Valve casing sealing pressure testing device
By designing an arc-shaped chamfered sealing disc and a clamping bracket fixing structure, the problem of the sealing disc easily popping out during valve body sealing performance testing was solved, achieving stable sealing performance testing under high pressure and improving the accuracy and safety of the test.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG KAICHENG MASCH CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-04-17
AI Technical Summary
Existing valve body sealing testing devices are prone to causing the sealing disc to pop out under high pressure, resulting in testing failure and safety hazards, making it difficult to achieve stable sealing.
A valve housing sealing pressure testing device was designed. It adopts the arc-shaped chamfer structure and protrusion of the sealing disc, combined with the clamping frame and bolt fixation to ensure that the sealing disc is stably positioned in the valve housing through hole, and realizes the sealing performance test through the sealing strip and high-pressure air pipe connection port.
This improves the accuracy and safety of valve body sealing tests, ensuring that the sealing disc is not easily ejected under high pressure, and enhances the stability and precision of the tests.
Smart Images
Figure CN224136819U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve body processing and testing technology, and in particular to a valve shell sealing pressure testing device. Background Technology
[0002] After the valve body is machined, its sealing performance needs to be tested. However, since the valve body often has multiple through holes, these holes need to be sealed. Current sealing methods involve adding a sealing disc from the outside of the valve body into the through holes. However, securing the sealing disc is relatively difficult, and external obstructions are typically used. But because high pressure is applied to the valve body during testing, when the pressure reaches a high value, the sealing disc can easily be pushed outwards, causing it to pop out, resulting in test failure and potentially a safety hazard.
[0003] Therefore, there is an urgent need to design a device that can test the valve body sealing pressure safely and stably. Utility Model Content
[0004] To address the aforementioned technical deficiencies, this invention provides a valve housing sealing pressure testing device that can firmly fix the sealing disc inside the through hole, thereby improving safety during the testing process.
[0005] This utility model discloses a valve body sealing pressure testing device, including a sealing disc, a clamping frame, and connecting bolts. One end of the sealing disc has a circumferential sidewall that protrudes outward to form an annular protrusion. A step is formed between the protrusion and the sidewall of the sealing disc. The diameter of the sealing disc is slightly smaller than the diameter of the valve body through-hole. A groove is provided on the circumferential sidewall of the sealing disc, and a sealing strip is placed within the groove. The sealing strip protrudes from the circumferential sidewall of the sealing disc, and its maximum outer diameter is slightly larger than the diameter of the valve body through-hole. The outer diameter of the protrusion is larger than the diameter of the valve body through-hole. Arc-shaped chamfers are provided at both ends of the same diameter of the sealing disc, with the chamfers arranged along the tangent direction of the diameter. The diameter of the arc-shaped chamfers is smaller than or equal to the diameter of the valve body through-hole. The groove and sealing strip on the sealing disc are located outside the range of the arc-shaped chamfers. The clamping frame is located outside the valve body through-hole and is connected to the sealing disc by bolts.
[0006] Two grooves are spaced apart on the circumferential sidewall of the sealing disc, and a sealing strip is installed in each of the two grooves.
[0007] The sealing disc is provided with a high-pressure air pipe connection port and a pressure gauge connection port, both of which pass through the axial position of the sealing disc.
[0008] A lifting lug is provided on the circumferential sidewall of the protrusion of the sealing disc. A screw is provided on the lifting lug, and a screw hole is provided on the protrusion. The lifting lug and the protrusion are connected by a thread. The lifting lug is located at one end of the diameter of the sealing disc that is perpendicular to the diameter of the arc-shaped chamfer.
[0009] The valve housing sealing pressure testing device obtained by this utility model can insert the sealing disc into the valve housing through the corresponding through hole by means of the arc-shaped chamfer on both sides of the sealing disc. The through hole is blocked by the sealing disc and the protrusion is used to restrict it within the through hole. During the test, high pressure is applied inside the valve housing, which can also ensure the stability of the sealing disc and good sealing between it and the through hole. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of this utility model;
[0011] Figure 2 This is a front view of the sealing disc of this utility model;
[0012] Figure 3 for Figure 2 Schematic diagram of AA section;
[0013] Figure 4 This is a bottom view of the sealing disc structure of this utility model;
[0014] Figure 5 This is a three-dimensional view of the sealing disc of this utility model. Detailed Implementation
[0015] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0016] Example 1:
[0017] like Figure 1 As shown, this utility model discloses a valve body sealing pressure testing device, including a sealing disc 2, a clamping frame 3, and connecting bolts 4, as follows. Figure 2-5As shown, the circumferential sidewall of one end of the sealing disc 2 protrudes outward to form a ring-shaped protrusion 6. The protrusion 6 and the sidewall of the sealing disc 2 form a step. The diameter of the sealing disc 2 is slightly smaller than the diameter of the through hole of the valve body 1. A groove 9 is provided on the circumferential sidewall of the sealing disc 2. A sealing strip 10 is provided in the groove 9. The sealing strip 10 protrudes from the circumferential sidewall of the sealing disc 2. The maximum outer diameter of the sealing strip 10 is slightly larger than the diameter of the through hole of the valve body 1. The outer diameter of the protrusion 6 is larger than the diameter of the through hole of the valve body 1. Arc-shaped chamfers are provided at both ends of the same diameter of the sealing disc 2. The arc-shaped chamfers are provided along the tangent direction of the diameter. The diameter of the arc-shaped chamfers is smaller than or equal to the diameter of the through hole of the valve body. The groove 9 and the sealing strip 10 on the sealing disc 2 are located outside the range of the arc-shaped chamfers. The clamping frame 3 is provided outside the through hole of the valve body 1. The clamping frame 3 is connected to the sealing disc 2 by bolts 4.
[0018] To allow the sealing disc 2 to seal the through hole from the inside of the valve body 1 outwards, the sealing disc 2 needs to be inserted into the valve body 1 through the through hole. However, to ensure that the sealing disc 2 can firmly mate with the inner wall of the through hole, a protrusion 6 is provided on the circumferential side wall of the sealing disc 2. The diameter of the protrusion 6 is larger than the diameter of the through hole. During mating, the protrusion 6 can abut against the valve body 1 at the edge of the through hole to withstand greater pressure. However, this prevents the sealing disc 2 and the protrusion 6 from passing through the through hole. Therefore, this design incorporates arc-shaped chamfers at both ends of the same diameter of the sealing disc 2. Preferably, the diameter of the arc-shaped chamfer is smaller than the diameter of the valve body through hole, but more preferably, the diameter of the arc-shaped chamfer is equal to or slightly larger than the diameter of the sealing disc 2.
[0019] The curved chamfers are located at both ends of one diameter of the sealing disc 2, and are positioned along the tangent direction of that diameter. Specifically, the curved chamfers are located at both ends of one diameter of the sealing disc 2, and are processed along the tangent direction of the sealing disc 2 perpendicular to that diameter. That is, the axial direction of the sealing disc 2 is horizontal, and the diameter containing the curved chamfers is also horizontal. Then, the curved chamfers are processed at both ends of the sealing disc 2, removing the portion of the sealing disc 2 and the portion of the protrusion 6 within the range of the curved chamfer. Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown. The chamfered sealing disc 2 can pass through the through hole of the valve housing 1 and enter the interior of the valve housing 1. Since the protrusion 6 at the chamfered end is cut off within the chamfered area, but the two ends without the chamfered end have protrusions 6, when the sealing disc 2 is in the through hole, the protrusions 6 abut against the valve housing 1 on the side of the through hole, thereby ensuring that the sealing disc 2 is always kept in the through hole during the pressurization process inside the valve housing 1, resulting in higher detection accuracy and safety.
[0020] When the sealing disc 2 is located in the through hole, a clamping frame 3 can be set outside the through hole. The clamping frame 3 is fixed to the sealing disc 2 by bolts 4. This allows the sealing disc 2 to be tightly attached to the inside of the through hole before pressurization, and to remain stable after pressurization, while also ensuring the sealing performance.
[0021] Under normal circumstances, the diameter of the sealing disc 2 is slightly smaller than the diameter of the through hole, which is generally only 0.5-1.2mm smaller. After the sealing strip 10 is assembled into the groove 9, it protrudes from the circumferential sidewall of the sealing disc 2 by 1.4-1.6mm. Therefore, when the sealing disc 2 is pressed against the through hole, the sealing strip 10 is in a deformed state, thereby sealing the through hole to facilitate pressure testing inside the valve body 1.
[0022] Two grooves 9 are spaced apart on the circumferential sidewall of the sealing disc 2, and a sealing strip 10 is installed in each of the two grooves 9. The interval between the two grooves 9 is relatively small. Under normal circumstances, when the diameter of the arc-shaped chamfer is larger than the diameter of the sealing disc 2 but smaller than the diameter of the through hole, both grooves 9 are located outside the arc-shaped chamfer to ensure the integrity of the grooves 9. This ensures a stable effect on the sealing strip 10. The installation of two sealing strips 10 can effectively improve the sealing effect, ensure that there is little air leakage at the through hole, and thus improve the accuracy of pressure detection of the valve body 1.
[0023] A high-pressure air pipe connection port 8 and a pressure gauge connection port 7 are provided on the sealing disc 2, and both the high-pressure air pipe connection port 8 and the pressure gauge connection port 7 pass through the axial position of the sealing disc 2.
[0024] If valve body 1 has a built-in high-pressure air hose connection point, the high-pressure air hose can be directly connected to valve body 1. If valve body 1 does not have a high-pressure air hose connection point and only has a few through holes, then a high-pressure air hose connection port 8 is provided on the sealing plate 2. This is a threaded hole, allowing air to be injected into the valve body 1 after the high-pressure air hose is connected to achieve pressure testing. A pressure gauge connection port 7 is provided on the sealing plate 2. This threaded hole allows for the installation of a pressure gauge to display the pressure inside valve body 1, facilitating pressure control by the operator and enabling faster detection of pressure abnormalities.
[0025] A lifting lug 5 is provided on the circumferential side wall of the protrusion 6 of the sealing disc 2. A screw is provided on the lifting lug 5, and a screw hole 11 is provided on the protrusion 6. The lifting lug 5 and the protrusion 6 are connected by a thread. The lifting lug 5 is located at the end of the diameter of the sealing disc 2 that is perpendicular to the diameter of the arc chamfer.
[0026] Because the valve body 1 is relatively large overall, the through hole size is also large, and the diameter of the sealing disc 2 is also relatively large. The overall weight of the sealing disc 2 and the protrusion 6 is also large. However, since the size of the sealing disc 2 after the arc-shaped chamfer is close to that of the through hole, the sealing disc 2 still needs to be in the axial position of the through hole to enter the valve body 1. Manual operation is difficult, and robotic operation also requires a very large clamping force to avoid damaging the sealing disc 2 and affecting the sealing effect. Therefore, this design sets a lifting lug 5 on the protrusion 6, and the lifting lug 5 is located at the end of the diameter perpendicular to the diameter of the arc-shaped chamfer. In actual use, the position of the valve body 1 can be adjusted so that the through hole is vertically upward. Then, the lifting lug 5 is connected using a crane. At this time, the sealing disc 2 is in a basically vertical position, and the operator can straighten it. The arc-shaped chamfer is located on both sides. Then, it is aligned with the through hole, and the sealing disc 2 can be quickly placed inside the valve body 1. Then, the sealing disc 2 is connected using bolts 4, and the lifting lug 5 is removed to place the sealing disc 2 in the through hole. This operation is fast, efficient, and easy to perform. In addition, if the space of the valve body 1 at the edge of the through hole allows, the lifting lug 5 does not need to be disassembled, further improving efficiency.
[0027] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A valve casing seal pressure test device characterized by: The device includes a sealing disc, a clamping frame, and connecting bolts. One end of the sealing disc has a circumferential sidewall that protrudes outward to form a ring-shaped protrusion. A step-like structure is formed between the protrusion and the sidewall of the sealing disc. The diameter of the sealing disc is slightly smaller than the diameter of the valve body through-hole. A groove is provided on the circumferential sidewall of the sealing disc, and a sealing strip is placed within the groove. The sealing strip protrudes from the circumferential sidewall of the sealing disc, and its maximum outer diameter is slightly larger than the diameter of the valve body through-hole. The outer diameter of the protrusion is larger than the diameter of the valve body through-hole. Arc-shaped chamfers are provided at both ends of the same diameter of the sealing disc, with the chamfers tangential to the diameter. The diameter of the arc-shaped chamfers is smaller than or equal to the diameter of the valve body through-hole. The groove and sealing strip on the sealing disc are located outside the arc-shaped chamfers. The clamping frame is located outside the valve body through-hole and is connected to the sealing disc by bolts.
2. A valve chest seal pressure testing device according to claim 1, wherein: Two grooves are spaced apart on the circumferential sidewall of the sealing disc, and a sealing strip is installed in each of the two grooves.
3. A valve chest seal pressure testing device according to claim 1 or 2, wherein: The sealing disc is provided with a high-pressure air pipe connection port and a pressure gauge connection port, both of which pass through the axial position of the sealing disc.
4. The valve chest seal pressure testing device of claim 1, wherein: A lifting lug is provided on the circumferential sidewall of the protrusion of the sealing disc. A screw is provided on the lifting lug, and a screw hole is provided on the protrusion. The lifting lug and the protrusion are connected by a thread. The lifting lug is located at one end of the diameter of the sealing disc that is perpendicular to the diameter of the arc-shaped chamfer.