Leak-proof pull valve

Abstract

The utility model discloses a leakproof pull valve which comprises an upper shell, a lower shell is arranged on the lower portion of the upper shell, the upper shell and the lower shell are connected through a snap bolt, an inner convex disc is fixedly connected to the interior of the upper shell, an inner concave disc is fixedly connected to the interior of the lower shell, and an inner convex disc is fixedly connected to the interior of the lower shell. The inner convex disc and the inner concave disc are connected in a clamped mode, the inner convex disc and the inner concave disc are each provided with a first bevel edge, and the inner convex disc and the inner concave disc are each provided with a clamping face. The inner convex disc and the inner concave disc which are specially designed are arranged, so that the inner convex disc and the inner concave disc can be matched with the inclined surface on the valve plate, and the aim of enhancing the sealing performance is fulfilled. The inner convex disc and the inner concave disc are respectively provided with a first bevel edge and a clamping surface, the design not only increases the contact area, but also utilizes the design of the bevel edges for tight attachment, thereby improving the overall sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, especially relate to a kind of anti-leakage pull valve. BACKGROUND

[0002] As an important safety component in fluid transmission systems, pull valves are designed to automatically separate and quickly close the flow path at both ends in emergency situations to prevent dangerous substances from leaking. With the acceleration of industrialization, the transportation volume of hazardous goods such as chemicals and petroleum products is increasing year by year, which puts higher requirements on the safety and reliability of pull valves. Early pull valves were relatively simple in design, mainly relying on mechanical separation mechanisms to achieve emergency shutdown functions. However, with the development of technology, especially the progress of material science and the enhancement of environmental protection awareness, modern pull valves not only have more complex and delicate structural designs, but also have significant improvements in sealing, corrosion resistance and other aspects.

[0003] Although most pull valves on the market can meet basic safety requirements to some extent, they still have some shortcomings in actual application. Existing technical solutions for pull valves have improved the safety and reliability of equipment to some extent, but still have problems such as sealing failure under complex working conditions and inconvenient operation.

[0004] Specifically, existing technologies generally use embossed pins to connect two shafts. When the shafts inside the pull valve separate, the embossed pins are prone to block the gap between the valve plate and the protruding part, making the sealing performance poor when dealing with unexpected situations. Therefore, we propose an anti-leakage pull valve. UTILITY MODEL CONTENTS

[0005] To solve the problems existing in the prior art, the utility model aims to provide an anti-leakage pull valve. By providing specially designed internal convex and concave discs, it can cooperate with the inclined surface on the valve plate to prevent leakage. The first and second connecting shafts are connected through a sleeve clamp, and are provided with protrusions and grooves to facilitate connection and separation.

[0006] This utility model is implemented as follows: a leak-proof pull valve includes an upper housing, a lower housing at the lower part of the upper housing, the upper housing and the lower housing are connected by a pull bolt, an internal convex plate is fixedly connected inside the upper housing, and an internal concave plate is fixedly connected inside the lower housing, the internal convex plate and the internal concave plate are engaged, both the internal convex plate and the internal concave plate are provided with a first inclined edge, both the internal convex plate and the internal concave plate are provided with a engaging surface, spring valve plate devices are respectively connected to the upper housing and the lower housing, a first connecting shaft and a second connecting shaft are provided between the two spring valve plate devices, a first sleeve part is provided at the lower part of the first connecting shaft, a plurality of protrusions are fixedly connected to the upper part of the second connecting shaft, and a plurality of grooves are opened inside the first sleeve part.

[0007] Optionally, the upper housing is provided with a first flange portion, and the lower housing is provided with a second flange portion, on which a plastic sleeve portion is fixedly connected.

[0008] Optionally, one end of the upper housing is fixedly connected to a first connection port, and one end of the lower housing is fixedly connected to a second connection port, both of which are provided with internal threads.

[0009] Optionally, a copper washer is provided between the inner convex disk and the inner concave disk, and a rubber washer is provided between the inner convex disk and the inner concave disk.

[0010] Optionally, the spring valve plate device includes a first connecting plate, on which an embossed valve spindle is slidably connected, and a bushing is fitted on the outer side of the embossed valve spindle.

[0011] Optionally, a first spring is fitted on the outer side of the bushing, one end of the first spring is fixedly connected to a spring seat, and the other end of the first spring is fixedly connected to a first valve plate.

[0012] Optionally, the upper part of the first valve plate is provided with a first shaft groove for engaging with the embossed valve core shaft, and the lower part of the first valve plate is provided with a second shaft groove.

[0013] Optionally, a second connecting plate is welded to the upper shell and the lower shell respectively, and the second connecting plate is connected to the first connecting plate by bolts.

[0014] Optionally, the first valve plate has a second inclined edge on its left and right sides for fitting with the first inclined edge, and the first valve plate has a galvanized layer.

[0015] Optionally, mounting grooves are provided on the lower left and lower right sides of the first valve plate, and anti-leakage gaskets are adhered in the mounting grooves.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. By incorporating specially designed internal convex and concave discs that mate with the beveled surfaces on the valve plate, enhanced sealing performance is achieved. Both the internal convex and concave discs feature a first bevel and a snap-fit ​​surface. This design not only increases the contact area but also utilizes the beveled edges for a tight fit, thereby improving overall sealing. In practical applications, especially when handling high-pressure or corrosive media, this effectively prevents leakage, significantly enhancing the safety and reliability of the equipment. Furthermore, the use of copper and rubber gaskets further strengthens the sealing effect, ensuring good sealing performance even under extreme operating conditions.

[0018] 2. The first and second connecting shafts utilize a sleeve-type snap-fit ​​connection, incorporating protrusions and grooves to achieve a quick and stable connection and disengagement mechanism. This design allows the two connecting shafts to be quickly disconnected when separation is required, and ensures rapid and accurate alignment and secure connection during reassembly, greatly simplifying the maintenance process and reducing downtime. Specifically, the protrusion and groove design not only provides a snap-fit ​​function, ensuring connection stability, but also facilitates disengagement in emergency situations.

[0019] 3. By employing a spring valve plate device comprising a first spring, bushing, and other components, the function of automatically adjusting the valve plate position upon disengagement is achieved. This design allows the first valve plate to automatically adjust its position upon disengagement, maintaining a sealing state. The spring provides continuous pressure, ensuring the valve plate tightly conforms to the contact surface between the internal convex and concave discs, thus maintaining a stable seal upon disengagement. Furthermore, the application of a galvanized layer improves the valve plate's corrosion resistance, while the leak-proof gasket further enhances the sealing effect.

[0020] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a first-view structural schematic diagram provided by this utility model;

[0022] Figure 2 This is a second-view schematic diagram provided by this utility model;

[0023] Figure 3 This is an internal schematic diagram provided by this utility model;

[0024] Figure 4 This is a schematic diagram of the spring valve plate device provided by this utility model;

[0025] Figure 5 This is a schematic diagram of the connecting shaft provided by this utility model;

[0026] Figure 6 This is a schematic diagram of the internal convex disk and internal concave disk provided by this utility model.

[0027] In the diagram: 1. Upper housing; 2. Lower housing; 3. First flange; 4. Second flange; 5. Plastic sleeve; 6. Pull-out bolt; 7. Second connection port; 8. First connection port; 9. Internal thread; 10. Internal convex plate; 11. Internal concave plate; 12. Second connecting plate; 13. First connecting plate; 14. Embossed valve spindle; 15. Spring seat; 16. First spring; 17. Bushing; 18. First valve plate; 181. Second bevel; 182. Leak-proof rubber gasket; 19. First connecting shaft; 191. First sleeve; 20. Second connecting shaft; 201. Protrusion; 21. Copper washer; 22. Rubber washer; 23. First bevel; 24. Snap-fit ​​surface. Detailed Implementation

[0028] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0029] like Figures 1 to 6 As shown in the figure, this utility model provides a leak-proof pull valve.

[0030] The device includes an upper housing 1, and a lower housing 2 at the bottom of the upper housing 1. The upper housing 1 and the lower housing 2 are connected by a pull-out bolt 6. An internal convex plate 10 is fixedly connected inside the upper housing 1, and an internal concave plate 11 is fixedly connected inside the lower housing 2. The internal convex plate 10 and the internal concave plate 11 are engaged. Both the internal convex plate 10 and the internal concave plate 11 are provided with a first inclined edge 23 and a snap-fit ​​surface 24. Spring valve plate devices are respectively connected to the upper housing 1 and the lower housing 2. A first connecting shaft 19 and a second connecting shaft 20 are provided between the two spring valve plate devices. A first sleeve portion 191 is provided at the bottom of the first connecting shaft 19, and several protrusions 201 are fixedly connected to the upper part of the second connecting shaft 20. Several grooves are opened inside the first sleeve portion 191.

[0031] The upper housing 1 is provided with a first flange 3, and the lower housing 2 is provided with a second flange 4. A plastic sleeve 5 is fixedly connected to the second flange 4.

[0032] One end of the upper housing 1 is fixedly connected to a first connection port 8, and one end of the lower housing 2 is fixedly connected to a second connection port 7. Both the first connection port 8 and the second connection port 7 are provided with internal threads 9.

[0033] A copper washer 21 is provided between the inner convex plate 10 and the inner concave plate 11, and a rubber washer 22 is provided between the inner convex plate 10 and the inner concave plate 11.

[0034] The spring valve plate device includes a first connecting plate 13, on which a embossed valve spindle 14 is slidably connected and passes through, and a bushing 17 is fitted on the outside of the embossed valve spindle 14.

[0035] A first spring 16 is fitted on the outer side of the bushing 17. One end of the first spring 16 is fixedly connected to the spring seat 15, which is fixedly connected to the first connecting plate 13. The other end of the first spring 16 is fixedly connected to the first valve plate 18.

[0036] The upper part of the first valve plate 18 is provided with a first shaft groove for engaging with the embossed valve core shaft 14, and the lower part of the first valve plate 18 is provided with a second shaft groove.

[0037] A second connecting plate 12 is welded onto the upper shell 1 and the lower shell 2 respectively, and the second connecting plate 12 is connected to the first connecting plate 13 by bolts.

[0038] The first valve plate 18 has a second inclined edge 181 on its left and right sides for fitting with the first inclined edge 23, and a galvanized layer is provided on the first valve plate 18.

[0039] The lower left and lower right sides of the first valve plate 18 are respectively provided with mounting grooves, and anti-leakage gaskets 182 are adhered in the mounting grooves.

[0040] Working principle: When in use, the anti-leakage pull valve provided by this utility model achieves its function through the coordinated work of a series of precisely designed components.

[0041] First, under normal operating conditions, the upper housing 1 and the lower housing 2 are securely connected together by pull-out bolts 6. The internal convex plate 10 and the internal concave plate 11 are tightly engaged, and a copper washer 21 and a rubber washer 22 are placed between them to ensure optimal sealing. The design of the first bevel 23 makes the pressure distribution more uniform, thereby further enhancing the sealing performance. In addition, the first spring 16 in the spring valve plate device applies continuous pressure to the first valve plate 18, making it fit tightly against the first connecting shaft 19 and the second connecting shaft 20, and keeping both spring valve plate devices in the open state.

[0042] When emergency separation is required, such as in the event of an accident causing excessive tension on the pipeline, the pull-out bolt 6 will automatically break, allowing the upper housing 1 and lower housing 2 to separate rapidly. At this time, the first connecting shaft 19 and the second connecting shaft 20 quickly disengage through the first sleeve portion 191 and the protrusion 201, and the two spring valve plate devices respectively seal the flow paths of the upper and lower parts to prevent media leakage. The second inclined edge 181 on the first valve plate 18 cooperates with the first inclined edge 23 on the internal convex plate 10 and the internal concave plate 11 to ensure that the valve can close immediately upon separation. At the same time, the galvanized layer improves the corrosion resistance of the first valve plate 18, while the anti-leakage gasket 182 in the mounting groove provides additional sealing protection.

[0043] During reassembly, simply align the upper housing 1 and lower housing 2 and secure them with new pull-out bolts 6. The first connecting shaft 19 and the second connecting shaft 20 precisely align with the protrusion 201 through the groove inside the first sleeve portion 191, restoring the system to its initial state. The entire process is simple and quick, reducing downtime. Furthermore, due to the excellent design of each component, an ideal sealing effect is achieved after each reassembly, ensuring the safety and reliability of the system.

[0044] In summary, this leak-proof pull valve not only provides excellent sealing performance during normal operation, but also responds quickly and effectively to prevent the leakage of hazardous substances in emergency situations, greatly improving the safety and ease of operation of the equipment.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof pull valve, comprising an upper housing (1), characterized in that: The upper housing (1) has a lower housing (2) at its lower part. The upper housing (1) and the lower housing (2) are connected by a pull-out bolt (6). An internal convex plate (10) is fixedly connected inside the upper housing (1), and an internal concave plate (11) is fixedly connected inside the lower housing (2). The internal convex plate (10) and the internal concave plate (11) are engaged. Both the internal convex plate (10) and the internal concave plate (11) are provided with a first inclined edge (23). Both the upper housing (1) and the inner concave plate (11) are provided with snap-fit ​​surfaces (24). The upper housing (1) and the lower housing (2) are respectively connected with spring valve plate devices. A first connecting shaft (19) and a second connecting shaft (20) are provided between the two spring valve plate devices. A first sleeve part (191) is provided at the lower part of the first connecting shaft (19). Several protrusions (201) are fixedly connected at the upper part of the second connecting shaft (20). Several grooves are opened inside the first sleeve part (191).

2. The anti-leakage pull valve according to claim 1, characterized in that: The upper housing (1) is provided with a first flange (3), and the lower housing (2) is provided with a second flange (4), and a plastic sleeve (5) is fixedly connected to the second flange (4).

3. The anti-leakage pull valve according to claim 1, characterized in that: One end of the upper housing (1) is fixedly connected to a first connection port (8), and one end of the lower housing (2) is fixedly connected to a second connection port (7). Both the first connection port (8) and the second connection port (7) are provided with internal threads (9).

4. The anti-leakage pull valve according to claim 1, characterized in that: A copper washer (21) is provided between the inner convex disk (10) and the inner concave disk (11), and a rubber washer (22) is provided between the inner convex disk (10) and the inner concave disk (11).

5. A leak-proof pull valve according to claim 1, characterized in that: The spring valve plate device includes a first connecting plate (13), on which a embossed valve spindle (14) is slidably connected and passes through, and a bushing (17) is fitted on the outer side of the embossed valve spindle (14).

6. A leak-proof pull valve according to claim 5, characterized in that: The bushing (17) is fitted with a first spring (16) on its outer side. One end of the first spring (16) is fixedly connected to the spring seat (15), and the other end of the first spring (16) is fixedly connected to the first valve plate (18).

7. A leak-proof pull valve according to claim 6, characterized in that: The upper part of the first valve plate (18) is provided with a first shaft groove for engaging with the embossed valve core shaft (14), and the lower part of the first valve plate (18) is provided with a second shaft groove.

8. A leak-proof pull valve according to claim 7, characterized in that: The upper shell (1) and the lower shell (2) are respectively welded with second connecting plates (12), and the second connecting plates (12) are connected to the first connecting plate (13) by bolts.

9. A leak-proof pull valve according to claim 8, characterized in that: The first valve plate (18) has a second inclined edge (181) on its left and right sides for fitting with the first inclined edge (23), and the first valve plate (18) has a galvanized layer.

10. A leak-proof pull valve according to claim 9, characterized in that: The lower left and lower right sides of the first valve plate (18) are respectively provided with mounting grooves, and anti-leakage gaskets (182) are bonded in the mounting grooves.

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