core assembly 3 comprises a base 30 and a valve stem 31, and the base 30 is further provided with a packing cavity 311, and one side of the base 30 is provided with a first gland 34 and a second gland 35; when one end of the valve stem 31 penetrates the packing cavity 311, the first gland 34 is used to compress the packing in the packing cavity 311, and then the second gland 35 is connected with the base 30 to allow the second gland 35 to apply a pre-tightening force to the first gland 34.

[0026] In summary, first, the bolt is connected with the base 30 to facilitate the first gland 34 to compress the packing in the packing cavity 311, and then the second gland 35 is connected with the base 30 by the bolt, and the second gland 35 is pressed on the first gland 34 as the bolt is tightened, thereby providing reliable pre-tightening force for the first gland 34; in particular, only the bolt on the second gland 35 needs to be rotated to adjust the pre-tightening force, thereby solving the problem of insufficient pre-tightening force of the disc spring after long use.

[0027] Further, since the base 30 is provided with the first mounting surface 32 and the second mounting surface 33, and the first mounting surface 32 is lower than the second mounting surface 33; and the first gland 34 is fixed on the first mounting surface 32 by bolts, and the second gland 35 is fixed on the second mounting surface 33 by bolts. The arrangement of two mounting surfaces can make the two glands staggered with each other, so as to avoid the problem of mutual interference of the two glands during installation. Specifically, the first gland 34 and the second gland 35 are fixed on the base 30 in a cross shape.

[0028] Since the second gland 35 is provided between the first gland 34, the direct contact of the two glands can be avoided.

[0029] On the basis of the above scheme, since the valve stem 31 is connected with the indicating part 37 after penetrating the second gland 35, the opening or closing information of the valve can be displayed to the user in a mechanical linkage manner by following the linkage of the valve stem 31 with the indicating part 37.

[0030] At the same time, since the second gland 35 is provided with the first slot hole 313 and the second slot hole 315, and the indicating part 37 is provided with the through hole 316, the position of the indicating part 37 can be locked by connecting the two slot holes with the through hole 316. Specifically, when the through hole 316 coincides with the first slot hole 313, the indicating part 37 is locked on the second gland 35 by connecting the bolts penetrating the first slot hole 313 and the through hole 316 with the nuts, so as to ensure that the opening or closing state of the valve can be maintained for a long time, and even if the valve is touched by external force, the opening or closing state of the valve will not be affected.

[0031] In order to avoid the phenomenon of excessive rotation of the indicating part 37, the second gland 35 is further provided with the first plane 312 and the second plane 314, and the first plane 312 is higher than the second plane 314, and the first plane 312 is arranged to prevent the rotation of the indicating part 37. Therefore, when one end of the indicating part 37 abuts against the bottom of the first plane 312, the rotation of the indicating part 37 can be prevented, so as to avoid the problem that the opening or closing state of the valve is affected by excessive rotation.

[0032] Since the valve stem 31 is further provided with the ring groove 310, the retaining ring 38 is installed in the ring groove 310 to fix the indicating part 37 on the valve stem 31, so that the indicating part 37 can be reliably located on the valve stem 31, and the linkage between the indicating part 37 and the valve stem 31 can be ensured to be synchronous.

[0033] In order to facilitate the valve core assembly 3 and the driving device connection with the outside, to realize the automatic opening or closing of the valve, the valve stem 31 is connected with the connecting shaft 39 after passing through the snap ring 38. Wherein, the driving device can be electric actuator or pneumatic actuator.

[0034] At the same time, the valve body 1 is also provided with the bracket 2, thus, the driving device is provided with a reliable installation station, further ensuring the driving device to promote the opening and closing of the valve.

[0035] The above describes the embodiments of the present application in detail in combination with the drawings, but the present application is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, and still fall within the protection scope of the present application.

Claims

1. An adjustable, self-sealing, low-torque plug valve, characterized in that: Includes a valve body (1) and a valve core assembly (3) mounted on the valve body (1); The valve core assembly (3) includes a base (30) and a valve stem (31), and the base (30) is also provided with a packing cavity (311). A first pressure cap (34) and a second pressure cap (35) are provided on one side of the base (30). After one end of the valve stem (31) passes through the packing cavity (311), the first gland (34) is used to press the packing into the packing cavity (311), and then the second gland (35) is used to connect with the base (30) so that the second gland (35) applies a preload to the first gland (34).

2. The adjustable sealing self-regulating low-torque plug valve according to claim 1, characterized in that: The base (30) is provided with a first mounting surface (32) and a second mounting surface (33), and the first mounting surface (32) is lower than the second mounting surface (33); the first cover (34) is fixed to the first mounting surface (32) by bolts, and the second cover (35) is fixed to the second mounting surface (33).

3. The adjustable sealing self-regulating low-torque plug valve according to claim 2, characterized in that: The first pressure cap (34) and the second pressure cap (35) are fixed to the base (30) in a cross shape.

4. The adjustable sealing self-regulating low-torque plug valve according to claim 3, characterized in that: A pressure cover gasket (36) is also provided between the second pressure cover (35) and the first pressure cover (34).

5. An adjustable sealing self-regulating low-torque plug valve according to any one of claims 1-4, characterized in that: The valve stem (31) passes through the second pressure cap (35) and is linked with the indicator (37).

6. The adjustable sealing self-regulating low-torque plug valve according to claim 5, characterized in that: The second pressure cap (35) is also provided with a first slot (313) and a second slot (315), and the indicator (37) is also provided with a through hole (316).

7. The adjustable sealing self-regulating low-torque plug valve according to claim 6, characterized in that: The second pressure cap (35) is also provided with a first plane (312) and a second plane (314), and the first plane (312) is higher than the second plane (314), and the first plane (312) prevents the indicator (37) from rotating.

8. The adjustable sealing self-regulating low-torque plug valve according to claim 7, characterized in that: The valve stem (31) is also provided with an annular groove (310), and a retaining ring (38) is installed in the annular groove (310) to fix the indicator (37) on the valve stem (31).

9. The adjustable sealing self-regulating low-torque plug valve according to claim 8, characterized in that: The valve stem (31) passes through the retaining ring (38) and is connected to the connecting shaft (39).

10. An adjustable sealing self-regulating low-torque plug valve according to claim 9, characterized in that: The valve body (1) is also provided with a bracket (2).

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