Anti-knock pressure measuring exhaust joint

Abstract

This invention provides an explosion-proof pressure testing and venting connector, comprising a connector body and a pressure cap disposed above the connector body. The connector body contains a screw plug, an venting valve core, a pin valve core, and an explosion-proof valve core. The screw plug is fixed to a first end of the connector body, and the venting valve core passes through the screw plug. The explosion-proof valve core passes through a second end of the connector body, and the pin valve core is disposed within a cavity of the connector body between the venting valve core and the explosion-proof valve core. A spring is provided between the pin valve core and the explosion-proof valve core. The explosion-proof pressure testing and venting connector is installed at the location where pressure testing and venting are required on high-pressure vessels or pipelines. It is installed via a threaded connection and externally connected to a pressure testing hose, allowing the pressure testing equipment to be brought out externally. This avoids the limitations of on-site equipment operation and enables direct online monitoring of pressure equipment. Simultaneously, it avoids high-pressure leakage accidents caused by hose rupture, increasing the reliability and safety of equipment operation, and has good economic and social benefits in engineering applications.

Description

Technical Field

[0001] This invention relates to the field of equipment safety technology, specifically to an explosion-proof pressure testing and venting connector. Background Technology

[0002] In hydropower projects, hydraulic gate hoists are a commonly used gate opening and closing device. To more accurately detect the working status of the gate hoist, it is necessary to monitor the working pressure inside the hydraulic cylinder online. A pressure testing and venting connector is installed in the cylinder body for pressure testing. Since the cylinder body operates at high pressure for a long time, if the external pressure testing hose ruptures and is not dealt with in time, it will cause high-pressure leakage, pollute the environment, and cause the operated gate to slide down, affecting the operation of the gate and even causing safety accidents. Therefore, the pressure testing method using external pressure testing hoses is widely used in situations where equipment is visible and high pressure is required for short periods of time. However, considering the serious consequences of hose rupture, online pressure testing of the hydraulic cylinder body operating at high pressure for a long time has not been used. Summary of the Invention

[0003] The main objective of this invention is to provide an explosion-proof pressure testing and exhaust connector, which aims to effectively solve the problems in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An explosion-proof pressure testing and exhaust connector includes a connector body and a pressure cap disposed above the connector body. The connector body is provided with a screw plug, an exhaust valve core, a pin valve core, and an explosion-proof valve core.

[0006] The screw plug is fixed to the first end of the connector body, and the exhaust valve core is inserted through the screw plug; the explosion-proof valve core is inserted through the second end of the connector body, and the pin valve core is disposed in the cavity of the connector body between the exhaust valve core and the explosion-proof valve core;

[0007] The second end of the connector body is provided with a first air passage, which is used to connect the inner cavity of the connector body where the valve core is located with the outside of the second end of the connector body. The explosion-proof valve core has a rod body and a cover body, and the cover body is used to cover or open the first air passage.

[0008] The upper end of the ejector valve core is provided with a second air passage. The second air passage is used to connect the upper cavity and the lower cavity of the connector body where the ejector valve core is located. The top surface of the ejector valve core and the bottom surface of the screw plug cooperate to cover or open the second air passage.

[0009] The exhaust valve core is provided with a third air passage, which is used to connect the inner cavity of the connector body where the ejector valve core is located with the outside of the pressure cap side.

[0010] A spring is provided between the ejector valve core and the explosion-proof valve core;

[0011] A sealing gasket is provided on the contact surface between the bottom surface of the screw plug and the connector body;

[0012] The bottom surface of the screw plug is provided with a first O-ring, which falls into the inner side of the circumference where the second air passage is located on the ejector valve core, so as to form a seal between the first O-ring and the top surface of the ejector valve core for the second air passage.

[0013] A second O-ring is provided between the inner side of the screw plug and the exhaust valve core to form a seal with the outer side wall of the exhaust valve core;

[0014] The bottom surface of the connector body is provided with a third O-ring; the third O-ring falls into the inner side of the cover of the explosion-proof valve core to form a seal between the explosion-proof valve core and the first air passage.

[0015] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0016] As a preferred technical solution of the present invention: the explosion-proof valve core is provided with a nut on the periphery of the rod body in the connector body, and the explosion-proof valve core is limited to the connector body by the cooperation of the rod body and the nut, so that the explosion-proof valve core has space to slide up and down.

[0017] As a preferred embodiment of the present invention, the inner side of the pressure cap is threadedly connected to the connector body.

[0018] As a preferred technical solution of the present invention: the outer side of the screw plug is threadedly connected to the connector body.

[0019] As a preferred embodiment of the present invention: a protrusion is provided on the outer side wall of the connector body, and an adjusting shim is provided between the protrusion and the side wall of the pressure cap.

[0020] As a preferred technical solution of the present invention: the connector body has an external thread on the outer side of the end with the explosion-proof valve core, so as to connect to the high-pressure container or pipeline that needs to be pressure measured and vented.

[0021] This invention provides an explosion-proof pressure testing and venting connector, which has the following advantages: The explosion-proof pressure testing and venting connector is installed at the location where pressure testing and venting are required on high-pressure vessels or pipelines (e.g., through threaded connection). An external pressure testing hose is connected to extend the pressure testing equipment externally, avoiding the limitations of on-site equipment operation. Online pressure testing of the equipment can be directly achieved through the cooperation of the first, second, and third air passages. Furthermore, by covering the first air passage with an explosion-proof valve core, high-pressure leakage accidents caused by hose rupture can be avoided, increasing the reliability and safety of equipment operation. This has good economic and social benefits in engineering applications. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the explosion-proof pressure testing and exhaust connector provided by the present invention;

[0023] Figure 2 This is a schematic diagram of the pressure measurement operation.

[0024] Figure 3 This is a schematic diagram illustrating the explosion-proof design in the event of a ruptured external flexible hose.

[0025] Figure 4 A schematic diagram for venting the connector;

[0026] In the diagram: 1-Connector body; 2-Gland; 3-Plug; 4-Exhaust valve core; 5-Pin valve core; 6-Explosion-proof valve core; 7-Spring; 8-Adjusting shim; 9-Sealing gasket; 10-First O-ring; 11-Second O-ring; 12-Third O-ring; 13-Nut; 14-First air passage; 15-Second air passage; 16-Third air passage. Detailed Implementation

[0027] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1 As shown, an explosion-proof pressure testing and exhaust connector includes a connector body 1 and a pressure cap 2 disposed above the connector body 1. The connector body 1 is provided with a screw plug 3, an exhaust valve core 4, a pin valve core 5, and an explosion-proof valve core 6.

[0029] The screw plug 3 is fixed to the upper end of the connector body 1, and the exhaust valve core 4 is inserted through the screw plug 3; the explosion-proof valve core 6 is inserted through the lower end of the connector body 1, and the pin valve core 5 is disposed in the cavity of the connector body 1 between the exhaust valve core 4 and the explosion-proof valve core 6.

[0030] The lower end of the connector body 1 is provided with a first air passage 14. The first air passage 14 is used to connect the inner cavity of the connector body 1 where the pin valve core 5 is located with the outside of the lower end of the connector body 1. The explosion-proof valve core 6 has a rod body and a cover body. The cover body is used to cover or open the first air passage 14.

[0031] The upper end of the ejector valve core 5 is provided with a second air passage 15. The second air passage 15 is used to connect the upper cavity and the lower cavity of the inner cavity of the connector body 1 where the ejector valve core 5 is located. The top surface of the ejector valve core 5 and the bottom surface of the screw plug 3 cooperate to cover or open the second air passage 15.

[0032] The exhaust valve core 4 is provided with a third air passage 16, which is used to connect the inner cavity of the connector body 1 where the ejector valve core 5 is located with the outside of the pressure cap 2.

[0033] A spring 7 is provided between the ejector valve core 5 and the explosion-proof valve core 6, and the spring 7 realizes the automatic reset of the ejector valve core 5.

[0034] A sealing gasket 9 is provided on the contact surface between the bottom surface of the screw plug 3 and the connector body 1;

[0035] The bottom surface of the screw plug 3 is provided with a first O-ring 10. The first O-ring 10 falls into the inner side of the circumference where the second air passage 15 is located on the ejector valve core 5, so as to form a seal between the first O-ring 10 and the top surface of the ejector valve core 5 for the second air passage 15.

[0036] A second O-ring 11 is provided between the inner side of the screw plug 3 and the exhaust valve core 4 to form a seal with the outer side wall of the exhaust valve core 4.

[0037] The opening and closing of the pressure testing and exhaust channel is achieved by changing the position of the ejector valve core 5.

[0038] The bottom surface of the connector body 1 is provided with a third O-ring 12; the third O-ring 12 falls into the inner side of the cover of the explosion-proof valve core 6 to form a seal between the explosion-proof valve core 6 and the first air passage 14.

[0039] The explosion-proof valve core 6 is located inside the connector body 1 and is provided with a nut 13 on the periphery of the rod. The explosion-proof valve core 6 is limited to the connector body 1 by the cooperation of the rod and the nut 13, so that the explosion-proof valve core 6 has space to slide up and down.

[0040] The threaded assembly of the explosion-proof valve core 6 limits its range of motion, and the pressure measurement channel of the explosion-proof valve core 6 is quickly shut off by pressure difference.

[0041] The inner side of the gland 2 is threaded to the connector body 1.

[0042] The outer side of the plug 3 is threadedly connected to the connector body 1.

[0043] The outer side wall of the connector body 1 is provided with a protrusion, and an adjusting shim 8 is provided between the protrusion and the side wall of the pressure cover 2.

[0044] The connector body 1 has an external thread on the outer side of the end with the explosion-proof valve core 6, so as to connect to the high-pressure container or pipeline that needs to be pressure tested and vented.

[0045] The connector body 1 serves as the functional valve core base and is equipped with motion guide surfaces, sealing and pressure measurement channels for each valve core.

[0046] Specifically, the above-mentioned explosion-proof pressure testing and venting connector is implemented in the following manner:

[0047] like Figure 1 As shown, in the non-pressure measurement state, the pressure measurement circuit is cut off to avoid high pressure leakage. At this time, there are two adjusting shims 8.

[0048] like Figure 2 As shown, in the pressure measurement state, the pressure measurement circuit is connected to accurately reflect the working pressure at the measurement point. At this time, there is one adjusting shim 8.

[0049] like Figure 3 As shown, when the external pressure testing hose ruptures, the pressure testing circuit should be cut off in time to avoid a high-pressure leakage accident. At this time, there is one adjusting shim 8.

[0050] like Figure 4 As shown, when the external pressure testing hose is replaced and restored, the pressure testing circuit is reconnected, and the venting function is realized at the same time. At this time, there is no adjustment shim 8.

[0051] In the initial state, the spring 7 is preloaded and contacts the bottom of the screw plug 3, forming a seal through the first O-ring 10 at the bottom of the screw plug 3 (e.g., Figure 1 As shown), a closed cavity is formed. When the pressure cap 2 is rotated and pressed down, it pushes the exhaust valve core 4 downward, causing the ejector valve core 5 to disengage from the first O-ring 10 at the bottom of the screw plug 3. Through the second air passage 15 on the ejector valve core 5, a pressure measuring channel is formed (as shown). Figure 2 (As shown); The explosion-proof valve core 6 is installed at the lower part of the connector body 1 and can slide up and down inside the connector body 1. A pressure measuring channel is set inside the connector body 1. When the external hose ruptures and high pressure leaks, a pressure difference is generated inside and outside the connector body 1, pushing the explosion-proof valve core 6 upward to contact the third O-ring 12 set on the connector body 1 to form a seal, thus blocking the pressure exhaust channel (as shown). Figure 3 As shown), after replacing the external hose, rotate the gland 2 again to press down, pushing the exhaust valve core 4 and the ejector valve core 5, causing the explosion-proof valve core 6 to disengage from the third O-ring 12 on the connector body 1, forming a reliable pressure testing and exhaust channel (as shown). Figure 4 As shown in the image, in this state, full exhaust function can be achieved.

[0052] The above specific embodiments are used to explain and illustrate the present invention, and are only preferred embodiments of the present invention, not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made to the present invention within the spirit and scope of the claims shall fall within the protection scope of the present invention.

Claims

1. An explosion-proof pressure testing and exhaust connector, comprising a connector body (1) and a pressure cap (2) disposed above the connector body (1), characterized in that: The connector body (1) is provided with a screw plug (3), an exhaust valve core (4), a pin valve core (5), and an explosion-proof valve core (6); The screw plug (3) is fixed to the first end of the connector body (1), the exhaust valve core (4) is inserted through the screw plug (3); the explosion-proof valve core (6) is inserted through the second end of the connector body (1), and the pin valve core (5) is disposed in the cavity of the connector body (1) between the exhaust valve core (4) and the explosion-proof valve core (6); The second end of the connector body (1) is provided with a first air passage (14). The first air passage (14) is used to connect the inner cavity of the connector body (1) where the pin valve core (5) is located with the outside of the second end side of the connector body (1). The explosion-proof valve core (6) has a rod body and a cover body. The cover body is used to cover or open the first air passage (14). The upper end of the ejector valve core (5) is provided with a second air passage (15). The second air passage (15) is used to connect the upper cavity and the lower cavity of the inner cavity of the connector body (1) where the ejector valve core (5) is located. The top surface of the ejector valve core (5) and the bottom surface of the screw plug (3) cooperate to cover or open the second air passage (15). The exhaust valve core (4) is provided with a third air passage (16), which is used to connect the inner cavity of the connector body (1) where the ejector valve core (5) is located with the outside of the pressure cap (2). A spring (7) is provided between the ejector valve core (5) and the explosion-proof valve core (6); The contact surface between the bottom surface of the screw plug (3) and the connector body (1) is provided with a sealing gasket (9); The bottom surface of the screw plug (3) is provided with a first O-ring (10), and the first O-ring (10) falls into the inner side of the circumference of the second air passage (15) on the ejector valve core (5) to form a seal between the second air passage (15) and the top surface of the ejector valve core (5). A second O-ring (11) is provided between the inner side of the screw plug (3) and the exhaust valve core (4) to form a seal with the outer side wall of the exhaust valve core (4); The bottom surface of the connector body (1) is provided with a third O-ring (12); the third O-ring (12) falls into the inner side of the cover of the explosion-proof valve core (6) to form a seal between the explosion-proof valve core (6) and the first air passage (14).

2. The explosion-proof pressure testing and venting connector according to claim 1, characterized in that: The explosion-proof valve core (6) is located in the connector body (1) and a nut (13) is provided on the periphery of the rod. The explosion-proof valve core (6) is limited to the connector body (1) by the cooperation of the rod and the nut (13) and the explosion-proof valve core (6) has space to slide up and down.

3. The explosion-proof pressure testing and venting connector according to claim 1, characterized in that: The inner side of the pressure cap (2) is threadedly connected to the connector body (1).

4. The explosion-proof pressure testing and venting connector according to claim 1, characterized in that: The outer side of the plug (3) is threadedly connected to the connector body (1).

5. The explosion-proof pressure testing and venting connector according to claim 1, characterized in that: The outer side wall of the connector body (1) is provided with a protrusion, and an adjusting shim (8) is provided between the protrusion and the side wall of the cover (2).

6. The explosion-proof pressure testing and venting connector according to claim 1, characterized in that: The connector body (1) has an external thread on the outer side of the end with the explosion-proof valve core (6) so as to connect to the high-pressure container or pipeline that needs to be pressure measured and vented.

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