Petrochemical high-viscosity composite sealing device

Abstract

The utility model relates to the technical field of sealing devices, and provides a petrochemical high-viscosity composite sealing device which comprises a composite jacket, a V-shaped spring, a valve rod and a plunger valve body, the valve rod is connected to the plunger valve body, and the composite jacket is arranged on the outer surface of the valve rod and connected with the plunger valve body; a groove is formed in the plunger valve body, the composite jacket is arranged in the groove, and the groove is in a semi-opening design; a cavity is formed in the composite jacket, the V-shaped spring is arranged in the cavity, and the V-shaped spring is located between the valve rod and the plunger valve body. The sealing element has the effects that the sealing element is suitable for high-viscosity crude oil, and abrasion medium contact can be removed.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of sealing devices, in particular to a composite sealing device for petrochemical high-viscosity. BACKGROUND

[0002] O-shaped sealing rings are suitable for being mounted on various mechanical equipment and play a sealing role in a static or moving state in a specified temperature, pressure and different liquid and gas media. Various types of sealing elements are widely used on machine tools, ships, automobiles, aerospace equipment, metallurgical machinery, chemical machinery, engineering machinery, construction machinery, mining machinery, petroleum machinery, plastic machinery, agricultural machinery and various instruments.

[0003] When a valve rod for sealing petrochemical high-viscosity crude oil is used in industrial production, a standard valve rod is generally sealed by an O-shaped sealing ring. This sealing mode is prone to friction and wear, thereby causing leakage, and therefore needs to be improved. CONTENT OF THE UTILITY MODEL

[0004] In order to make the sealing element suitable for high-viscosity crude oil and remove the contact with the wear medium while ensuring the sealing effect, the application provides a composite sealing device for petrochemical high-viscosity.

[0005] The application provides a composite sealing device for petrochemical high-viscosity, which adopts the following technical scheme:

[0006] The composite sealing device for petrochemical high-viscosity comprises a composite jacket, a V-shaped spring, a valve rod and a plunger valve body. The valve rod is connected to the plunger valve body. The composite jacket is arranged on the outer surface of the valve rod and connected to the plunger valve body. The plunger valve body is provided with a groove. The composite jacket is arranged in the groove. The groove is designed as a half-open type. The composite jacket is provided with a cavity. The V-shaped spring is arranged in the cavity. The V-shaped spring is located between the valve rod and the plunger valve body.

[0007] By adopting the above technical scheme, the composite jacket is installed in the half-open groove. This design can make the composite jacket hold the valve rod so that the valve rod is not extruded and scratched. Meanwhile, when the composite jacket is subjected to a force, the V-shaped spring can be deformed to a certain extent and keep a certain compression amount with the sealing surface. The sealing device can remove the contact with the wear medium and is suitable for the application scenario of high-viscosity crude oil under the premise of ensuring the sealing effect.

[0008] Preferably, the V-shaped spring is a double-layer structure. The clamping openings of the two V-shaped springs are arranged in the same direction.

[0009] By adopting the above technical scheme, the double-layer V-shaped spring has better strength and is not prone to damage, thereby prolonging the service life.

[0010] Preferably, a first clamping groove is formed on the valve rod, a first protruding part is arranged on the composite jacket, and the first protruding part is embedded in the first clamping groove; a second clamping groove is arranged in the groove, and a second protruding part is arranged on the composite jacket, and the second protruding part is embedded in the second clamping groove.

[0011] By adopting the above technical scheme, the first protruding part is clamped in the first clamping groove, thereby achieving the close connection between the composite jacket and the valve rod; the second protruding part is clamped in the second clamping groove, thereby achieving the close connection between the composite jacket and the plunger valve body.

[0012] Preferably, a protruding ring is arranged on the plunger valve body, the protruding ring is arranged along the circumference of the plunger valve body and located in the slot of the groove, a gap is left between the protruding ring and the valve rod, and the protruding ring is used to limit the composite jacket from being separated from the groove.

[0013] By adopting the above technical scheme, the existence of the protruding ring can limit the composite jacket from being separated from the groove.

[0014] Preferably, a connecting strip is further arranged, and two ends of the connecting strip are connected to the two V-shaped springs respectively.

[0015] By adopting the above technical scheme, the connecting strip can further connect the two V-shaped springs together, thereby improving the connection stability.

[0016] Preferably, a plurality of first protruding teeth are connected to the outer side wall of one of the V-shaped springs, a plurality of second protruding teeth are connected to the inner side wall of the other V-shaped spring, and the first protruding teeth and the second protruding teeth are staggered.

[0017] By adopting the above technical scheme, the first protruding teeth and the second protruding teeth can cooperate with each other to increase the contact static friction force between the two V-shaped springs, thereby limiting the relative sliding of the two V-shaped springs.

[0018] Preferably, the plunger valve body is made of carbon steel or stainless steel.

[0019] By adopting the above technical scheme, carbon steel or stainless steel has good corrosion resistance.

[0020] Preferably, the composite jacket is made of polytetrafluoroethylene.

[0021] By adopting the above technical scheme, polytetrafluoroethylene has good wear resistance.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] (1) By setting the composite jacket, V-shaped spring, valve stem and plunger valve body, semi-open type groove installation can let the composite jacket hold the valve stem, so that it is not extruded and scratched; at the same time, the V-shaped spring can make the composite jacket maintain a certain compression amount when subjected to force.

[0024] (2) By setting the V-shaped spring as a double-layer structure, the double-layer V-shaped spring has better strength and is not easy to be damaged.

[0025] (3) By setting the convex ring on the plunger valve body, the presence of the convex ring can limit the composite jacket from separating from the groove. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structure schematic view of a sealing device in the embodiment of the present application;

[0027] Figure 2 is a structure schematic view of a double-layer V-shaped spring in another embodiment of the present application.

[0028] Mark: 1, composite jacket; 2, V-shaped spring; 3, valve stem; 4, plunger valve body; 5, groove; 6, cavity; 7, first clamping groove; 8, first protruding part; 9, second clamping groove; 10, second protruding part; 11, convex ring; 12, connecting strip; 13, first protruding tooth; 14, second protruding tooth. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. The present application can be embodied in various different forms, and is not limited to the embodiments described here.

[0030] In the description of the present application, the expressions such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics expressed in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics expressed can be combined in any one or more embodiments or examples in a suitable manner.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0032] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected; can also be detachably connected; or integrated; or mechanically connected. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0033] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. Those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples indicated in the present application without conflict.

[0034] The embodiments of the present application disclose a composite sealing device for petrochemical high viscosity. Referring to Figure 1 , the sealing device comprises a composite jacket 1, a V-shaped spring 2, a valve stem 3 and a plunger valve body 4, the plunger valve body 4 is made of carbon steel or stainless steel, the valve stem 3 is a hollow or solid metal rod, and the valve stem 3 is installed on the plunger valve body 4. The plunger valve body 4 is provided with a groove 5, the groove 5 is designed as a half opening, the composite jacket 1 is located in the groove 5 and is sleeved on the outer surface of the valve stem 3, and the composite jacket 1 is made of polytetrafluoroethylene or other wear-resistant materials. The composite jacket 1 is provided with a cavity 6, the V-shaped spring 2 is installed in the cavity 6 and located between the valve stem 3 and the plunger valve body 4; both ends of the V-shaped spring 2 are connected with the composite jacket 1, and the opening of the V-shaped spring 2 is consistent with the opening of the groove 5.

[0035] The composite jacket 1 is installed with a half-open groove 5, which can make the composite jacket 1 hold the valve stem 3 so that it is not extruded and scratched; at the same time, the V-shaped spring 2 can deform when the composite jacket 1 is subjected to force, and can maintain a certain compression amount with the sealing surface, so that the sealing device can remove the contact of the wear medium under the premise of ensuring the sealing effect, and is suitable for the application scene of high viscosity crude oil.

[0036] In the present embodiment, the V-shaped spring 2 is a double-layer structure, and the clamping openings of the two V-shaped springs 2 are arranged in the same direction. The double-layer V-shaped spring 2 has better strength and is not easy to be damaged, prolonging the service life. Specifically, a first clamping groove 7 is formed on the outer side wall of the valve stem 3, a first protruding part 8 is arranged on the composite jacket 1, and the first protruding part 8 is embedded in the first clamping groove 7, so as to realize the close connection between the composite jacket 1 and the valve stem 3. A second clamping groove 9 is arranged in communication in the groove 5, and a second protruding part 10 is arranged on the composite jacket 1, and the second protruding part 10 is embedded in the second clamping groove 9, so as to realize the close connection between the composite jacket 1 and the plunger valve body 4.

[0037] The protruding ring 11 is arranged on the plunger valve body 4 and is arranged along the circumference of the plunger valve body 4 and is located on the side of the slot opening of the groove 5. The protruding ring 11 is arranged with a gap between the valve rod 3, and the protruding ring 11 is used to limit the composite jacket 1 from being separated from the groove 5, so as to improve the stability of the composite jacket 1.

[0038] In addition, in some embodiments, with reference to Figure 2 The two V-shaped springs 2 are connected together through the connecting strip 12, and the two ends of the connecting strip 12 are connected with the two V-shaped springs 2, respectively. The outer side wall of one V-shaped spring 2 is fixedly connected with a plurality of first protruding teeth 13, and the first protruding teeth 13 are distributed at intervals. The inner side wall of the other V-shaped spring 2 is fixedly connected with a plurality of second protruding teeth 14, and the second protruding teeth 14 are distributed at intervals. The first protruding teeth 13 and the second protruding teeth 14 are in the shape of a right triangle and are staggered in sequence, that is, there is a second protruding tooth 14 between the two adjacent first protruding teeth 13, and there is a first protruding tooth 13 between the two adjacent second protruding teeth 14. The first protruding teeth 13 and the second protruding teeth 14 can increase the contact static friction force between the two V-shaped springs 2, so as to limit the relative sliding of the two V-shaped springs 2.

[0039] The implementation principle of the petrochemical high-viscosity composite sealing device in the embodiment of the application is as follows: the composite jacket 1 is installed in the semi-open groove 5, so that the composite jacket 1 can hold the valve rod 3 and prevent the valve rod 3 from being squeezed out and scratched. The V-shaped spring 2 is installed in the composite jacket 1, and when the composite jacket 1 is subjected to a force, the composite jacket 1 can be deformed to a certain extent and can maintain a certain compression amount with the sealing surface, so that the sealing device can remove the contact with the abrasive medium under the premise of ensuring the sealing effect and is suitable for the application scene of high-viscosity crude oil.

[0040] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A composite type sealing device for petrochemical high viscosity, characterized by, The utility model provides a valve, including composite type jacket (1), V type spring (2), valve rod (3) and plunger valve body (4), valve rod (3) is connected on plunger valve body (4), composite type jacket (1) is located the outer surface of valve rod (3), and is connected with plunger valve body (4);Plunger valve body (4) is set with groove (5), composite type jacket (1) is located in groove (5), and groove (5) is half open design;Composite type jacket (1) is set with cavity (6), V type spring (2) is located in cavity (6), and V type spring (2) is located between valve rod (3) and plunger valve body (4).

2. The composite sealing device for petrochemical high viscosity according to claim 1, characterized in that, V type spring (2) is double-layer structure, and the clamping opening of two V type springs (2) is arranged in the same direction.

3. The composite sealing device for petrochemical high viscosity according to claim 1, wherein Valve rod (3) is set with first clamping groove (7), and composite type jacket (1) is set with first protruding portion (8), and first protruding portion (8) is embedded in first clamping groove (7);Groove (5) is set with second clamping groove (9) in communication, and composite type jacket (1) is set with second protruding portion (10), and second protruding portion (10) is embedded in second clamping groove (9).

4. The composite sealing device for petrochemical high viscosity according to claim 3, wherein Plunger valve body (4) is set with convex ring (11), and convex ring (11) is set along the circumference of plunger valve body (4) and is located in the slot of groove (5), and the gap is left between convex ring (11) and valve rod (3), and convex ring (11) is used to limit composite type jacket (1) from separating from groove (5).

5. The composite sealing device for petrochemical high viscosity according to claim 2, wherein It further includes connecting strip (12), and both ends of connecting strip (12) are connected with two V type springs (2) respectively.

6. The composite sealing device for petrochemical high viscosity according to claim 1, wherein The outer side wall of one V type spring (2) is connected with a plurality of first protruding teeth (13), and the inner side wall of another V type spring (2) is connected with a plurality of second protruding teeth (14), and each first protruding tooth (13) and second protruding tooth (14) are staggered.

7. The composite sealing device for petrochemical high viscosity according to claim 1, wherein Plunger valve body (4) is made of carbon steel or stainless steel material.

8. The composite sealing device for petrochemical high viscosity according to claim 1, wherein Composite type jacket (1) is made of polytetrafluoroethylene.

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