High-sealing-performance carbon dioxide filling valve

Abstract

The carbon dioxide filling valve comprises a filling valve body, an installation cap is fixedly welded to the bottom end of the filling valve body, a flushing and filling connector is fixedly welded to the side wall of the filling valve body, a flushing and filling opening is formed in the installation cap, a plugging block is fixedly welded to the interior of an inner cavity of the filling valve body, and the plugging block is fixedly welded to the interior of the inner cavity of the filling valve body. A conical sealing block is arranged on the plugging block, a hollow pipe is fixedly connected to the top wall of the conical sealing block, a connecting plate is fixedly welded to the top end of the hollow pipe, a tension spring is fixedly connected to the top wall of the connecting plate, and the top end of the tension spring is fixedly connected to the top wall of an inner cavity of the filling valve body; a pull rod is arranged in the hollow pipe, and the bottom end of the pull rod is fixedly connected to the conical sealing block. The utility model solves the problems that after a tension spring of an existing filling valve is used for a long time, the elasticity is lost, and the generated tension is reduced, so that the sealing performance of the filling valve is easily reduced after the filling valve is used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of injection valves, in particular to a carbon dioxide injection valve with high sealing performance. Background Technique

[0002] With the increasingly serious problems of air pollution and global warming, driven by the dual pressures of emission regulations and energy consumption, traditional refrigerants such as R134a and R1234yf in automotive air conditioners no longer meet the development and use requirements of current automobiles. Most of the existing automotive air conditioners use carbon dioxide as the refrigerant, and the carbon dioxide refrigerant in the automotive air conditioner needs to be injected through an injection valve.

[0003] At present, most of the existing injection valves on the market seal the injection port of the valve body by pulling a conical sealing block through a tension spring arranged in the valve body. This method causes the elastic loss of the tension spring after long-term use, and the generated tension decreases, resulting in the problem that the sealing performance of the injection valve is prone to decrease after long-term use. In view of this, we propose a carbon dioxide injection valve with high sealing performance to solve the above-mentioned problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a carbon dioxide injection valve with high sealing performance to solve the problems mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A carbon dioxide injection valve with high sealing performance, comprising:

[0006] An injection valve body, the bottom end of the injection valve body is fixedly welded with an installation cap, the side wall of the injection valve body is fixedly welded with an injection joint, an injection port is opened on the installation cap, a ventilation port is opened on the injection valve body, a blocking block is fixedly welded in the inner cavity of the injection valve body, a conical sealing block is arranged on the blocking block, a hollow tube is fixedly connected to the top wall of the conical sealing block, a connecting plate is fixedly welded to the top end of the hollow tube, a tension spring is fixedly connected to the top wall of the connecting plate, the top end of the tension spring is fixedly connected to the top wall of the inner cavity of the injection valve body, a pull rod is arranged in the hollow tube, the bottom end of the pull rod is fixedly connected to the conical sealing block, the top end of the pull rod penetrates through the connecting plate and the injection valve body, and a locking block is arranged at the top end of the pull rod.

[0007] Preferably, a groove is opened on the top wall of the inner cavity of the injection valve body, and a rubber sealing ring is fixedly installed in the groove, and the rubber sealing ring is hermetically sleeved on the pull rod.

[0008] Preferably, the top end of the pull rod is provided with threads, and the locking block is threadedly connected to the pull rod through a threaded hole opened.

[0009] Preferably, the injection port is arranged in a conical shape.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] By providing a pull rod and a locking block on the conical sealing block, after the carbon dioxide refrigerant is filled, due to the lack of pressure, the tension spring that has been stretched restores, pulling the conical sealing block to block on the blocking block. Then, the locking block is screwed forward, causing the pull rod to slide upward under the action of the locking block, tightening the conical sealing block, so that the conical sealing block can be locked on the blocking block. This solves the problem that the tension spring of the existing filling valve has elastic loss after long-term use, resulting in a decrease in the generated tension and causing the sealing performance of the filling valve to decrease after long-term use. Moreover, the overall structure is simple and the production cost is low, which is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. 1 is a three-dimensional structural schematic diagram of a high-sealing carbon dioxide filling valve proposed by the present utility model;

[0013] Figure 2 FIG. 2 is a front view of the cross-section of the filling valve body in a high-sealing carbon dioxide filling valve proposed by the present utility model;

[0014] Figure 3 FIG. 3 is a Figure 2 magnified structural diagram at position A in FIG. 2 in a high-sealing carbon dioxide filling valve proposed by the present utility model.

[0015] In the figures: 1, filling valve body; 2, mounting cap; 3, filling joint; 4, filling port; 5, vent port; 6, blocking block; 7, conical sealing block; 8, hollow tube; 9, connecting plate; 10, tension spring; 11, pull rod; 12, locking block; 13, groove; 14, rubber sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figures 1-3 , the present utility model provides a technical solution: a high-sealing carbon dioxide filling valve, including:

[0018] Filling valve body 1, an installation cap 2 is fixedly welded to the bottom end of the filling valve body 1, a filling joint 3 is fixedly welded to the side wall of the filling valve body 1, a filling port 4 is formed on the installation cap 2, a ventilation port 5 is formed on the filling valve body 1, a blocking block 6 is fixedly welded in the inner cavity of the filling valve body 1, a conical sealing block 7 is arranged on the blocking block 6, a hollow tube 8 is fixedly connected to the top wall of the conical sealing block 7, a connecting plate 9 is fixedly welded to the top end of the hollow tube 8, a tension spring 10 is fixedly connected to the top wall of the connecting plate 9, the top end of the tension spring 10 is fixedly connected to the top wall of the inner cavity of the filling valve body 1, a pull rod 11 is arranged in the hollow tube 8, the bottom end of the pull rod 11 is fixedly connected to the conical sealing block 7, the top end of the pull rod 11 penetrates through the connecting plate 9 and the filling valve body 1, and a locking block 12 is arranged at the top end of the pull rod 11.

[0019] A groove 13 is formed on the top wall of the inner cavity of the filling valve body 1, a rubber sealing ring 14 is fixedly installed in the groove 13, and the rubber sealing ring 14 is sealingly sleeved on the pull rod 11. The arranged rubber sealing ring 14 can improve the sealing performance at the connection between the pull rod 11 and the filling valve body 1, and avoid carbon dioxide from easily leaking out at the connection between the pull rod 11 and the filling valve body 1 during filling.

[0020] Threads are formed at the top end of the pull rod 11, and the locking block 12 is threadedly connected to the pull rod 11 through the formed screw hole, which is convenient for the locking block 12 to be detached from the pull rod 11.

[0021] The filling port 4 is arranged in a conical shape. The conically arranged filling port 4 facilitates the opening of the conical sealing block 7 during filling.

[0022] Working principle: When the utility model is in use, when carbon dioxide refrigerant is filled in from the filling joint 3, the filling pressure acts on the conical sealing block 7, squeezing the conical sealing block 7 to move downward, opening the opening of the blocking block 6. During this process, the conical sealing block 7 stretches the tension spring 10 through the hollow tube 8 and the connecting plate 9 to fill the carbon dioxide refrigerant. When the filling is completed, due to the lack of pressure on the conical sealing block 7, the stretched tension spring 10 returns, pulling the conical sealing block 7 to block on the blocking block 6. Then, the locking block 12 is screwed clockwise, so that the pull rod 11 slides upward under the action of the locking block 12, tightening the conical sealing block 7, so that the conical sealing block 7 can be locked on the blocking block 6, solving the problem that the tension spring of the existing filling valve has elastic loss after long-term use, the generated tension decreases, and the sealing performance of the filling valve is prone to decrease after long-term use.

[0023] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0024] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-sealing carbon dioxide filling valve, characterized in that, Comprising: A filling valve body (1), an installation cap (2) is fixedly welded to the bottom end of the filling valve body (1), a filling joint (3) is fixedly welded to the side wall of the filling valve body (1), a filling port (4) is formed in the installation cap (2), a ventilation port (5) is formed in the filling valve body (1), a blocking block (6) is fixedly welded in the inner cavity of the filling valve body (1), a conical sealing block (7) is arranged on the blocking block (6), a hollow tube (8) is fixedly connected to the top wall of the conical sealing block (7), a connecting plate (9) is fixedly welded to the top end of the hollow tube (8), a tension spring (10) is fixedly connected to the top wall of the connecting plate (9), the top end of the tension spring (10) is fixedly connected to the top wall of the inner cavity of the filling valve body (1), a pull rod (11) is arranged in the hollow tube (8), the bottom end of the pull rod (11) is fixedly connected to the conical sealing block (7), the top end of the pull rod (11) penetrates through the connecting plate (9) and the filling valve body (1), and a locking block (12) is arranged at the top end of the pull rod (11).

2. The high-sealing carbon dioxide filling valve according to claim 1, characterized in that: A groove (13) is formed in the top wall of the inner cavity of the filling valve body (1), a rubber sealing ring (14) is fixedly installed in the groove (13), and the rubber sealing ring (14) is hermetically sleeved on the pull rod (11).

3. The high-sealing carbon dioxide filling valve according to claim 1, characterized in that: Threads are formed at the top end of the pull rod (11), and the locking block (12) is threadedly connected to the pull rod (11) through a formed screw hole.

4. A highly-sealed carbon dioxide filling valve according to claim 1, characterized in that: The filling port (4) is arranged in a conical shape.

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