Sealing test device of spring safety valve

Abstract

The utility model relates to a sealing test device of a spring safety valve. The sealing test device for the spring type safety valve comprises a safety valve checking table, a clamping assembly, a water feeding pipe, a water outlet pipe, a water supply pump, a water pump inlet pipe and a water tank. A safety valve is mounted on the safety valve checking table, and the clamping assembly is fastened and clamped on an outlet flange of the safety valve; one end of the water feeding pipe and one end of the water outlet pipe respectively penetrate through the clamping assembly, and the end parts of the water feeding pipe and the water outlet pipe are respectively arranged in an outlet pipe of the safety valve; the other end of the water feeding pipe is connected with an outlet of the water supply pump; the other end of the water outlet pipe penetrates through the water tank; and the water supply pump is mounted on the water tank. The sealing test device of the spring safety valve has the advantage of high precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of safety valve, in particular to a sealing test device of a spring safety valve. BACKGROUND

[0002] The spring safety valve is a common type of safety valve, mainly used to protect pressure vessels, pipelines or equipment from overpressure damage. Its core working principle is to control the opening and closing of the valve through the balance of spring force and medium pressure. The spring safety valve refers to the sealing element such as valve clack or plunger being closed by the elastic pressure of spring. Once the high pressure generated by abnormal pressure of pressure vessel overcomes the spring pressure of safety valve, the closing device is opened, forming a pressure relief channel to discharge the high pressure. According to the opening height of valve clack, it is divided into full-lift type and micro-lift type. The full-lift type has large discharge capacity and good rebound force, and is suitable for liquid and gas media, and the micro-lift type is only suitable for liquid media.

[0003] The sealing performance test of spring safety valve is a key link to ensure its normal work and prevent medium leakage.

[0004] The static sealing test in the commonly used sealing performance test method is still the mainstream method due to its simplicity and low cost. The test principle is: in the closed state of the safety valve, a certain pressure (usually 90% of the set pressure) is applied, and the leakage between the valve clack and the valve seat is detected. Test medium: usually air, nitrogen or water. Leakage detection: for gas medium, bubble method (valve is immersed in water to observe bubbles) or flow meter is used to measure leakage. For liquid medium, the number of leakage drops is observed or flow meter is used to measure. Allowable leakage rate: according to the standard, the leakage rate is usually strictly limited, for example, API 527 stipulates that the gas leakage rate shall not exceed a certain value.

[0005] In this detection method of the prior art, since the gas cannot be completely blocked, the detection precision is not high by observing the bubbles. CONTENT OF THE UTILITY MODEL

[0006] Based on this, the purpose of the present application is to provide a sealing test device of a spring safety valve, which has the advantage of high detection precision.

[0007] In one aspect of the present application, a sealing test device of a spring safety valve is provided, which comprises a safety valve calibration table, a clamping assembly, an upper water pipe, a water outlet pipe, a water supply pump, a water pump inlet pipe and a water tank.

[0008] The safety valve is installed on the safety valve calibration table, and the clamping assembly is fastened and clamped on the outlet flange of the safety valve.

[0009] The upper water pipe and the outlet pipe are respectively penetrated by the clamping assembly, and the ends of the pipes are respectively arranged in the outlet pipe of the safety valve; the other end of the upper water pipe is connected with the outlet of the water supply pump; the other end of the outlet pipe is penetrated by the water tank;

[0010] The water supply pump is arranged on the water tank; one end of the water pump inlet pipe is connected with the inlet of the water supply pump, and the other end is penetrated by the water tank and arranged at the bottom of the inner cavity of the water tank;

[0011] The water supply pump is used for conveying the water in the water tank to the outlet pipe of the safety valve.

[0012] The sealing test device of the spring type safety valve can accurately understand the sealing performance of the safety valve by filling water into the outlet pipe of the safety valve, then placing the safety valve on the safety valve calibration table, and observing the air leakage of the valve disc of the safety valve, including observing the bubble condition, the corrugation condition, and listening to the sound, etc. Compared with the prior art, the scheme is more accurate and reliable.

[0013] Further, the clamping assembly comprises a baffle, a first clamping strip, a second clamping strip and a locking bolt;

[0014] The middle part of the baffle is circular, and the two sides thereof are square; and the end part of the square structure of the baffle is formed with an alignment hole;

[0015] The two ends of the first clamping strip are respectively formed with an assembly hole matched with the alignment hole;

[0016] The two ends of the second clamping strip are respectively formed with an assembly hole matched with the alignment hole;

[0017] The first clamping strip and the second clamping strip are arranged in parallel; the locking bolt is respectively penetrated by the alignment hole and the assembly hole, and is used for connecting and fastening the first clamping strip with the baffle, and connecting and fastening the second clamping strip with the baffle;

[0018] One end of the upper water pipe and one end of the outlet pipe are respectively penetrated by the middle part of the circular structure of the baffle.

[0019] Further, the clamping assembly further comprises a conical cover and a sealing rubber gasket, the conical cover is fixed in the middle part of the baffle, and a circular hole is arranged in the baffle and located in the conical cover;

[0020] The sealing rubber gasket is fixed on the circular structure of the baffle, and the sealing rubber gasket and the conical cover are respectively located on the two sides of the baffle;

[0021] One end of the upper water pipe penetrates the conical cover, one end of the water outlet pipe is connected with the end of the conical cover, and the water outlet pipe communicates with the inner cavity of the conical cover.

[0022] Further, a plurality of alignment holes are arranged on the two square structures of the baffle at equal intervals.

[0023] Further, an electric control valve is arranged on the water outlet pipe.

[0024] Further, a support seat and a matching column are further included.

[0025] Two support seats are respectively arranged on the upper surface of the water tank, and a plurality of matching grooves are arranged on the top surface of the support seat.

[0026] A plurality of matching columns are arranged on the side surface of the baffle which is located on the conical cover; one group of the matching columns is detachably assembled with the matching grooves on one support seat, and another group of the matching columns is detachably assembled with the matching grooves on another support seat.

[0027] Further, a filter assembly is further included; the filter assembly is placed in the water tank and connected with the other end of the water outlet pipe.

[0028] Further, the filter assembly includes a box body, a first filter layer, a second filter layer and a third filter layer.

[0029] The upper part of the box body is in the shape of an isosceles trapezoid in cross section, and the lower part of the box body is in the shape of a rectangle in cross section.

[0030] The upper part of the box body forms a cavity.

[0031] The first filter layer, the second filter layer and the third filter layer are respectively arranged in the lower part of the box body.

[0032] The other end of the water outlet pipe is connected with the upper part of the box body and communicates with the cavity of the box body.

[0033] A plurality of water-permeable holes are formed on the bottom surface of the box body.

[0034] Further, the filter assembly further includes a grid and a sponge layer.

[0035] The grid is horizontally arranged in the water tank, and the grid is arranged below the box body.

[0036] The sponge layer is arranged on the grid.

[0037] The other end of the water pump inlet pipe is arranged below the grid.

[0038] Further, the two ends of the first clamping strip are respectively formed with a circular expansion part; the two ends of the second clamping strip are respectively formed with a circular expansion part.

[0039] The assembly hole is located in the expansion part.

[0040] Further, the surfaces of the first clamping strip and the second clamping strip are respectively formed with a reinforcing rib along the length direction thereof.

[0041] For better understanding and implementation, the application is described in detail below in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 Fig. 1 is a perspective view of a sealing test device for a spring safety valve according to the present application;

[0043] Figure 2 Fig. 2 is a perspective view of a sealing test device for a spring safety valve according to the present application (with a safety valve outlet pipe clamped thereon);

[0044] Figure 3 Fig. 3 is another perspective view of a sealing test device for a spring safety valve according to the present application (with a safety valve outlet pipe clamped thereon);

[0045] Figure 4 Fig. 4 is a perspective view of a sealing test device for a spring safety valve according to the present application (with a safety valve outlet pipe clamped thereon) in another use state;

[0046] Figure 5 Fig. 5 is a perspective view of an assembly structure of a filter assembly and a water tank wall surface connected therewith according to the present application;

[0047] Figure 6 Fig. 6 is another perspective view of an assembly structure of a filter assembly and a water tank wall surface connected therewith according to the present application;

[0048] Figure 7 Fig. 7 is a sectional view of a filter assembly according to the present application;

[0049] Figure 8 Fig. 8 is a perspective view of a first clamping strip according to the present application. DETAILED DESCRIPTION

[0050] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0051] It should be noted that, for the convenience of illustration, in the drawings, only the outlet pipe and its flange of the safety valve are shown, and other parts of the main structure are not shown, and the structure of the spring safety valve of the prior art is referred to.

[0052] Please refer to Figures 1-8 The sealing test device of the spring safety valve according to the present application includes a safety valve calibration table (not shown), a clamping assembly 10, an upper water pipe 30, an outlet water pipe 20, a water supply pump 40, a water pump inlet pipe (not shown in the drawings), and a water tank 50.

[0053] The safety valve is installed on the safety valve calibration table, and the clamping assembly 10 is tightly clamped on the outlet flange of the safety valve.

[0054] One end of the upper water pipe 30 and the outlet water pipe 20 respectively penetrates the clamping assembly 10, and the other end is respectively placed in the outlet pipe 90 of the safety valve; the other end of the upper water pipe 30 is connected with the outlet of the water supply pump 40; the other end of the outlet water pipe 20 penetrates the water tank 50;

[0055] The water supply pump 40 is installed on the water tank 50; one end of the water pump inlet pipe is connected with the inlet of the water supply pump 40, and the other end penetrates the water tank 50 and is placed at the bottom of the inner cavity of the water tank 50;

[0056] The water supply pump 40 is used to transport the water in the water tank 50 to the outlet pipe 90 of the safety valve.

[0057] The sealing test device of the spring safety valve according to the present application, by filling water into the outlet pipe 90 of the safety valve, then placing the safety valve on the safety valve calibration table, observing the air leakage of the valve disc of the safety valve, including observing the bubble condition, the corrugation condition, and listening to the sound, etc., accurately understand the sealing performance of the safety valve. Compared with the prior art, the scheme of the present application is more accurate and reliable.

[0058] The working principle of the sealing test device of the spring safety valve according to the present application is as follows:

[0059] The safety valve is installed on the safety valve testing platform, then the inlet pipe of the safety valve is pressurized, and the outlet of the safety valve is clamped and fastened by the clamping assembly 10, the water in the water tank 50 is pumped to the outlet of the safety valve by the water supply pump 40 until the water level exceeds the valve disc. At this time, the sealing condition of the safety valve can be observed, including observing the ripples of the liquid surface, listening to the sound, observing the bubble condition, etc., which can more accurately know the sealing condition.

[0060] The water in the water tank 50 enters the water supply pump 40 through the water pump inlet pipe, and the water outlet of the water supply pump 40 enters the outlet pipe 90 of the safety valve through the water inlet pipe 30; the water flowing out of the safety valve outlet pipe 90 flows back into the water tank 50 through the water outlet pipe 20.

[0061] In some preferred embodiments, the clamping assembly 10 includes a baffle 11, a first clamping strip 13, a second clamping strip 14, and a locking bolt (not marked in the figure);

[0062] The middle part of the baffle 11 is circular, and the two sides are square; and the end of the square structure of the baffle 11 is formed with an alignment hole A;

[0063] The two ends of the first clamping strip 13 are respectively formed with assembly holes (not marked in the figure) matched with the alignment hole A;

[0064] The two ends of the second clamping strip 14 are respectively formed with assembly holes matched with the alignment hole A;

[0065] The first clamping strip 13 and the second clamping strip 14 are placed in parallel; the locking bolt penetrates the alignment hole A and the assembly hole respectively, and is used to connect and fasten the first clamping strip 13 and the baffle 11, and is used to connect and fasten the second clamping strip 14 and the baffle 11;

[0066] One end of the water inlet pipe 30 and one end of the water outlet pipe 20 respectively penetrate the middle part of the circular structure of the baffle 11.

[0067] When assembling the safety valve and the clamping assembly 10, the center of the valve and the baffle 11 is aligned, then the first clamping strip 13 and the second clamping strip 14 clamp the flange surface of the safety valve respectively, and the outlet pipe 90 of the safety valve is placed between the first clamping strip 13 and the second clamping strip 14, and the first clamping strip 13 and the second clamping strip 14 are assembled and fastened with the baffle 11 by the locking bolt, at this time, the connection of the safety valve and the clamping assembly 10 is fastened.

[0068] The distance between the two adjacent assembly holes is the same as the distance between the two adjacent alignment holes A, so as to ensure the alignment and assembly effect of the connection of the first clamping strip 13, the second clamping strip 14 and the baffle 11.

[0069] The matching of the assembly holes and the alignment holes A refers to that the lateral spacing of the alignment holes A on both sides of the baffle 11 is equal to the lateral spacing of the assembly holes at both ends of the first clamping strip 13, and is also equal to the lateral spacing of the assembly holes at both ends of the second clamping strip 14. The matching of the assembly holes and the alignment holes A also refers to that, in the vertical direction, the spacing of the adjacent two alignment holes A on the same side is equal to the spacing of the adjacent two assembly holes on the same side.

[0070] In some preferred embodiments, the clamping assembly 10 further comprises a conical cover 22 fixed at the middle part of the baffle 11, and a circular hole is formed in the baffle 11 and located in the conical cover 22;

[0071] The sealing rubber 12 is fixed on the circular structure of the baffle 11, and the sealing rubber 12 and the conical cover 22 are located on both sides of the baffle 11, respectively.

[0072] One end of the water inlet pipe 30 penetrates through the conical cover 22, one end of the water outlet pipe 20 is connected with the end of the conical cover 22, and the water outlet pipe 20 communicates with the inner cavity of the conical cover 22.

[0073] The conical cover 22 is arranged to facilitate drainage, and the sealing rubber 12 is arranged to enhance the sealing effect between the flange of the safety valve and the baffle 11.

[0074] In some preferred embodiments, a plurality of alignment holes A are formed on the two square structures of the baffle 11 at equal intervals, respectively.

[0075] In some preferred embodiments, an electric control valve (not shown) is arranged on the water outlet pipe 20.

[0076] In some schemes, an electric control valve is arranged on the water outlet pipe 20 to control the opening and closing of the water outlet pipe 20. When the water outlet pipe 20 needs to be opened, the electric control valve is opened; when the water outlet pipe 20 needs to be closed, the electric control valve is closed.

[0077] In some preferred embodiments, a support seat 16 and a matching column 15 are further included.

[0078] Two support seats 16 are installed on the upper surface of the water tank 50, respectively, and a plurality of matching grooves B are formed on the top surface of the support seat 16.

[0079] A plurality of matching columns 15 are arranged on the side surface of the baffle 11 located at the conical cover 22, one group of the matching columns 15 is detachably assembled with the matching grooves B on one support seat 16, and another group of the matching columns 15 is detachably assembled with the matching grooves B on another support seat 16.

[0080] In the embodiment in which the support seat 16 and the matching column 15 are installed, the working principle is as follows:

[0081] Drainage through the outlet pipe 20, in the absence of external power, can only drain most of the water, and the technical solution provided with the support seat 16, in the drainage operation, the safety valve can be removed from the calibration platform, and then the safety valve and the clamping assembly 10 are inverted and buckled on the support seat 16. The assembly connection of the matching column 15 on the baffle 11 and the matching groove B of the support seat 16 realizes the alignment installation and ensures the stable placement of the safety valve.

[0082] In some preferred embodiments, a filtering assembly 60 is further included; the filtering assembly 60 is placed in the water tank 50 and connected with the other end of the outlet pipe 20.

[0083] The filtering assembly 60 is provided, which can filter the water discharged from the safety valve and then return to the water tank 50.

[0084] In some preferred embodiments, the filtering assembly 60 includes a box body 61, a first filter layer 62, a second filter layer 63, and a third filter layer 64.

[0085] The upper part of the box body 61 is in the shape of an isosceles trapezoid in cross section, and the lower part is in the shape of a rectangle in cross section.

[0086] The upper part of the box body 61 forms a cavity.

[0087] The first filter layer 62, the second filter layer 63, and the third filter layer 64 are respectively located in the lower part of the box body 61.

[0088] The other end of the outlet pipe 20 is connected with the upper part of the box body 61 and communicates with the cavity of the box body 61.

[0089] The bottom surface of the box body 61 is formed with a plurality of water-permeable holes 65.

[0090] One end of the box body 61 is buckled on the inner wall of the water tank 50, and the box body 61 is provided with a card, and the inner wall of the water tank 50 is provided with a card groove, and the card is buckled and connected with the card groove.

[0091] The water flowing out of the outlet pipe 20 first enters the box body 61, and the upper part of the box body 61 has a cavity which can provide a space for water distribution. Then the water flows downward in turn and is filtered by the first filter layer 62, the second filter layer 63, and the third filter layer 64, respectively. Then, the water is discharged from the water-permeable holes 65 in the bottom surface of the box body 61.

[0092] The first filter layer 62, the second filter layer 63 and the third filter layer 64 can be a layer structure of any one of physical filter materials such as activated carbon, quartz sand, ceramic filter element, PP cotton (polypropylene fiber) and stainless steel filter screen, or a layer structure of any one of chemical filter materials, biological filter materials and membrane filter materials.

[0093] In some preferred embodiments, the filter assembly 60 further comprises a grid net (not shown) and a sponge layer (not shown).

[0094] The grid net is transversely installed in the water tank 50 and is arranged below the box body 61.

[0095] The sponge layer is laid on the grid net.

[0096] The other end of the water pump inlet pipe is arranged below the grid net.

[0097] The water discharged from the water-permeable hole 65 enters the bottom of the water tank 50 after being filtered again by the sponge layer. The grid net is used to support the sponge layer.

[0098] The grid net is installed in the middle or even the upper part of the water tank 50, thereby providing more water storage space for the water tank 50.

[0099] In some preferred embodiments, the two ends of the first clamping strip 13 are respectively formed with circular expansion portions; the two ends of the second clamping strip 14 are respectively formed with circular expansion portions.

[0100] The assembly hole is located in the expansion portion.

[0101] The expansion portion is used to provide more assembly holes, thereby ensuring that the first clamping strip 13 and the second clamping strip 14 are more tightly assembled with the baffle 11.

[0102] In some preferred embodiments, the surfaces of the first clamping strip 13 and the second clamping strip 14 and along the length direction thereof are respectively formed with reinforcing ribs 131.

[0103] The reinforcing ribs 131 are used to ensure the structural stability of the first clamping strip 13 and the second clamping strip 14 and prevent the bending deformation of the first clamping strip 13 and the second clamping strip 14.

[0104] It should be noted that the water used in the present application is preferably soft water.

[0105] The sealing test device of the exemplary spring safety valve is more convenient for observing the leakage of the safety valve and judging, and the material can be reused, which is green and environmentally friendly.

[0106] The above embodiments only express several implementation ways of the present application, and the description is specific and detailed, but it should not be understood as a limitation to the patent scope. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A sealing test device for a spring-loaded safety valve, characterized in that: Includes a safety valve calibration bench, clamping assembly, water inlet pipe, water outlet pipe, water supply pump, water pump inlet pipe, and water tank; A safety valve is installed on the safety valve testing platform, and the clamping assembly is fastened to the outlet flange of the safety valve. One end of the water inlet pipe and the water outlet pipe respectively passes through the clamping assembly, and their ends are respectively placed inside the outlet pipe of the safety valve; the other end of the water inlet pipe is connected to the outlet of the water supply pump; the other end of the water outlet pipe passes through the water tank. The water supply pump is installed on the water tank; one end of the water pump inlet pipe is connected to the inlet of the water supply pump, and the other end passes through the water tank and is placed at the bottom of the inner cavity of the water tank; The water supply pump is used to deliver water from the water tank to the outlet pipe of the safety valve.

2. The sealing test device for the spring-loaded safety valve according to claim 1, characterized in that: The clamping assembly includes a baffle, a first clamping bar, a second clamping bar, and a locking bolt; The baffle is circular in the middle and square on both sides; and the square structure of the baffle has alignment holes at its ends. The first clamping bar has assembly holes at both ends that mate with the alignment holes; The two ends of the second clamping bar are respectively formed with assembly holes that mate with the alignment holes; The first clamping bar and the second clamping bar are placed parallel to each other; the locking bolts pass through the alignment hole and the assembly hole respectively, and are used to connect and fasten the first clamping bar to the baffle, and to connect and fasten the second clamping bar to the baffle. One end of the water inlet pipe and one end of the water outlet pipe respectively penetrate the middle of the circular structure of the baffle.

3. The sealing test device for the spring-loaded safety valve according to claim 2, characterized in that: The clamping assembly also includes a conical cover and a sealing gasket. The conical cover is fixed to the middle of the baffle, and a circular hole is provided on the baffle and inside the conical cover. The sealing gasket is fixed to the circular structure of the baffle, and the sealing gasket and the conical cover are respectively located on both sides of the baffle; One end of the water inlet pipe passes through the conical cover, one end of the water outlet pipe is connected to the end of the conical cover, and the water outlet pipe communicates with the inner cavity of the conical cover.

4. The sealing test device for the spring-loaded safety valve according to claim 2, characterized in that: The two square structures of the baffle are provided with a plurality of alignment holes at equal intervals; An electrically controlled valve is installed on the water outlet pipe.

5. The sealing test device for the spring-loaded safety valve according to claim 3, characterized in that: It also includes support bases and mating columns; The two support bases are respectively installed on the upper surface of the water tank, and the top surface of the support bases is provided with multiple mating grooves; The baffle has a plurality of mating posts on one side surface of the conical cover; one set of the mating posts is detachably assembled with the mating groove on one of the support seats, and another set of the mating posts is detachably assembled with the mating groove on another support seat.

6. The sealing test device for a spring-loaded safety valve according to any one of claims 1-5, characterized in that: It also includes a filter assembly; the filter assembly is placed inside the water tank and connected to the other end of the outlet pipe.

7. The sealing test device for the spring-loaded safety valve according to claim 6, characterized in that: The filter assembly includes a housing, a first filter layer, a second filter layer, and a third filter layer; The upper cross-section of the box is an isosceles trapezoid, and the lower cross-section is rectangular. The upper part of the box body forms a cavity; The first filter layer, the second filter layer, and the third filter layer are respectively located at the lower part of the housing; The other end of the water outlet pipe is connected to the upper part of the box body and communicates with the cavity of the box body; The bottom surface of the box has multiple water-permeable holes.

8. The sealing test device for the spring-loaded safety valve according to claim 7, characterized in that: The filter assembly also includes a grid and a sponge layer; The bar screen is installed horizontally inside the water tank, and the bar screen is positioned below the box body; The sponge layer is laid on the grid mesh; The other end of the water pump inlet pipe is positioned below the grid mesh.

9. The sealing test device for a spring-loaded safety valve according to any one of claims 2-5, characterized in that: The first clamping bar has circular expansions at both ends; the second clamping bar also has circular expansions at both ends. The assembly hole is located in the expansion section.

10. The sealing test device for a spring-loaded safety valve according to any one of claims 2-5, characterized in that: The first clamping bar and the second clamping bar each have reinforcing ribs formed on their surfaces and along their length.

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