Ultralow-temperature eccentric butterfly valve

Abstract

The utility model discloses an ultralow-temperature eccentric butterfly valve which comprises a valve body unit, and a sealing unit is arranged on the valve body unit. The sealing unit comprises a sealing ring, an elastic ring, fixing blocks and a two-way screw rod, the sealing ring is arranged in the valve body unit, the elastic ring is connected to the outer side of the sealing ring in a sleeving mode, a notch is formed in the bottom of the elastic ring, the two fixing blocks are symmetrically arranged and fixedly connected to the two ends of the notch of the elastic ring correspondingly, and the two-way screw rod is fixedly connected to the two ends of the notch of the elastic ring. The two-way lead screw penetrates through the two sets of fixing blocks, and the two-way lead screw is in threaded connection with the two sets of fixing blocks. According to the ultralow-temperature eccentric butterfly valve, by arranging the sealing unit, the elastic ring can be tightened inwards, then the sealing ring can be driven to be tightened inwards, the inner diameter of the sealing ring can be adjusted, the contact pressure between the sealing ring and the valve plate can be increased, the sealing effect is improved, and the problem of medium leakage is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve technical field, concretely is super low temperature eccentric butterfly valve. BACKGROUND

[0002] Super low temperature eccentric butterfly valve is a kind of special valve specially designed for extreme low temperature working condition, mainly used for the delivery and control of low temperature medium such as liquefied natural gas, liquid nitrogen, liquid oxygen.Eccentric structure design is that the axis of valve rod deviates from the center line of valve plate, forms cam effect.When closing, valve plate and sealing ring are instantaneous contact, reduce friction wear, simultaneously realize zero leakage seal;When opening, valve plate rapidly separates from sealing ring, reduce torque demand.

[0003] In prior art, part of super low temperature eccentric butterfly valve is used in process, because in low temperature environment, sealing ring is prone to shrink, make sealing ring and valve plate contact pressure insufficient, lead to sealing failure, easily cause medium leakage. UTILITY MODEL CONTENTS

[0004] The utility model discloses a super low temperature eccentric butterfly valve, solve the problem that part of super low temperature eccentric butterfly valve is used in process, because in low temperature environment, sealing ring is prone to shrink, make sealing ring and valve plate contact pressure insufficient, lead to sealing failure, easily cause medium leakage.

[0005] Super low temperature eccentric butterfly valve, including valve body unit, the sealing unit is set up on valve body unit, it is used to strengthen the sealing property of valve body unit;

[0006] The sealing unit includes:

[0007] Sealing ring, the sealing ring is arranged in valve body unit;

[0008] Elastic ring, the elastic ring is sleeved on the outside of sealing ring, and the bottom of elastic ring is provided with notch;

[0009] Fixed block, the fixed block is set to two groups, and symmetrically set, two groups the fixed block is fixedly connected at the both ends of the notch of elastic ring respectively;

[0010] Bidirectional screw rod, the bidirectional screw rod is threaded through two groups fixed blocks, and bidirectional screw rod and two groups fixed blocks are all screw connections.

[0011] Preferably, the valve body unit includes:

[0012] Valve body body;

[0013] Valve plate, the valve plate is rotatably connected in valve body body;

[0014] Flange disc, the flange disc is set to two groups, and two groups flange disc are fixedly connected on the both sides of valve body body respectively;

[0015] a sealing seat arranged on the top of the valve body;

[0016] a valve cover fixedly connected on the top of the sealing seat;

[0017] a control box arranged on the sealing seat;

[0018] a rotating disc rotatably connected on one side of the control box.

[0019] Preferably, the inner side of the valve body is provided with a containing groove, and the containing groove is embedded with a sealing ring and an elastic ring.

[0020] Preferably, the valve plate is movably abutted with the sealing ring.

[0021] Preferably, the sealing unit further comprises:

[0022] a connecting rod, one end of the connecting rod being fixedly connected with the bidirectional screw rod;

[0023] a rotating block, the other end of the connecting rod being movably connected with the rotating block;

[0024] a sealing sleeve, the sealing sleeve being sleeved on the outer side of the connecting rod.

[0025] Preferably, the connecting rod is rotatably connected in the sealing sleeve, and the other end of the connecting rod is provided with a clamping block.

[0026] Preferably, the inner side of the rotating block is provided with a clamping groove, the clamping groove being clamped with the clamping block, and the rotating block is provided with a gasket.

[0027] Preferably, the sealing sleeve is fixedly connected on the valve body, and the other end of the sealing sleeve is provided with a recess, the recess being clamped with the gasket.

[0028] Compared with the prior art, the utility model has the beneficial effects that:

[0029] 1、The ultra-low temperature eccentric butterfly valve is provided with a sealing unit, the connecting rod can be rotated by rotating the rotating block, the bidirectional screw rod is further rotated, two groups of fixing blocks are moved towards each other, the elastic ring can be tightened inwards, the sealing ring can be tightened inwards, the inner diameter of the sealing ring can be adjusted, the contact pressure of the sealing ring and the valve plate can be improved, the sealing effect is improved, and the problem of medium leakage is avoided.

[0030] 2. The super-low temperature eccentric butterfly valve is provided with the rotating block capable of moving, the gasket of the rotating block is clamped in the groove of the sealing sleeve to increase the sealing property when the elastic ring does not need to be adjusted, the gasket is pulled out from the groove to enable the rotating block to be rotated when the elastic ring needs to be adjusted, and the rotating block is more flexible to use. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical schemes 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.

[0032] Figure 1 It is a structural schematic diagram of the present application;

[0033] Figure 2 It is a structural schematic diagram of the valve body unit of the present application;

[0034] Figure 3 It is a structural schematic diagram of the sealing unit of the present application;

[0035] Figure 4 It is a sectional schematic diagram of the sealing unit of the present application.

[0036] In the figure: 1, valve body unit; 11, valve body body; 12, valve plate; 13, flange plate; 14, sealing seat; 15, valve cover; 16, control box; 17, rotating disc; 2, sealing unit; 21, sealing ring; 22, elastic ring; 23, fixed block; 24, bidirectional screw rod; 25, connecting rod; 26, rotating block; 27, sealing sleeve. DETAILED DESCRIPTION

[0037] The technical schemes in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0038] Please refer to Figures 1-4 The present application provides a technical scheme:

[0039] Embodiment one

[0040] The super-low temperature eccentric butterfly valve comprises a valve body unit 1, and a sealing unit 2 is arranged on the valve body unit 1, which is used for strengthening the sealing property of the valve body unit 1.

[0041] The sealing unit 2 comprises:

[0042] A sealing ring 21 is arranged in the valve body unit 1;

[0043] An elastic ring 22 is sleeved on the outer side of the sealing ring 21, and the bottom of the elastic ring 22 is provided with a notch;

[0044] Two groups of fixing blocks 23 are symmetrically arranged, and the two groups of fixing blocks 23 are fixedly connected to the two ends of the notch of the elastic ring 22 respectively;

[0045] A bidirectional screw rod 24 penetrates through the two groups of fixing blocks 23, and the bidirectional screw rod 24 is in threaded connection with the two groups of fixing blocks 23.

[0046] Further, the valve body unit 1 comprises:

[0047] A valve body 11;

[0048] A valve plate 12 is rotatably connected in the valve body 11;

[0049] Two groups of flange plates 13 are fixedly connected to the two sides of the valve body 11 respectively;

[0050] A sealing seat 14 is arranged on the top of the valve body 11;

[0051] A valve cover 15 is fixedly connected to the top of the sealing seat 14;

[0052] A control box 16 is arranged on the sealing seat 14;

[0053] A rotating disc 17 is rotatably connected to one side of the control box 16.

[0054] Further, the inner side of the valve body 11 is provided with a containing groove, and the sealing ring 21 and the elastic ring 22 are embedded in the containing groove.

[0055] Further, the valve plate 12 is in movable abutment with the sealing ring 21.

[0056] Embodiment two

[0057] The ultra-low temperature eccentric butterfly valve comprises a valve body unit 1, and a sealing unit 2 is arranged on the valve body unit 1, which is used for enhancing the sealing property of the valve body unit 1;

[0058] The sealing unit 2 comprises:

[0059] A sealing ring 21 is arranged in the valve body unit 1;

[0060] The elastic ring 22 is sleeved on the outer side of the sealing ring 21, and the bottom of the elastic ring 22 is provided with a notch;

[0061] The fixed blocks 23 are provided in two groups and symmetrically arranged, and the two groups of fixed blocks 23 are fixedly connected to the two ends of the notch of the elastic ring 22 respectively;

[0062] The bidirectional screw rod 24 penetrates through the two groups of fixed blocks 23, and the bidirectional screw rod 24 is in threaded connection with the two groups of fixed blocks 23, and one group of fixed blocks 23 is in positive threaded connection with one end of the bidirectional screw rod 24, and the other group of fixed blocks 23 is in reverse threaded connection with the other end of the bidirectional screw rod 24.

[0063] Further, the sealing unit 2 further comprises:

[0064] The connecting rod 25 is fixedly connected to the bidirectional screw rod 24 at one end;

[0065] The rotating block 26 is movably connected to the other end of the connecting rod 25;

[0066] The sealing sleeve 27 is sleeved on the outer side of the connecting rod 25.

[0067] Further, the connecting rod 25 is rotatably connected in the sealing sleeve 27, and the other end of the connecting rod 25 is provided with a clamping block.

[0068] Further, the inner side of the rotating block 26 is provided with a clamping groove, the clamping block is clamped in the clamping groove, and the rotating block 26 is provided with a gasket, the rotating block 26 can drive the connecting rod 25 to rotate, and then the bidirectional screw rod 24 is driven to rotate, and then the two groups of fixed blocks 23 can move towards each other, so that the elastic ring 22 can be tightened inwardly, and then the sealing ring 21 can be tightened inwardly, so that the inner diameter of the sealing ring 21 can be adjusted, so that the contact pressure of the sealing ring 21 and the valve plate 12 can be improved, the sealing effect is improved, and the problem of medium leakage is avoided.

[0069] Further, the sealing sleeve 27 is fixedly connected to the valve body 11, and the other end of the sealing sleeve 27 is provided with a groove, and the gasket is clamped in the groove, and the movable rotating block 26 is arranged, when the elastic ring 22 does not need to be adjusted, the gasket of the rotating block 26 is clamped in the groove of the sealing sleeve 27, so as to increase the sealing performance, when the elastic ring 22 needs to be adjusted, the gasket is pulled out of the groove, so that the rotating block 26 can be rotated, so that the rotating block 26 is more flexible to use.

[0070] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. Cryogenic eccentric butterfly valve comprising a valve body unit (1), characterized in that: The valve body unit (1) is provided with a sealing unit (2) for enhancing the sealing property of the valve body unit (1). The sealing unit (2) comprises: a sealing ring (21) arranged in the valve body unit (1); an elastic ring (22) sleeved on the outside of the sealing ring (21), and the bottom of the elastic ring (22) is provided with a gap; two groups of fixing blocks (23) symmetrically arranged and fixedly connected to the two ends of the gap of the elastic ring (22); a bidirectional screw rod (24) penetrating through the two groups of fixing blocks (23) and threadedly connected with the two groups of fixing blocks (23).

2. The ultra-low temperature eccentric butterfly valve of claim 1, wherein: The valve body unit (1) comprises: a valve body (11); a valve plate (12) rotatably connected in the valve body (11); two groups of flange plates (13) fixedly connected to the two sides of the valve body (11); a sealing seat (14) arranged on the top of the valve body (11); a valve cover (15) fixedly connected to the top of the sealing seat (14); a control box (16) arranged on the sealing seat (14); a rotating disc (17) rotatably connected to one side of the control box (16).

3. The ultra-low temperature eccentric butterfly valve of claim 2, wherein: The inside of the valve body (11) is provided with a containing groove in which the sealing ring (21) and the elastic ring (22) are embedded.

4. The ultra-low temperature eccentric butterfly valve of claim 2, wherein: The valve plate (12) is movably abutted with the sealing ring (21).

5. The ultra-low temperature eccentric butterfly valve of claim 1, wherein: The sealing unit (2) further comprises: a connecting rod (25) fixedly connected at one end with the bidirectional screw rod (24); a rotating block (26) movably connected at the other end with the connecting rod (25); a sealing sleeve (27) sleeved on the outside of the connecting rod (25).

6. The ultra-low temperature eccentric butterfly valve of claim 5, wherein: The connecting rod (25) is rotatably connected in the sealing sleeve (27), and the other end of the connecting rod (25) is provided with a clamping block.

7. The ultra-low temperature eccentric butterfly valve of claim 6, wherein: The inside of the rotating block (26) is provided with a clamping groove in which the clamping block is clamped, and the rotating block (26) is provided with a gasket.

8. The ultra-low temperature eccentric butterfly valve of claim 6, wherein: The sealing sleeve (27) is fixedly connected to the valve body (11), and the other end of the sealing sleeve (27) is provided with a groove in which the gasket is clamped.

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