Safety valve backpressure striking device

Abstract

The utility model discloses a safety valve backpressure applying device which comprises a bearing table and a pressure applying device. A pressing assembly; the safety valve connecting flange is used for being connected to the outlet flange in a sealed mode, first assembly positions are arranged on the periphery of the safety valve connecting flange, and a second assembly position is arranged in the middle of the safety valve connecting flange. The first joint is arranged on the second assembly position; the pressing table connecting flange is used for being assembled and connected to the air inlet position of the pressing assembly, and a third assembling position is arranged in the middle of the pressing table connecting flange. The second joint is arranged on the third assembly position; the plastic hose is connected between the first connector and the second connector, and an outlet of the safety valve is connected to an air inlet of the pressing assembly through the first connector, the plastic hose and the second connector. According to the safety valve backpressure hitting device, the problem that the reliability of a valve is affected by inversion of the valve is solved; the structure is reasonable, operation is easy, safety valve detection quality is further improved, and equipment reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valve back pressure application, in particular to a safety valve back pressure application device. Background Art

[0002] In the prior art, some safety valves currently used in nuclear power plants require back pressure verification during offline pressure verification.

[0003] In the past, there were no special tools for the back pressure test of safety valves. The method was to invert the safety valve and connect it to the pressure test platform for pressure test. This method may cause the internal components of the safety valve to be misaligned because the position of the safety valve does not match the actual working conditions of the safety valve. On the other hand, there is also a certain calibration deviation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a safety valve back pressure device to solve the problem of the influence of valve inversion on valve reliability when back pressure is applied; the structure is reasonable and easy to operate, which further improves the detection quality of the safety valve and improves the reliability of the equipment.

[0005] In order to solve the above technical problems, an embodiment of the utility model provides a safety valve back pressure device, the outlet of the safety valve is connected with an outlet flange, including: a supporting platform for supporting the safety valve; a pressure component for applying back pressure to the safety valve; a safety valve connecting flange for sealingly connecting to the outlet flange, a plurality of first assembly positions for connecting the outlet flange are arranged around the safety valve connecting flange, a second assembly position is arranged in the middle of the safety valve connecting flange; a first joint installed on the second assembly position; a pressure platform connecting flange for assembling and connecting to the air inlet position of the pressure component, a third assembly position is arranged in the middle of the pressure platform connecting flange; a second joint installed on the third assembly position; and a plastic hose respectively connected between the first joint and the second joint, wherein: the safety valve outlet is connected to the air inlet of the pressure component through the first joint, the plastic hose and the second joint.

[0006] The first joint and the second joint are joint structures with air inlets and outlets at both ends and air inlet and outlet channels in the middle.

[0007] The first joint includes: a joint body, a sealing connection section connected to one side of the joint body and a fish scale joint section connected to the other side of the joint body, wherein: the sealing connection section is connected to the second assembly position or the third assembly position; the fish scale joint section is sealingly connected to the plastic hose.

[0008] The first joint and the second joint have the same structure.

[0009] Wherein, a gasket is installed between the pressing platform connecting flange and the pressing platform assembly.

[0010] Wherein, a gasket is installed between the outlet flange and the safety valve connecting flange.

[0011] The plastic hose is a non-bending hose structure.

[0012] Wherein, a protective plate is arranged between the surface of the bearing platform and the safety valve.

[0013] The safety valve back-pressure device provided by the utility model has the following beneficial effects: the safety valve back-pressure device comprises: a bearing platform; a pressure component; a safety valve connecting flange for sealingly connecting to the outlet flange, a first assembly position is arranged around the safety valve connecting flange, and a second assembly position is arranged in the middle of the safety valve connecting flange; a first joint installed on the second assembly position; a pressure platform connecting flange for assembling and connecting to the air inlet position of the pressure component, a third assembly position is arranged in the middle of the pressure platform connecting flange; a second joint installed on the third assembly position; and a plastic hose respectively connected between the first joint and the second joint, wherein: the safety valve outlet is connected to the air inlet of the pressure component through the first joint, the plastic hose and the second joint, and the valve can be back-pressured without inverting the valve, thereby solving the problem of the inversion of the valve affecting the reliability of the valve during back-pressure; the structure is reasonable and easy to operate, further improving the detection quality of the safety valve and the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the back pressure device of the safety valve in this embodiment.

[0016] Figure 2 It is a schematic structural diagram of the first joint of the back pressure device of the safety valve in this embodiment. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Figure 1-Figure 2 The figure shows the first embodiment of the back pressure device for the safety valve of the utility model.

[0019] The safety valve back pressure device in this embodiment has an outlet flange 31 connected to the outlet of the safety valve 3, including: a supporting platform 1 for supporting the safety valve; a pressure component 2 for applying back pressure to the safety valve; a safety valve connecting flange 4 for sealingly connecting to the outlet flange 31, a plurality of first assembly positions 41 for connecting to the outlet flange 31 are arranged around the safety valve connecting flange 4, and a second assembly position 42 is arranged in the middle of the safety valve connecting flange 4; a first connector 5 installed on the second assembly position 42; a pressure platform connecting flange 6 for assembling and connecting to the air inlet position of the pressure component 2, and a third assembly position 61 is arranged in the middle of the pressure platform connecting flange 6; a second connector 7 installed on the third assembly position 61; and a plastic hose 8 respectively connected between the first connector 5 and the second connector 7, wherein: the safety valve outlet is connected to the air inlet of the pressure component 2 through the first connector 5, the plastic hose 8 and the second connector 7.

[0020] In specific implementation, the support platform 1 and the pressure assembly 2 are box-shaped structures, each with an operating table on the top for easy maintenance. A protective plate 11 is installed on the surface of the support platform 1 to protect the safety valve, for example, to keep it in actual working state.

[0021] The function of the safety valve connection flange 4 is to assemble with the outlet flange 31 which is sealed and connected to the outlet of the safety valve 3. A plurality of first assembly positions 41 for connecting with the outlet flange 31 are arranged around the safety valve connection flange 4, and a second assembly position 42 is arranged in the middle of the safety valve connection flange 4. Among them, the first assembly position 41 is a plurality of screw holes with the same structure which are evenly and equidistantly opened on the safety valve connection flange 4. The second assembly position 42 is an assembly hole for sealing and assembling with the first joint 5.

[0022] Preferably, a gasket is installed between the outlet flange 31 and the safety valve connecting flange 4 to enhance the sealing performance. In addition, the safety valve connecting flange 4 can also be manufactured in various specifications according to on-site requirements, and the matching specifications are selected to be connected to the safety valve outlet to enhance the adaptability.

[0023] Furthermore, the first joint 5 is a joint structure with air inlets and outlets at both ends and an air inlet and outlet channel in the middle. In this embodiment, the first joint 5 includes: a joint body 51, a sealing connection section 52 connected to one side of the joint body 51, and a fish scale joint section 53 connected to the other side of the joint body 51.

[0024] Furthermore, the structure of the second joint 7 is the same as that of the first joint 5 , the sealing connection section 52 of the first joint 5 is connected to the first assembly position 41 of the safety valve connecting flange 4 , and the sealing connection section of the second joint 7 is connected to the third assembly position 61 of the pressing platform connecting flange 6 .

[0025] Furthermore, the function of the pressing platform connecting flange 6 is to be assembled and connected to the air inlet position of the pressing component 2, and the third assembly position 61 of the pressing platform connecting flange 6 is an assembly hole for sealing assembly with the second joint 7.

[0026] Preferably, a gasket is installed between the pressing platform connecting flange 6 and the pressing platform assembly 2. In this way, the sealing performance is enhanced. During specific implementation, the pressing platform connecting flange 6 and the pressing platform assembly 2 can also be clamped with a three-claw clamp.

[0027] Furthermore, the plastic hose 8 is respectively connected between the fish scale joint section 53 of the first joint 5 and the fish scale joint section of the second joint 7 .

[0028] Preferably, the plastic hose 8 is a non-bend hose structure. During implementation, the plastic hose 8 is checked with a leak detection liquid to ensure that there are no leaks at each connection, thereby performing a reliable pressure holding test.

[0029] In the specific implementation of the safety valve back pressure device in this embodiment, firstly, the pressure platform connection flange 6 connected with the second joint 7 is assembled at the position of the air inlet of the pressure assembly 2, and then the safety valve connection flange 4 connected with the first joint 5 is assembled on the outlet flange 31 of the safety valve 3. Then, the opposite ends of the plastic hose 8 are respectively connected between the fish scale joint section of the first joint 5 and the fish scale joint section of the second joint 7. During this period, ensure that the plastic hose 8 has no bends, and use a leak detection liquid to check that there are no leaks at each connection, and then perform a pressure holding test according to the safety valve back pressure requirement.

[0030] The implementation of the safety valve back pressure device in the utility model has the following beneficial effects:

[0031] First, the outlet of the safety valve is connected to the air inlet of the pressure component through the first joint, the plastic hose and the second joint. The valve can be back-pressured without inverting the valve, solving the problem of the influence of the inverted valve on the valve reliability. The structure is reasonable and easy to operate, which further improves the detection quality of the safety valve and the reliability of the equipment.

[0032] Second, the connection method is simple, the operation is convenient, the replacement is simple, and the risk of personal injury is reduced.

Claims

1. A safety valve back pressure device, the outlet of the safety valve is connected with an outlet flange, characterized in that: include: A bearing platform for bearing the safety valve; A pressure-applying component used to apply back pressure to the safety valve; A safety valve connecting flange for sealingly connecting to the outlet flange, wherein a plurality of first assembly positions for connecting to the outlet flange are arranged around the safety valve connecting flange, and a second assembly position is arranged in the middle of the safety valve connecting flange; a first connector mounted on the second assembly position; A pressing platform connecting flange used for assembling and connecting to the air inlet position of the pressing assembly, wherein a third assembly position is provided in the middle of the pressing platform connecting flange; A second connector mounted on the third assembly position; as well as A plastic hose is respectively connected between the first connector and the second connector, wherein the safety valve outlet is connected to the air inlet of the pressure component through the first connector, the plastic hose and the second connector.

2. The safety valve back pressure device according to claim 1, characterized in that: The first joint and the second joint are joint structures with air inlet and outlet ports at both ends and air inlet and outlet channels in the middle.

3. The safety valve back pressure device according to claim 2, characterized in that: The first joint comprises: a joint body, a sealing connection section connected to one side of the joint body, and a fish scale joint section connected to the other side of the joint body, wherein: The sealing connection section is connected to the second assembly position or the third assembly position; The fish scale joint section is sealed and connected to the plastic hose.

4. The safety valve back pressure device according to claim 3, characterized in that: The first connector and the second connector have the same structure.

5. The safety valve back pressure device according to claim 1, characterized in that: A gasket is arranged between the pressing platform connecting flange and the pressing platform assembly.

6. The safety valve back pressure device according to claim 1, characterized in that: A gasket is arranged between the outlet flange and the safety valve connecting flange.

7. The safety valve back pressure device according to claim 1, characterized in that: The plastic hose is a non-bending hose structure.

8. The safety valve back pressure device according to claim 1, characterized in that: A protective plate is provided between the surface of the bearing platform and the safety valve.

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