Butterfly-shaped seal head

Abstract

The utility model discloses a butterfly-shaped end socket, which relates to the technical field of end sockets and comprises a spherical head, the bottom of the spherical head is fixedly connected with a transition piece, the bottom of the transition piece is fixedly connected with a connecting cylinder, and a spherical top plate is arranged in an inner cavity of the spherical head. A first elastic layer is fixedly connected between the outer concave face of the top plate and the inner side wall of the spherical head, a connecting plate is fixedly connected to the inner concave face of the top plate, and the energy absorption structure is arranged in the connecting cylinder. During use, energy generated by pressure of a gas or liquid medium can be absorbed and reduced through the arranged energy absorption structure, so that energy generated by overload pressure can be absorbed under the condition that the pressure of the gas or liquid medium is temporarily overloaded, and the butterfly-shaped seal head is prevented from being damaged by the overload pressure; therefore, gas or liquid leakage caused by damage of the butterfly-shaped end socket can be avoided, and the reliability and the risk resistance of the butterfly-shaped end socket are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of head, especially a butterfly head. BACKGROUND

[0002] The butterfly head, also known as a ball head with a folded edge, is composed of a spherical surface, a cylindrical straight edge with a certain height, and a transition part with a smaller curvature radius than the spherical surface.

[0003] The disc head is a continuous curved surface. At the junction of the three parts, the meridian curvature radius has a sudden change. Due to the change in curvature, there is a bending stress. The superposition of the bending stress and the tensile stress makes the stress of this part stand out from other parts. Compared with the elliptical head, the stress distribution is not as uniform, and it is more commonly used in low-pressure environments. However, its processing is easier than that of the elliptical head, so it is still widely used in the field of pressure vessels.

[0004] The Chinese utility model patent with patent application number CN202122083632.7 records a stainless steel butterfly head. When the pressure impacts the bottom cover upward, the bottom cover transmits the force to the second buffer plate through the second support column at the upper end. The second buffer plate transmits the force to the honeycomb buffer layer. The honeycomb support frame inside the honeycomb buffer layer is subjected to the force generated by the second clamp plate. The honeycomb support frame is a series of continuous honeycomb-shaped net structures arranged in multiple walls, which can disperse external forces from all directions and improve the internal bearing capacity of the stainless steel head. However, the above-mentioned butterfly head disperses internal pressure to all parts of the head through the honeycomb-shaped net structure to avoid damage to the butterfly head caused by excessive local pressure. However, it cannot reduce the kinetic energy generated by the pressure when the pressure is too large, which makes it difficult for the butterfly head to resist the pressure of the overload and be damaged when the pressure is overloaded for a short time. This reduces the ability of the butterfly head to respond to short-term overload and reduces the reliability and risk resistance of the butterfly head. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a butterfly head to solve the problem of poor response to short-term overload of the existing butterfly head and reduce the reliability and risk resistance of the butterfly head.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a butterfly seal head, including spherical head, the bottom fixedly connected with the transition piece of spherical head, the bottom fixedly connected with the connecting barrel of transition piece, the top plate of spherical shape is equipped in the spherical head inner chamber, the first elastic layer is fixedly connected between the outer concave surface of top plate and the inner side wall of spherical head, the connecting plate is fixedly connected on the inner concave surface of top plate, still include the energy absorption structure that is established in the connecting barrel, energy absorption structure and connecting plate are connected;

[0007] The energy absorption structure is used for absorbing and reducing the energy generated by the pressure of gas or liquid medium.

[0008] Preferably, the energy absorption structure includes a plurality of resistance plates distributed from top to bottom, the energy absorption structure further includes a plurality of energy absorption members fixedly connected to the top of the resistance plates, the plurality of energy absorption members are evenly distributed on the top of the resistance plates, and the two adjacent resistance plates are connected by a connecting member.

[0009] Preferably, the connecting member is a first elastic member, the top end of the first elastic member is fixedly connected to the bottom of the upper adjacent resistance plate, the plurality of first elastic members are evenly distributed on the top of the resistance plates, the plurality of first elastic members and the plurality of energy absorption members are staggered distributed, and the top end of the energy absorption member and the bottom of the upper adjacent resistance plate are left with a gap.

[0010] Preferably, the energy absorption member is composed of a straight rod fixedly connected to the top of the resistance plate and a plurality of inclined rods, the plurality of inclined rods are distributed in a ring shape with equal angles around the axis of the straight rod, the inclined rod is inclinedly arranged, and the straight rod and the inclined rod are made of a material that can be easily broken and deformed.

[0011] Preferably, a plurality of support rods are fixedly connected between the top of the connecting plate and the inner concave surface of the top plate, each group of the plurality of support rods is distributed in a ring shape with equal angles on the top surface of the connecting plate, and the support rod is perpendicular to the tangent line at the connecting point between the top end of the support rod and the inner concave surface of the top plate.

[0012] Preferably, a second elastic layer is further fixedly connected to the inner concave surface of the top plate, the second elastic layer is in a spherical shape and covers the inner concave surface of the top plate, and the top end of the plurality of support rods is fixedly connected to the inner concave surface of the second elastic layer.

[0013] In summary, the utility model has the following technical effects and advantages:

[0014] The energy-absorbing structure can absorb the energy generated by the gas or liquid medium pressure, so that the energy generated by the overload pressure can be absorbed when the gas or liquid medium pressure is temporarily overloaded, the butterfly head is prevented from being damaged by the overload pressure, gas or liquid leakage caused by the damage of the butterfly head is avoided, and the reliability and risk resistance of the butterfly head are improved.

[0015] The energy-absorbing structure can absorb the energy generated by the gas or liquid medium pressure, so that the energy generated by the overload pressure can be absorbed when the gas or liquid medium pressure is temporarily overloaded, the butterfly head is prevented from being damaged by the overload pressure, gas or liquid leakage caused by the damage of the butterfly head is avoided, and the reliability and risk resistance of the butterfly head are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 It is a structure schematic view of a butterfly head in the embodiments of the present application.

[0018] Figure 2 It is a first cross-sectional structure schematic view of a butterfly head in the embodiments of the present application.

[0019] Figure 3 It is a second cross-sectional structure schematic view of a butterfly head in the embodiments of the present application.

[0020] Figure 4 It is an enlarged schematic view of A in the embodiments of the present application. Figure 2

[0021] Figure 5 It is an enlarged schematic view of B in the embodiments of the present application. Figure 3

[0022] In the figure: 1, spherical head; 11, transition piece; 12, connecting cylinder; 2, top plate; 3, first elastic layer; 4, connecting plate; 5, energy-absorbing structure; 51, abutting plate; 52, connecting piece; 53, energy-absorbing piece; 531, straight rod; 532, inclined rod; 6, support rod; 7, second elastic layer. DETAILED DESCRIPTION

[0023] ​​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Please refer to Figures 1-5 The butterfly head shown in the figure comprises a spherical head 1, a transition piece 11 fixedly connected at the bottom of the spherical head 1, a connecting cylinder 12 fixedly connected at the bottom of the transition piece 11, a top plate 2 in the spherical shape provided in the inner cavity of the spherical head 1, a first elastic layer 3 fixedly connected between the outer concave surface of the top plate 2 and the inner side wall of the spherical head 1, a connecting plate 4 fixedly connected on the inner concave surface of the top plate 2, and an energy absorption structure 5 provided in the connecting cylinder 12, the energy absorption structure 5 being connected with the connecting plate 4.

[0025] The energy absorption structure 5 is used for absorbing and reducing the energy generated by the pressure of gas or liquid medium.

[0026] Reference Figures 2-5 The energy absorption structure 5 comprises a plurality of abutting plates 51 distributed from top to bottom, and a plurality of energy absorption pieces 53 fixedly connected at the top of the abutting plates 51, the plurality of energy absorption pieces 53 being uniformly distributed at the top of the abutting plates 51, two adjacent abutting plates 51 being connected by a connecting piece 52, and the uppermost abutting plate 51 being connected with the connecting plate 4 by the connecting piece 52.

[0027] Reference Figures 2-5 The connecting piece 52 is a first elastic piece, the top end of the first elastic piece being fixedly connected with the bottom of the upper adjacent abutting plate 51, the plurality of first elastic pieces being uniformly distributed at the top of the abutting plates 51, the plurality of first elastic pieces and the plurality of energy absorption pieces 53 being staggered distributed, and a gap being left between the top end of the energy absorption piece 53 and the bottom of the upper adjacent abutting plate 51.

[0028] Reference Figure 3 and Figure 5 The energy absorption piece 53 is composed of a straight rod 531 fixedly connected at the top of the abutting plate 51 and a plurality of inclined rods 532, the plurality of inclined rods 532 being distributed in a ring shape at equal angles with the axis of the straight rod 531 as the center, the inclined rod 532 being arranged in an inclined manner, and the straight rod 531 and the inclined rod 532 being made of a material that is easy to break and deform.

[0029] Specifically, the energy absorption piece 53 can more fully withstand the pressure from multiple directions, thereby better absorbing the energy generated by the pressure of gas or liquid medium, improving the energy absorption effect, and further effectively improving the reliability and risk resistance of the butterfly head.

[0030] Reference Figure 2The top of the connecting plate 4 and the inner concave surface of the top plate 2 are fixedly connected with a plurality of groups of support rods 6, and each group of the plurality of support rods 6 is annularly and equiangularly distributed on the top surface of the connecting plate 4, and the support rods 6 are all perpendicular to the tangent line at the connecting point between the top end of the support rod 6 and the inner concave surface of the top plate 2.

[0031] Specifically, the pressure generated by the gas or liquid medium can be more uniformly conducted to the top plate 2 and the spherical head 1, the local pressure on the spherical head 1 is reduced, the safety of the spherical head 1 is protected, and the reliability of the butterfly head is improved.

[0032] Reference Figure 3 Further comprising a second elastic layer 7 fixedly connected to the inner concave surface of the top plate 2, the second elastic layer 7 is spherical and covers the inner concave surface of the top plate 2, and the top end of the plurality of support rods 6 is fixedly connected to the inner concave surface of the second elastic layer 7.

[0033] Specifically, the first elastic layer 3 and the first elastic member can cooperate to improve the buffering capacity of the butterfly head, further reliably protect the safety of the spherical head 1, and improve the reliability and practicality of the butterfly head.

[0034] Working principle: the lowermost abutting plate 51 is pushed upward by the uppermost abutting plate 51 after being subjected to the pressure from the gas or liquid medium, the uppermost abutting plate 51 conducts the pressure to the connecting plate 4, the connecting plate 4 conducts the pressure upward to the top plate 2 through the support rods 6 and the second elastic layer 7, and the top plate 2 conducts the pressure to the first elastic layer 3 through the first elastic layer 3. In the pressure conduction process, the first elastic member, the second elastic layer 7 and the first elastic layer 3 cooperate to produce a buffering effect to reduce the pressure and impact on the spherical head 1, thereby protecting the safety of the butterfly head.

[0035] When the gas or liquid pressure is overloaded for a short time, the first elastic member will be compressed to a greater extent until the straight rod 531 and the inclined rod 532 collide with the abutting plate 51 adjacent to the upper side and are deformed and broken, thereby absorbing part of the energy generated by the gas or liquid pressure, avoiding damage to the spherical head 1 caused by the impact of the overload pressure, avoiding damage to the spherical head 1 caused by the leakage of the gas or liquid medium, and improving the reliability and pressure resistance and impact resistance of the butterfly head.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application shall be included in the protection scope of the present application.

Claims

1. A butterfly-shaped end cap, comprising a spherical end cap (1), characterized in that: The bottom of the spherical head (1) is fixedly connected to a transition piece (11), and the bottom of the transition piece (11) is fixedly connected to a connecting cylinder (12). The inner cavity of the spherical head (1) is provided with a spherical top plate (2). A first elastic layer (3) is fixedly connected between the outer concave surface of the top plate (2) and the inner sidewall of the spherical head (1). A connecting plate (4) is fixedly connected to the inner concave surface of the top plate (2). The spherical head (1) also includes an energy-absorbing structure (5) provided in the connecting cylinder (12). The energy-absorbing structure (5) is connected to the connecting plate (4). The energy-absorbing structure (5) is used to absorb and reduce the energy generated by the pressure of the gas or liquid medium.

2. The butterfly-shaped end cap according to claim 1, characterized in that: The energy-absorbing structure (5) includes several abutments (51) distributed from top to bottom. The energy-absorbing structure (5) also includes multiple energy-absorbing components (53) fixedly connected to the top of the abutments (51). The multiple energy-absorbing components (53) are evenly distributed on the top of the abutments (51). Two adjacent abutments (51) are connected by connectors (52). The uppermost abutment (51) and the connecting plate (4) are connected by connectors (52).

3. A butterfly-shaped end cap according to claim 2, characterized in that: The connector (52) is a first elastic member. The top end of the first elastic member is fixedly connected to the bottom of the adjacent upper plate (51). Multiple first elastic members are evenly distributed on the top of the plate (51). Multiple first elastic members and multiple energy-absorbing members (53) are staggered. A gap is left between the top end of the energy-absorbing member (53) and the bottom of the adjacent upper plate (51).

4. A butterfly-shaped end cap according to claim 3, characterized in that: The energy-absorbing component (53) consists of a straight rod (531) and multiple inclined rods (532) fixedly connected to the top of the abutment plate (51). The multiple inclined rods (532) are distributed in a ring at equal angles with the axis of the straight rod (531) as the center. The inclined rods (532) are inclined. Both the straight rod (531) and the inclined rods (532) are made of a material that is easily broken and deformable.

5. A butterfly-shaped end cap according to claim 4, characterized in that: Multiple sets of support rods (6) are fixedly connected between the top of the connecting plate (4) and the concave surface of the top plate (2). Each set of multiple support rods (6) is distributed in a ring at equal angles on the top surface of the connecting plate (4). The support rods (6) are all perpendicular to the tangent at the connection point between their top and the concave surface of the top plate (2).

6. A butterfly-shaped end cap according to claim 5, characterized in that: It also includes a second elastic layer (7) fixedly connected to the concave surface of the top plate (2). The second elastic layer (7) is spherical and covers the concave surface of the top plate (2). The top ends of the plurality of support rods (6) are fixedly connected to the concave surface of the second elastic layer (7).

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