Nuclear engineering hydraulic valve test bed

Abstract

The utility model provides a nuclear engineering hydraulic valve test bench, which relates to the technical field of valve test and comprises a pedestal, a test cylinder is fixedly arranged on the pedestal, two ends of the test cylinder are respectively provided with a valve pipe and a booster pump group in a penetrating manner, and a test bin is connected between the valve pipe and the booster pump group; a valve pipe opening is formed in the valve pipe in a penetrating mode, a sealing ring is arranged at the end of the valve pipe opening in a surrounding mode, a plurality of clamping seats are annularly arranged on the sealing ring, and buckling clamping heads are arranged on the clamping seats in a sliding fit mode. A flange frame is adjacently arranged at the outer end of the valve pipe; the beneficial effects of the utility model lie in that in consideration of the test requirements of the nuclear engineering hydraulic valve, the flange plate frames arranged inside and outside and the sealing ring and the clamping seat clamping structure in the valve pipe orifice are adopted to meet the butt joint airtightness requirements of the valve body and the valve orifice under the process of a plurality of pressure output tests; and in cooperation with the reserved test bin, the safety of conversion between the booster pump set and the test valve body is ensured, and the practicability of the test bench is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve testing, and particularly relates to a nuclear engineering hydraulic valve testing platform. Background Art

[0002] The hydraulic valve test bench is suitable for the pressure performance test of the sealing and valve body strength of straight-through flange connection type valves, mainly to ensure the reliable sealing quality of newly produced valves and valves after inspection and maintenance. The test bench can perform shell test, upper sealing test, and high-pressure water sealing test on the valve. During the test process, it is convenient to visually check whether the test workpiece has leakage;

[0003] Nuclear engineering hydraulic valves are widely used. Considering the particularity of hydraulic valves in the nuclear island system pipelines, the valve pipelines themselves have high compressive load strength, and the valve body is greatly affected by the pressure change of the pipeline system medium in the pipeline. When conducting sealing tests on hydraulic valves, traditional hydraulic valve test benches frequently change the pressure output test method, which has a great impact on the installation and docking structure of the valve body, which is not conducive to subsequent high-intensity tests. Utility Model Content

[0004] In view of the above technical problems existing in the prior art, a nuclear engineering hydraulic valve test bench is provided.

[0005] The purpose and effect of the utility model are achieved by the following specific technical means:

[0006] A nuclear engineering hydraulic valve test bench comprises a bench seat, on which a test cylinder is fixedly arranged, two ends of the test cylinder are respectively penetrated by a valve pipe and a booster pump group, and a test chamber is connected between the valve pipe and the booster pump group;

[0007] A valve pipe opening is formed through the valve pipe, and a sealing ring is arranged around the end of the valve pipe opening. A plurality of clamp seats are arranged in an annular manner on the sealing ring, and a buckle clamp is slidably matched on the clamp seat.

[0008] A flange frame is arranged adjacent to the outer end of the valve tube, and a plurality of pneumatic shafts are passed through the flange frame and the test tube, and the pneumatic shafts are connected to the external switching valve tube and the air pump in turn.

[0009] Furthermore, the upper cover of the pedestal is provided with an outer isolation cover, and the clamping position between the outer isolation cover and the pedestal is sealed by colloid.

[0010] Furthermore, the test chamber is a single-way valve chamber structure, and a pressure relief valve pipe is externally connected to the test chamber.

[0011] Furthermore, the valve pipe opening is a bucket-shaped clamping structure, and the valve pipe opening and the surface of the flange frame are both provided with matching stepped sockets.

[0012] Furthermore, the buckle clamp is an L-shaped fastener, and the buckle clamp is a pneumatic buckling structure, and the outer side of the buckle clamp is connected to the bronchus.

[0013] Furthermore, the sealing ring is a conical surface interlocking structure.

[0014] Furthermore, a pipe ring is provided between the pneumatic shaft and the transfer valve tube, and the multiple pneumatic shafts are interconnected through the pipe ring.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] This nuclear engineering hydraulic valve test bench takes into account the testing needs of nuclear engineering hydraulic valves. It adopts the internal and external flange racks and the sealing ring and clamping seat clamping structure of the valve pipe mouth to meet the air tightness requirements of the valve body and valve mouth under multiple pressure output test processes. The reserved test chamber is used to ensure the safety of the conversion between the booster pump group and the test valve body, thereby improving the practicality of the test bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal plane structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the plane structure of the valve pipe mouth of the utility model.

[0020] Markings in the figure: 1-base; 2-external isolation cover; 3-test cylinder; 4-air pump; 5-flange rack; 6-valve pipe; 7-pneumatic shaft; 8-adapter valve pipe; 9-pipe ring; 10-valve pipe mouth; 11-sealing ring; 12-test chamber; 13-boosting pump group; 14-bronchial tube; 15-clamp seat; 16-clamp head. DETAILED DESCRIPTION

[0021] See also Figure 1-3 , the embodiments of the utility model are further described;

[0022] A nuclear engineering hydraulic valve test bench comprises a bench seat 1, on which a test cylinder 3 is fixedly arranged, at both ends of which a valve pipe 6 and a booster pump group 13 are respectively provided, and a test chamber 12 is connected between the valve pipe 6 and the booster pump group 13;

[0023] A valve pipe opening 10 is formed through the valve pipe 6, and a sealing ring 11 is arranged around the end of the valve pipe opening 10. A plurality of clamp seats 15 are arranged in an annular manner on the sealing ring 11, and a buckle clamp 16 is slidably fitted on the clamp seat 15.

[0024] A flange frame 5 is disposed adjacent to the outer end of the valve tube 6 , and a plurality of pneumatic shafts 7 are passed between the flange frame 5 and the test tube 3 , and the pneumatic shafts 7 are connected to the external switching valve tubes 8 and the air pump 4 in turn.

[0025] The test bench uses a flange frame 5 as a fixing structure for the test cylinder 3 and the valve body to be tested. The fixing method is based on flange installation to fix the valve body to be tested and the flange frame 5. In the subsequent test process, the air pump 4 is used to feed the pneumatic shaft 7 along the transfer valve pipe 8, and the axial sliding and extension of the pneumatic shaft 7 is used to connect the valve body to the valve pipe port 11 in the valve pipe 6, so that the valve body is connected to the valve pipe port 11. During the test, based on the hydraulic valve test method, the hydraulic pressure provided by the booster pump group 13 acts on the valve body, and the sealing and valve body strength of the valve body are tested in combination with the observation equipment;

[0026] Compared with the traditional hydraulic valve test bench, this test bench takes into account the special requirements of nuclear engineering hydraulic valves in application scenarios. By transferring the test chamber 12 between the valve body valve pipe port 10 and the booster pump group 13, a buffer zone space is provided for the feed hydraulic pressure of the hydraulic valve test. During the test, the volume of the test chamber 12 is calculated as the surplus hydraulic pressure supplied by the booster pump group 13 to provide a buffer space for the subsequent multiple pressure changes of the booster pump group 13, so as to ensure the stable progress of the test.

[0027] At the same time, compared with the traditional test bench clamping and sealing means, the test bench combines the sealing ring 11 and the clamping seat 15 to perform inward and outward clamping and sealing on the butt end of the valve body and the valve pipe mouth 11, which can effectively maintain the sealing stability under the vibration of the pressure conversion valve body, thereby improving the practicality of the test bench.

[0028] Preferably, the upper cover of the pedestal 1 is provided with an outer isolation cover 2, and the clamping point between the outer isolation cover 2 and the pedestal 1 is sealed by colloid. The test bench further seals its hydraulic test space externally by means of the additional outer isolation cover 2 to further improve the sealing performance of the test bench.

[0029] Preferably, the test chamber 12 is a one-way valve cavity structure, and the test chamber 12 is externally connected to a pressure relief valve pipe. The one-way valve cavity structure is used to prevent the successive pressures of the booster pump group 13 from acting on the feed port of the booster pump group 13 when the pressure is changed multiple times, so as to ensure the safety of the connecting structure between the test chamber 12 and the booster pump group 13. At the same time, a pressure relief valve pipe is equipped to facilitate the test personnel to perform manual pressure relief.

[0030] Preferably, the valve pipe mouth 10 is a bucket-mouth-shaped clamping structure, and the valve pipe mouth 10 and the flange frame 5 are both provided with matching step surface sockets. The bucket-mouth-shaped docking structure provides support for the valve pipe mouth 10 to dock with valve bodies of different calibers, and the formed step surface socket can facilitate the fitting and fixation of the sealing ring 11 and the clamping activity of the clamp seat 15.

[0031] Preferably, the chuck 16 is an L-shaped fastener, and the chuck 16 is a pneumatic fastening structure. The bronchus 14 is connected to the outside of the chuck 16. The chuck 16 is driven by pneumatic fastening to facilitate the use of pneumatic instantaneous pressure changes to maintain the clamping stability of the chuck 16 during multiple pressure changes during the test.

[0032] Preferably, the sealing ring 11 is a conical surface interlocking structure. The conical surface interlocking structure can change the depth of the conical surface interlocking when the sealing ring 11 is connected with the valve body valve port in the valve pipe port 10 and the clamping pressure of the snap-fit ​​head 16 changes, so as to adapt to the clamping pressure under different degrees and cooperate with the snap-fit ​​head 16 to complete the change of clamping pressure.

[0033] Preferably, a pipe ring 9 is provided between the pneumatic shaft 7 and the transfer valve tube 8, and multiple pneumatic shafts 7 are interconnected through the pipe ring 9. The pneumatic shafts 7 are combined in series by the pipe ring 9 to ensure the consistency of the clamping activity of the pneumatic shaft 7 under the pressure feed of the same air pump 4, so as to ensure the axial stability of the flange frame 5 with respect to the valve tube 6 at various angles.

[0034] The implementation method of the device is:

[0035] During the test, the test bench is based on the hydraulic valve test principle. The flange structure is used to complete the docking and fixing of the flange of the valve body to be tested and the flange frame 5 by clamping and fixing. The air pump 4 is used to pneumatically control the pneumatic shaft 7 to slide and retract axially along the transfer valve tube 8 and the tube ring 9, so as to axially move the flange frame 5 and the valve body to be tested into the valve tube 6, and the valve body valve is docked and inserted into the valve pipe port 10 in the valve tube 6. During the insertion process, the valve body valve is clamped and fixed with the sealing ring 11 as it goes deeper. At the same time, the air supply is controlled by the pneumatic feed bronchus 14, and the air pressure acts on the buckle clamp 16 on the clamp seat 15, so that the buckle clamp 16 completes the clamping and fixing with the valve body valve.

[0036] During the test, the pressure output of the booster pump group 13 is controlled to provide hydraulic pressure to the test chamber 12, and the test tool is used to perform air tightness test and pressure strength test on the valve body to be tested.

[0037] Finally, 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 purpose 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 nuclear engineering hydraulic valve test bench, comprising a bench seat (1), characterized in that: A test cylinder (3) is fixedly arranged on the pedestal (1), and a valve pipe (6) and a booster pump group (13) are respectively provided at both ends of the test cylinder (3), and a test chamber (12) is connected between the valve pipe (6) and the booster pump group (13); A valve pipe opening (10) is formed through the valve pipe (6), and a sealing ring (11) is arranged around the end of the valve pipe opening (10), a plurality of clamping seats (15) are arranged in an annular shape on the sealing ring (11), and a buckle clamp (16) is slidably fitted on the clamping seat (15); A flange frame (5) is disposed adjacent to the outer end of the valve tube (6), and a plurality of pneumatic shafts (7) are inserted between the flange frame (5) and the test cylinder (3). The pneumatic shafts (7) are connected to the external switching valve tube (8) and the air pump (4) in turn.

2. A nuclear engineering hydraulic valve test bench according to claim 1, characterized in that: The upper cover of the pedestal (1) is provided with an outer isolation cover (2), and the clamping position between the outer isolation cover (2) and the pedestal (1) is subjected to a colloid-enclosed sealing treatment.

3. A nuclear engineering hydraulic valve test bench according to claim 1, characterized in that: The test chamber (12) is a one-way valve chamber structure, and the test chamber (12) is externally connected to a pressure relief valve pipe.

4. A nuclear engineering hydraulic valve test bench according to claim 1, characterized in that: The valve pipe opening (10) is a bucket-shaped clamping structure, and the valve pipe opening (10) and the flange frame (5) are both provided with matching stepped sockets on their surfaces.

5. A nuclear engineering hydraulic valve test bench according to claim 1, characterized in that: The buckle clamp (16) is an L-shaped buckle, and the buckle clamp (16) is a pneumatic buckling structure, and the outer side of the buckle clamp (16) is connected to the bronchus (14).

6. A nuclear engineering hydraulic valve test bench according to claim 1, characterized in that: The sealing ring (11) is a conical surface embedded structure.

7. A nuclear engineering hydraulic valve test bench according to claim 1, characterized in that: A pipe ring (9) is provided between the pneumatic shaft (7) and the switching valve tube (8), and the plurality of pneumatic shafts (7) are interconnected via the pipe ring (9).

Images