Valve clack assembly structure for safety valve

Abstract

The utility model relates to the technical field of safety valves, and provides a valve clack assembly structure for a safety valve, which comprises a valve clack body arranged in a safety valve body in a sliding manner and a valve rod used for driving the valve clack body to plug or unplug the safety valve body, the valve clack body is provided with an outer ring and an inner ring, and a mounting groove is formed between the outer ring and the inner ring; the sealing ring is sleeved with the mounting groove in a sealing mode and provided with a through hole and an inner cavity, the inner cavity is communicated with the through hole, and the axis of the inner cavity is perpendicular to the axis of the through hole; the first moving head is arranged in the inner cavity in a sliding mode, and the first moving head is used for abutting against the inner ring after sliding. By means of the technical scheme, the problem that in the prior art, a sealing ring on a valve clack is prone to falling off is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, and in particular to a valve flap assembly structure for a safety valve. Background Art

[0002] Safety valve, also known as safety relief valve or insurance valve, is an important automatic valve device designed to protect pressure vessels, pipelines, boilers, systems and other pressure equipment from excessive pressure. When the internal pressure of the system exceeds the preset point (i.e. the opening pressure setting value of the safety valve), the safety valve will automatically open and discharge part of the medium (such as gas or liquid) to a safe place to reduce the system pressure to a safe level, and then automatically close to prevent the medium from continuing to leak. The valve disc of the safety valve is used to block or unblock the safety valve. A sealing ring is usually set on the valve disc. When too much medium is passed into the safety valve, the pressure in the safety valve increases, which will lift the valve disc and make the valve disc unblock the safety valve. In the above process, the sealing ring set on the valve disc is easy to fall off during the rising process of the valve disc. Utility Model Content

[0003] The utility model provides a valve flap assembly structure for a safety valve, which solves the problem that a sealing ring on the valve flap in the related art is easy to fall off.

[0004] The technical solution of the utility model is as follows:

[0005] A valve flap assembly structure for a safety valve comprises a valve flap body slidably arranged in a safety body and a valve stem for driving the valve flap body to block or cancel blocking of the safety valve body; the valve flap body comprises an outer ring and an inner ring, and a mounting groove is formed between the outer ring and the inner ring;

[0006] A sealing ring, a sealing sleeve is arranged in the installation groove, the sealing ring has a through hole and an inner cavity, the inner cavity is connected with the through hole, and the axis of the inner cavity is perpendicular to the axis of the through hole;

[0007] The first moving head is slidably arranged in the inner cavity, and the first moving head is used to tighten the inner ring after sliding.

[0008] Optionally, it also includes:

[0009] A second moving head is slidably disposed in the inner cavity, and the second moving head abuts against the sealing ring after sliding;

[0010] An elastic component is located in the inner cavity, and the first moving head and the second moving head are connected through the elastic component.

[0011] Optionally, the elastic component includes:

[0012] A first moving block, arranged at an end of the first moving head away from the inner ring;

[0013] A second moving block is arranged at an end of the second moving head close to the first moving head;

[0014] An elastic member, with two ends respectively arranged on the first moving block and the second moving block, and the elastic member is used to provide a force for the first moving block to move away from the second moving block.

[0015] Optionally, it also includes:

[0016] The second moving head is slidably arranged in the inner cavity. The second moving head is arranged at an end of the first moving head away from the inner ring. After the first moving head slides, it drives the second moving head to slide. After the second moving head slides, it abuts against the sealing ring.

[0017] Optionally, the first moving head and the second moving head are integrally formed.

[0018] Optionally, there are a plurality of inner cavities, which are circumferentially distributed in the sealing ring along the inner ring axis, and are respectively connected to the through holes, and there are a plurality of the first moving head, the second moving head, and the elastic component.

[0019] Optionally, the sealing ring further has an annular groove, which is arranged on the outer wall of the sealing ring, and further comprises:

[0020] A convex ring is sleeved in the annular groove, the convex ring has a convex portion, and the convex ring is coaxial with the inner cavity.

[0021] The working principle and beneficial effects of the utility model are:

[0022] In the utility model, during installation, the operator needs to align the sealing ring with the installation groove, and then use an adapted tool to press down the sealing ring. During the pressing process, the top of the first moving head contacts the outer wall of the inner ring. As the sealing ring is pressed down, the first moving head slides to the left, and the left side of the first moving head pushes the sealing ring toward the outer ring, so that the outer wall of the sealing ring and the inner wall of the inner ring are pressed tightly. The top of the first moving head and the outer wall of the inner ring are pressed tightly, so that the sealing ring and the installation groove are closely matched. The setting of the first moving head forms a close contact between the sealing ring and the installation groove, reducing the possibility of the sealing ring being washed away from the installation groove by the high-pressure medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0024] Figure 1It is a schematic cross-sectional view of the sealing ring, the valve disc body and the first moving head when they are assembled in the utility model;

[0025] Figure 2 It is a schematic cross-sectional view of the valve body and valve stem of the utility model when they are assembled;

[0026] Figure 3 It is a cross-sectional structural schematic diagram of the sealing ring and the first moving head when assembled in the utility model;

[0027] Figure 4 It is a cross-sectional structural diagram of the sealing ring, the first moving head, the second moving head, the elastic component and the valve disc body when they are assembled in the utility model;

[0028] Figure 5 for Figure 4 A schematic diagram of the local enlarged structure at position I in the middle;

[0029] Figure 6 It is a cross-sectional structural schematic diagram of the first moving head, the second moving head, the sealing ring and the valve disc body when they are assembled in the utility model;

[0030] Figure 7 It is a schematic cross-sectional view of the assembly of the sealing ring, the first moving head, the second moving head, the elastic component, the convex ring and the valve disc body in the utility model;

[0031] Figure 8 for Figure 7 Schematic diagram of the local enlarged structure at II in the middle.

[0032] In the figure: 1. valve disc body; 101. outer ring; 102. inner ring; 103. mounting groove; 2. valve stem; 3. sealing ring; 301. through hole; 302. inner cavity; 303. annular groove; 5. first moving head; 6. second moving head; 7. elastic component; 701. first moving block; 702. second moving block; 703. elastic member; 8. convex ring; 801. raised portion. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0034] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0035] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] Example 1

[0038] Reference Figure 1~Figure 3 , which is the first embodiment of the utility model, proposes a valve flap assembly structure for a safety valve, including: a valve flap body 1 slidably arranged in the safety valve body and a valve stem 2 used to drive the valve flap body 1 to block or cancel the blocking of the safety valve body, the valve flap body 1 has an outer ring 101 and an inner ring 102, and a mounting groove 103 is formed between the outer ring 101 and the inner ring 102; the sealing sleeve of the sealing ring 3 is arranged in the mounting groove 103, the sealing ring 3 has a through hole 301 and an inner cavity 302, the inner cavity 302 is connected with the through hole 301, and the axis of the inner cavity 302 is perpendicular to the axis of the through hole 301; the first moving head 5 is slidably arranged in the inner cavity 302, and the first moving head 5 is used to tighten the inner ring 102 after sliding.

[0039] In this embodiment, the valve disc body 1 is slidably mounted in the safety valve body. The valve disc body 1 is in direct contact with the fluid and is responsible for controlling the opening and closing of the safety valve body. The valve stem 2 is used to drive the valve disc to block or cancel the blocking of the safety valve body. The sealing ring 3 is set in the installation groove 103. When the safety valve is opened, the sealing ring 3 plays a sealing role to reduce the outflow of the medium in the safety valve from the connecting part of the valve stem 2 and the safety valve body. During installation, the operator needs to align the sealing ring 3 with the installation groove 103, and then use an appropriate tool to press down the sealing ring 3. During the pressing process, the top of the first moving head 5 contacts the outer wall of the inner ring 102. As the sealing ring 3 is pressed down, the first moving head 5 slides to the left, and the left side of the first moving head 5 pushes the sealing ring 3 against the outer ring 101, so that the outer wall of the sealing ring 3 and the inner wall of the inner ring 102 are pressed tightly. The top of the first moving head 5 and the outer wall of the inner ring 102 are pressed tightly, so that the sealing ring 3 and the installation groove 103 are tightly matched. The setting of the first moving head 5 forms a close contact between the sealing ring 3 and the installation groove 103, reducing the possibility of the sealing ring 3 being washed away from the installation groove 103 by the high-pressure medium.

[0040] Example 2

[0041] Reference Figure 1 , Figure 4 and Figure 5 This embodiment is different from the first embodiment in that it further includes: a second moving head 6 is slidably arranged in the inner cavity 302, and the second moving head 6 abuts against the sealing ring 3 after sliding; the elastic component 7 is located in the inner cavity 302, and the first moving head 5 and the second moving head 6 are connected through the elastic component 7, and the elastic component 7 includes: a first moving block 701 is arranged at an end of the first moving head 5 away from the inner ring 102; the second moving block 702 is arranged at an end of the second moving head 6 close to the first moving head 5; both ends of the elastic member 703 are respectively arranged on the first moving block 701 and the second moving block 702, and the elastic member 703 is used to provide a force for the first moving block 701 to move away from the second moving block 702.

[0042] In this embodiment, a second moving head 6 and an elastic component 7 are added on the basis of the first embodiment. During installation, the operator needs to align the sealing ring 3 with the installation groove 103, and then use an adapted tool to press down the sealing ring 3. During the pressing process, the first moving head 5 contacts the outer wall of the inner ring 102, and the first moving head 5 slides to the left, driving the first moving block 701 to slide to the left. At this time, the elastic member 703 is deformed by the pressure to the left, causing the second moving head 6 to slide to the left, so that the second moving head 6 presses the sealing ring 3 against the inner wall of the outer ring 101. When the sealing ring 3 is installed in the installation groove 103, the top of the first moving head 5 presses against the outer wall of the inner ring 102, and the top of the second moving head 6 forms a close contact between the sealing ring 3 and the inner wall of the outer ring 101, reducing the possibility of the sealing ring 3 being washed away from the installation groove 103 by the high-pressure medium.

[0043] Example 3

[0044] Reference Figure 1 and Figure 6 This embodiment is different from the first embodiment in that it further includes: a second moving head 6 is slidably arranged in the inner cavity 302, and the second moving head 6 is arranged at an end of the first moving head 5 away from the inner ring 102. After the first moving head 5 slides, it drives the second moving head 6 to slide, and the second moving head 6 abuts against the sealing ring 3 after sliding.

[0045] In this embodiment, the second moving head 6 is slidably disposed in the inner cavity 302, and the second moving head 6 is disposed at one end of the first moving head 5 away from the inner ring 102. It should be noted that the protrusion of the second moving head 6 is opposite to the protrusion of the first moving head 5. When the first moving head 5 contacts the inner ring 102, the first moving head 5 slides to the left, driving the second moving head 6 to slide to the left, so that the first moving head 5 and the outer wall of the inner ring 102 are pressed tightly, and the second moving head 6 pushes the sealing ring 3 against the outer ring 101, so that the outer wall of the sealing ring 3 and the inner wall of the outer ring 101 form a close contact, so that the sealing ring 3 and the installation groove 103 are closely matched, reducing the possibility of the sealing ring 3 being washed away from the installation groove 103 by the high-pressure medium. In this embodiment, the first moving head 5 slides and then drives the second moving head 6 to slide, thereby realizing mechanical series connection, making the operation more integrated, and the control more smooth and synchronous.

[0046] Example 4

[0047] Reference Figure 1 and Figure 6 This embodiment is different from the third embodiment in that it further comprises: the first moving head 5 and the second moving head 6 are integrally formed.

[0048] In the present embodiment, the first moving head 5 and the second moving head 6 are no longer independent components, but are integrally formed. The integral forming of the first moving head 5 and the second moving head 6 simplifies the structure, reduces the assembly steps, and is convenient for processing. Since the first moving head 5 and the second moving head 6 are integrally formed, the synchronization between the first moving head 5 and the second moving head 6 is higher, and the probability of delay, misalignment, and displacement difference occurring is lower, making the operation control more accurate, and improving the tightness of the sealing ring 3 when being installed in the mounting groove 103.

[0049] Example 5

[0050] Reference Figure 7~Figure 8 This embodiment is different from the first, second and third embodiments in that it also includes: there are a plurality of inner cavities 302, the plurality of inner cavities 302 are circumferentially distributed in the sealing ring 3 along the axis of the inner ring 102, and the plurality of inner cavities 302 are respectively connected to the through holes 301, and there are a plurality of first moving heads 5, second moving heads 6 and elastic components 7.

[0051] In the present embodiment, there are multiple inner cavities 302, first moving heads 5, second moving heads 6 and elastic components 7, which means that when the sealing ring 3 is installed in the mounting groove 103, multiple points of support are formed between the sealing ring 3 and the inner ring 102, and multiple points of support are formed between the sealing ring 3 and the outer ring 101, so that the sealing ring 3 is more tightly installed in the mounting groove 103, reducing the possibility of the sealing ring 3 being rushed out of the mounting groove 103 by the high-pressure medium. When a first moving head 5 or a second moving head 6 or an elastic component 7 is damaged or fails, the sealing ring 3 and the mounting groove 103 still have a good tight fit.

[0052] Example 6

[0053] Reference Figure 7~Figure 8 This embodiment is different from the first, second and third embodiments in that it further includes: the sealing ring 3 also has an annular groove 303, and the annular groove 303 is arranged on the outer wall of the sealing ring 3; the convex ring 8 is sleeved in the annular groove 303, the convex ring 8 has a protrusion 801, and the convex ring 8 is coaxial with the inner cavity 302.

[0054] In this embodiment, the following conditions exist:

[0055] Case 1: When the sealing ring 3 is installed in the mounting groove 103, the top of the first moving head 5 presses against the outer wall of the inner ring 102, and the left side of the first moving head 5 pushes the convex ring 8 against the inner wall of the outer ring 101, so that the protrusion 801 and the inner wall of the outer ring 101 are pressed tightly, so that the sealing ring 3 fits tightly in the mounting groove 103.

[0056] Case 2: When the sealing ring 3 is installed in the mounting groove 103, the top of the first moving head 5 presses against the outer wall of the inner ring 102, and the top of the second moving head 6 pushes the convex ring 8 against the inner wall of the outer ring 101, so that the protrusion 801 and the inner wall of the outer ring 101 are pressed tightly, so that the sealing ring 3 fits tightly in the mounting groove 103.

[0057] It should be noted that the protrusion 801 should be a friction surface to increase the friction between the protrusion 801 and the inner wall of the outer ring 101 and reduce the possibility of the sealing ring 3 being separated from the installation groove 103.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A valve flap assembly structure for a safety valve, comprising a valve flap body (1) slidably arranged in a safety valve body and a valve stem (2) for driving the valve flap body (1) to block or cancel the blockage of the safety valve body, characterized in that: The valve flap body (1) comprises an outer ring (101) and an inner ring (102), wherein a mounting groove (103) is formed between the outer ring (101) and the inner ring (102), and further comprises: A sealing ring (3), wherein the sealing sleeve is arranged in the installation groove (103), the sealing ring (3) having a through hole (301) and an inner cavity (302), the inner cavity (302) being connected to the through hole (301), and the axis of the inner cavity (302) being perpendicular to the axis of the through hole (301); The first moving head (5) is slidably disposed in the inner cavity (302); the first moving head (5) is used to tighten the inner ring (102) after sliding.

2. The valve disc assembly structure for a safety valve according to claim 1, characterized in that: Also includes: A second movable head (6) is slidably disposed in the inner cavity (302), and the second movable head (6) abuts against the sealing ring (3) after sliding; An elastic component (7) is located in the inner cavity (302), and the first moving head (5) and the second moving head (6) are connected via the elastic component (7).

3. The valve disc assembly structure for a safety valve according to claim 2, characterized in that: The elastic component (7) comprises: A first moving block (701) is arranged at an end of the first moving head (5) away from the inner ring (102); A second moving block (702) is arranged at one end of the second moving head (6) close to the first moving head (5); An elastic member (703) has two ends respectively arranged on the first moving block (701) and the second moving block (702), and the elastic member (703) is used to provide a force for the first moving block (701) to move away from the second moving block (702).

4. The valve disc assembly structure for a safety valve according to claim 1, characterized in that: Also includes: The second moving head (6) is slidably arranged in the inner cavity (302). The second moving head (6) is arranged at an end of the first moving head (5) away from the inner ring (102). After the first moving head (5) slides, it drives the second moving head (6) to slide. After the second moving head (6) slides, it abuts against the sealing ring (3).

5. The valve disc assembly structure for a safety valve according to claim 4, characterized in that: The first moving head (5) and the second moving head (6) are integrally formed.

6. The valve disc assembly structure for a safety valve according to any one of claims 2 to 5, characterized in that: The sealing ring (3) further comprises an annular groove (303), wherein the annular groove (303) is arranged on the outer wall of the sealing ring (3), and further comprises: A convex ring (8) is sleeved in the annular groove (303), the convex ring (8) has a convex portion (801), and the convex ring (8) is coaxial with the inner cavity (302).

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