A breakaway valve

Abstract

The present invention provides a breakaway valve, comprising a left valve body, a right valve body, a left sealing device, a right sealing device and a driving member, wherein a left flow chamber is provided in the left valve body, a right flow chamber is provided in the right valve body, a left sealing device is provided in the left flow chamber, a right sealing device is provided in the right flow chamber, and a driving member is connected to the right sealing device, wherein, in a connected state, the right valve body is connected to the left valve body, and the left sealing device and the right sealing device abut against each other, so that a gap is provided between the left sealing device, the right sealing device and the left flow chamber, the right flow chamber, and in a breakaway state, the left valve body and the right valve body move away from each other under the action of an external force, and the driving member drives the left sealing device and the right sealing device to separate, so that the left sealing device and the right sealing device are close to each other, so that the left sealing device and the right sealing device are sealed from the left flow chamber, the right flow chamber.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a breakaway valve. Background Art

[0002] In pipeline systems that transport various types of fluid media, break valves are generally installed on the pipelines to protect them from being broken in unexpected situations (such as landslides, ship drifting) and to prevent pipeline ruptures and leakage accidents.

[0003] A breakaway valve is a device that can be broken into two sections under external force, and both sections have a self-sealing function. Installing a breakaway valve in a pipeline system of a fluid medium can provide better protection for the pipeline system.

[0004] In the prior art, the valve disc in the left valve body of the breakaway valve and the valve disc in the right valve body are mostly butted against each other through two connecting rods. When the separation distance between the valve bodies is short, the connecting rods will always be butted against each other, resulting in the valve disc not closing properly, the valve failing to seal, and medium leakage. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is that in the prior art, the valve disc in the left valve body and the valve disc in the right valve body of the breakaway valve are mostly butted against each other through two connecting rods. When the separation distance between the valve bodies is short, the connecting rods will always be butted against each other, resulting in the valve disc not being able to close properly, the valve failing to perform a sealing function, and medium leakage.

[0006] To this end, the present invention provides a breakaway valve, comprising:

[0007] A left valve body, in which a left flow chamber is provided;

[0008] a right valve body, in which a right flow cavity is arranged, and the right valve body is connected to the left valve body so that the left flow cavity is in communication with the right flow cavity;

[0009] A left sealing device and a right sealing device, wherein the left sealing device is arranged in the left flow cavity, and the right sealing device is arranged in the right flow cavity;

[0010] A driving member connected to the right sealing device;

[0011] Wherein, in the connected state, the left sealing device and the right sealing device abut against each other, so that a gap is provided between the left sealing device, the right sealing device and the left flow cavity, the right flow cavity;

[0012] In the pulled-off state, the left valve body and the right valve body move away from each other under the action of external force, and the driving member drives the left sealing device to separate from the right sealing device, so that the left sealing device and the right sealing device approach the left flow cavity and the right flow cavity respectively under the action of external force until they abut against each other.

[0013] Optionally, the left sealing device comprises:

[0014] A left support frame is connected to the left flow chamber, and a space suitable for fluid flow is provided between the two;

[0015] A left valve flap is slidably connected to the left support frame;

[0016] The left elastic member has an elastic force that drives the left valve flap to move toward the right sealing device in the connected state. In the broken state, the left valve flap moves toward the right sealing device under the action of the elastic force until it abuts against the left valve seat in the left flow chamber.

[0017] Optionally, the right sealing device comprises:

[0018] A right support frame is connected to the right flow chamber, and a space suitable for fluid flow is provided between the two;

[0019] A right valve disc is slidably connected to the right support frame;

[0020] The right elastic member has an elastic force driving the right valve flap to move toward the left valve flap in the connected state. In the broken state, the right valve flap moves toward the left valve flap under the action of the elastic force until it abuts against the right valve seat in the right flow chamber.

[0021] Optionally,

[0022] The left sealing device further comprises a left connecting rod, wherein the left connecting rod is connected to the left valve flap;

[0023] The right sealing device further comprises a right connecting rod, wherein the right connecting rod is connected to the right valve disc;

[0024] In the connected state, the left connecting rod abuts against the right connecting rod to squeeze the left elastic member and the right elastic member, so that the left valve flap, the right valve flap and the left valve seat and the right valve seat are separated;

[0025] In the pulled-off state, when the left valve body and the right valve body move away from each other under the action of an external force, the driving member drives the left connecting rod to separate from the right connecting rod.

[0026] Optionally, the right sealing device also includes

[0027] A support seat, fixedly connected to the right valve flap, and the support seat is provided with two through holes on a side away from the right support frame;

[0028] A pin shaft passes through the two through holes of the support seat and is fixedly connected thereto, and an end of the right connecting rod is movably connected to the surface of the pin shaft;

[0029] In the broken state, the driving member drives the right connecting rod to rotate around the pin axis so that the left connecting rod is separated from the right connecting rod.

[0030] Optionally, the driving member is a torsion spring.

[0031] Optionally, the left support frame and the right support frame are truncated cone-shaped, and the large end of the left support frame and the large end of the right support frame are arranged close to each other.

[0032] Optionally, a through cavity is provided inside the left support frame and the right support frame, and the left valve flap and the right valve flap are provided in the through cavity.

[0033] Optionally, a ring is provided in the through cavity in the left support frame and the through cavity in the right support frame, a left elastic member is provided between the left valve flap and the ring, and a right elastic member is provided between the right valve flap and the ring.

[0034] Optionally, a graphite gasket is provided at the connection between the left valve body and the right valve body.

[0035] The breakaway valve provided by the present invention has the following advantages:

[0036] 1. The present invention provides a breakaway valve, comprising a left valve body, a right valve body, a left sealing device, a right sealing device and a driving member, wherein a left flow chamber is provided in the left valve body, a right flow chamber is provided in the right valve body, a left sealing device is provided in the left flow chamber, a right sealing device is provided in the right flow chamber, and a driving member is connected to the right sealing device, wherein, in a connected state, the right valve body is connected to the left valve body, and the left sealing device and the right sealing device abut against each other, so that a gap is provided between the left sealing device, the right sealing device and the left flow chamber, the right flow chamber, and in a breakaway state, the left valve body and the right valve body move away from each other under the action of an external force, and the driving member drives the left sealing device and the right sealing device to separate, so that the left sealing device and the right sealing device are close to each other, so that the left sealing device and the right sealing device are sealed from the left flow chamber, the right flow chamber.

[0037] The breakaway valve of this structure is provided with a left sealing device in a left flow chamber, a right sealing device in a right flow chamber, and a driving member connected to the right sealing device, so that when the breakaway valve is in a breakaway state, the left valve body and the right valve body move away from each other under the action of an external force, and when the separation distance between the valve bodies is short, the driving member drives the left sealing device to separate from the right sealing device, thereby facilitating the left sealing device and the right sealing device to approach the left flow chamber and the right flow chamber respectively under the action of an external force until they abut against each other, so as to realize the sealing of the left valve body and the right valve body after the breakaway valve is broken.

[0038] 2. The present invention provides a break valve, wherein the left sealing device comprises a left support frame, a left valve flap and a left elastic member, wherein the left support frame is connected to the left flow chamber, and a gap suitable for fluid circulation is provided between the two; the left valve flap is slidably connected to the left support frame; in the connected state, the left elastic member has an elastic force driving the left valve flap to move toward the right sealing device, and in the break state, the left valve flap moves toward the right sealing device under the action of the elastic force until it abuts against the left valve seat in the left flow chamber.

[0039] The breakaway valve of this structure is provided with a left elastic member, and when the breakaway valve is in a connected state, the left elastic member has an elastic force driving the left valve flap to move toward the right sealing device. In the breakaway state, the left valve flap moves toward the right sealing device under the action of the elastic force until it abuts against the left valve seat in the left flow chamber, thereby enabling the left valve body to be sealed after the breakaway valve is broken.

[0040] 3. The present invention provides a break valve, wherein the right sealing device comprises a right support frame, a right valve flap, a right elastic member, a right valve seat and a right connecting rod, the right support frame is connected to the right flow chamber, and a gap suitable for fluid flow is provided therebetween, the right valve flap is slidably connected to the right support frame, in the connected state, the right elastic member has an elastic force driving the right valve flap to move in the direction of the left valve flap, and in the break state, the right valve flap moves in the direction of the left valve flap under the action of the elastic force until it abuts against the right valve seat in the right flow chamber.

[0041] The breakaway valve of this structure is provided with a right elastic member, and in the connected state, the right elastic member has an elastic force driving the right valve flap to move in the direction of the left valve flap. In the breakaway state, the right valve flap moves in the direction of the left valve flap under the action of the elastic force until it abuts against the right valve seat in the right flow chamber, thereby enabling the right valve body to be sealed after the breakaway valve is broken.

[0042] 4. The present invention provides a break valve, wherein the right sealing device further comprises a support seat and a pin shaft, the support seat being fixedly connected to the right support frame, two through holes being arranged on the side of the support seat away from the right support frame, both ends of the pin shaft passing through the two through holes and being fixedly connected thereto, and the end of the right connecting rod being movably connected to the surface of the pin shaft, and in the break state, the driving member drives the right connecting rod to rotate around the axis of the pin shaft to separate the left connecting rod from the right connecting rod.

[0043] The breakaway valve of this structure is arranged such that in the breakaway state, the driving member drives the right connecting rod to rotate around the axis of the pin shaft, so that the driving member can drive the right connecting rod to be misaligned with the left connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A schematic diagram of the internal structure of a breakaway valve provided in an embodiment of the present invention;

[0046] Figure 2 A schematic diagram of the internal structure of a breakaway valve provided in an embodiment of the present invention in a breakaway state;

[0047] Figure 3 It is a structural schematic diagram of the left valve body of the breakaway valve provided in an embodiment of the present invention in a breakaway state;

[0048] Figure 4 It is a structural schematic diagram of the right valve body of the breakaway valve provided in an embodiment of the present invention in a breakaway state;

[0049] Figure 5 It is a structural schematic diagram of a driving member and a right connecting rod when the breakaway valve provided in an embodiment of the present invention is in a connected state;

[0050] Figure 6 It is a structural schematic diagram of a driving member and a right connecting rod of a breakaway valve provided in an embodiment of the present invention in a breakaway state;

[0051] Description of reference numerals:

[0052] 1-Left valve body;

[0053] 2-right valve body;

[0054] 3-left sealing device; 31-left supporting frame; 32-left valve disc; 33-left elastic member; 34-left valve seat; 35-left connecting rod;

[0055] 4-right sealing device; 41-right support frame; 42-right valve disc; 43-right elastic member; 44-right valve seat; 45-right connecting rod; 46-support seat; 47-pin shaft;

[0056] 5- Driving member. DETAILED DESCRIPTION

[0057] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0059] Example

[0060] This embodiment provides a breakaway valve, such as Figure 1 and Figure 2 As shown, it includes a left valve body 1, a right valve body 2, a left sealing device 3, a right sealing device 4 and a driving member 5. The left valve body 1 is provided with a left flow cavity, the right valve body 2 is provided with a right flow cavity, the left sealing device 3 is provided in the left flow cavity, the right sealing device 4 is provided in the right flow cavity, and the driving member 5 is connected to the right sealing device 4. The breakaway valve has a connected state and a breakaway state in which it is broken by external force.

[0061] Further, such as Figure 2 and Figure 3As shown, the left sealing device 3 includes a left support frame 31, a left valve disc 32, a left elastic member 33, a left valve seat 34 and a left connecting rod 35. The left support frame 31 is connected to the mounting ring through a plurality of connecting plates, and the mounting ring is connected to the wall of the left flow chamber, thereby ensuring that there is a gap for fluid to pass between the left support frame 31 and the left flow chamber. The number of connecting plates can be set according to the use requirements, such as two, three or other numbers. The left support frame 31 is truncated cone-shaped and has a through cavity inside. The inner wall of the through cavity is also fixedly connected to a collar through a plurality of connecting plates. The left end of the left valve disc 32 is columnar and slidably connected inside the collar. At the same time, the right end of the collar is stepped, and the right end of the left valve disc 32 is disc-shaped. A left elastic member 33 is arranged between the collar and the left valve disc 32. The left end of the left elastic member 33 is sleeved on the right end of the stepped collar, and the right end of the left elastic member 33 abuts against the right end of the disc-shaped left valve disc 32. When the right end of the left valve disc 32 is attached to the left support frame 31, the left elastic member 33 is compressed, so that the left elastic member 33 has an elastic force to drive the left valve disc 32 to move rightward until the right end of the left valve disc 32 abuts against the left valve seat 34, so as to achieve the sealing of the left flow cavity in the left valve body 1. One end of the left connecting rod 35 is connected to the right end of the left valve disc 32, and the other end of the left connecting rod 35 is arranged toward the right sealing device 4.

[0062] Similarly, if Figure 2 and Figure 4 As shown, the right sealing device 4 includes a right support frame 41, a right valve disc 42, a right elastic member 43, a right valve seat 44 and a right connecting rod 45. The right support frame 41 is also connected to the mounting ring through a plurality of connecting plates, and the mounting ring is connected to the inner wall of the right flow cavity, thereby ensuring that there is a gap for fluid to pass between the right support frame 41 and the right flow cavity. The number of connecting plates can be set according to the use requirements, such as two, three or other numbers. The right support frame 41 is truncated and has a through cavity inside. The inner wall of the through cavity is also fixedly connected to a collar through a plurality of connecting plates. The right end of the right valve disc 42 is columnar and slidably connected inside the collar. At the same time, the left end of the collar is stepped, and the left end of the right valve disc 42 is disc-shaped. A right elastic member 43 is arranged between the collar and the right valve disc 42. The right end of the right elastic member 43 is sleeved on the left end of the stepped collar, and the left end of the right elastic member 43 abuts against the left end of the disc-shaped right valve disc 42. When the left end of the right valve disc 42 is attached to the right support frame 41, the right elastic member 43 is compressed, so that the right elastic member 43 has an elastic force to drive the right valve disc 42 to move leftward until the left end of the right valve disc 42 abuts against the right valve seat 44, so as to achieve the sealing of the right flow cavity in the right valve body 2. One end of the right connecting rod 45 is connected to the left end of the right valve disc 42, and the other end of the right connecting rod 45 is arranged toward the left sealing device 3.

[0063] When the breakaway valve is in the connected state, Figure 1As shown, the right connecting rod 45 and the left connecting rod 35 abut against each other, thereby compressing the right elastic member 43 and the left elastic member 33, so that the right end of the left valve flap 32 is attached to the left support frame 31, and the left end of the right valve flap 42 is attached to the right support frame 41, so as to ensure the flow of the break valve.

[0064] like Figure 4 and Figure 5 As shown, the right sealing device 4 also includes a support seat 46 and a pin shaft 47. The support seat 46 is fixedly connected to the right valve disc 42. Two through holes are provided on the side of the support seat 46 away from the right valve disc 42. Both ends of the pin shaft 47 pass through the two through holes and are fixed to the support seat 46, and the end of the right connecting rod 45 is movably connected to the surface of the pin shaft 47. The driving member 5 is a torsion spring. The fixed end of the torsion spring is sleeved on the surface of the pin shaft 47, and the driving end of the torsion spring abuts against the surface of the right connecting rod 45. When the right connecting rod 45 and the left connecting rod 35 abut against each other, the torsion spring is in a force storage state, so that the torsion spring has an elastic force to drive the right connecting rod 45 to rotate relative to the pin shaft 47. The torsion spring is a prior art and its working principle will not be described in detail.

[0065] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, when the breakaway valve is in the connected state, the right connecting rod 45 and the left connecting rod 35 abut against each other, the right elastic member 43 and the left elastic member 33 are compressed, and the driving member 5 is in the state of storing force. At this time, the right end of the left valve flap 32 is attached to the left support frame 31, and the left end of the right valve flap 42 is attached to the right support frame 41. When the breakaway valve is pulled by an external force, causing the left valve body 1 and the right valve body 2 to move away from each other, and the separation distance between the left valve body 1 and the right valve body 2 is short, the left and right connecting rods in the prior art will always be against each other, causing the left and right valve flaps to not close properly, and the valve cannot play a sealing role, resulting in leakage of the medium. The present invention is provided with a driving member 5, and when the separation distance between the left valve body 1 and the right valve body 2 is short, the left elastic member 33 and the right elastic member 43 are cylindrical springs and belong to the same part, and the elastic forces of the two can be regarded as consistent, acting on the valve flap. The driving member 5 is a torsion spring elastic member, which acts on the right connecting rod 45. Initially, the friction force of the left connecting rod 35 and the right connecting rod 45 abuts against each other to balance the elastic force of the driving member 5. At the moment of disengagement, the friction force does not exist. At the same time, the left and right elastic members drive the connecting rods to abut against each other. However, after the friction force does not exist at this time, the driving member 5 drives the right connecting rod 45 to deflect. After deflecting at a small angle, it will abut against the bevel set at the upper end of the left connecting rod 35, so that the right connecting rod 45 swings down due to the misalignment, so that the valve flap can be closed at a small disengagement distance. It can be understood that the friction force does not exist at the moment of disengagement, which means that the moment of disengagement in the field working condition is transient. At this time, it can be understood that the elastic member has not started to work, so the left connecting rod 35 and the right connecting rod 45 are out of contact.

[0066] The driving member 5 drives the right connecting rod 45 to rotate relative to the pin 47, thereby causing the right connecting rod 45 to be misaligned with the left connecting rod 35. The left valve flap 32 is acted upon by the left elastic member 33, and the right valve flap 42 is acted upon by the right elastic member 43. When the right connecting rod 45 is disengaged from the left connecting rod 35, the left valve flap 32 and the right valve flap 42 are closed to the sealing position to achieve a sealing effect. At the same time, this structural design prevents the right connecting rod 45 from extending beyond the structural length of the end face of the right valve body 2 when the right valve flap 42 is closed, and the right connecting rod 45 directly contacts the ground when the right valve body 2 falls, indirectly causing damage to the right valve flap 42.

[0067] The breakaway valve provided in this embodiment is assembled as independent valves on the left and right sides. The assembled valves are in a closed state. The connecting rod between the two valves is then positioned and tightened with an extended screw rod, and finally the breakaway bolt is tightened. When assembling a separate valve, the valve disc and the elastic member are first installed in the flow cavity of the valve body, and then the support frame is installed. The support frame and the valve body are fastened by threads.

[0068] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A breakaway valve, characterized in that: include: A left valve body (1) having a left flow chamber therein; A right valve body (2) having a right flow chamber therein; A left sealing device (3) and a right sealing device (4), wherein the left sealing device (3) is arranged in the left flow chamber, and the right sealing device (4) is arranged in the right flow chamber; A driving member (5) connected to the right sealing device (4); Wherein, in the connected state, the right valve body (2) is connected to the left valve body (1), and the left sealing device (3) and the right sealing device (4) are in contact with each other, so that a gap is provided between the left sealing device (3) and the left flow chamber, and between the right sealing device (4) and the right flow chamber; In the pulled-off state, the left valve body (1) and the right valve body (2) move away from each other under the action of an external force, and the driving member (5) drives the right sealing device (4) to separate from the left sealing device (3), so that the left sealing device (3) and the right sealing device (4) respectively approach the left flow cavity and the right flow cavity under the action of an external force until they abut against each other; The left sealing device (3) comprises: A left support frame (31) is connected to the left flow chamber, and a space suitable for fluid flow is provided between the two; A left valve flap (32) is slidably connected to the left support frame (31); a left elastic member (33), wherein in the connected state, the left elastic member (33) has an elastic force driving the left valve flap (32) to move in the direction of the right sealing device (4); and in the pulled-off state, the left valve flap (32) moves in the direction of the right sealing device (4) under the action of the elastic force until it abuts against the left valve seat (34) in the left flow chamber; The right sealing device (4) comprises: A right support frame (41) is connected to the right flow chamber, and a space suitable for fluid flow is provided between the two; A right valve flap (42) is slidably connected to the right support frame (41); a right elastic member (43), wherein in the connected state, the right elastic member (43) has an elastic force driving the right valve flap (42) to move in the direction of the left valve flap (32); and in the pulled-off state, the right valve flap (42) moves in the direction of the left valve flap (32) under the action of the elastic force until it abuts against the right valve seat (44) in the right flow chamber; The left sealing device (3) further comprises a left connecting rod (35), wherein the left connecting rod (35) is connected to the left valve flap (32); The right sealing device (4) further comprises a right connecting rod (45), wherein the right connecting rod (45) is connected to the right valve flap (42); In the connected state, the left connecting rod (35) abuts against the right connecting rod (45) to squeeze the left elastic member (33) and the right elastic member (43), so that the left valve flap (32), the right valve flap (42) and the left valve seat (34), the right valve seat (44) are separated; In the pulled-off state, when the left valve body (1) and the right valve body (2) move away from each other under the action of an external force, the driving member (5) drives the left connecting rod (35) and the right connecting rod (45) to separate; The right sealing device (4) also includes A support seat (46) is fixedly connected to the right valve flap (42), and two through holes are provided on a side of the support seat (46) away from the right support frame (41); A pin shaft (47) passes through two through holes of the support seat (46) and is fixedly connected thereto, and an end of the right connecting rod (45) is movably connected to the surface of the pin shaft (47); In the pulled-off state, the driving member (5) drives the right connecting rod (45) to rotate around the axis of the pin shaft (47) so that the left connecting rod (35) is separated from the right connecting rod (45).

2. The breakaway valve according to claim 1, characterized in that: The driving member (5) is a torsion spring.

3. The breakaway valve according to claim 1, characterized in that: The left support frame (31) and the right support frame (41) are truncated cone-shaped, and the large end of the left support frame (31) and the large end of the right support frame (41) are arranged close to each other.

4. The breakaway valve according to claim 3, characterized in that: The left support frame (31) and the right support frame (41) are both provided with a through cavity inside, and the left valve flap (32) and the right valve flap (42) are arranged in the through cavity.

5. The breakaway valve according to claim 4, characterized in that: A sleeve ring is provided in the inner cavity of the left support frame (31) and the inner cavity of the right support frame (41); a left elastic member (33) is provided between the left valve flap (32) and the sleeve ring; and a right elastic member (43) is provided between the right valve flap (42) and the sleeve ring.

6. The breakaway valve according to any one of claims 1 to 5, characterized in that: A graphite gasket is provided at the connection between the left valve body (1) and the right valve body (2).

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