Pressure reducing valve with interface provided with anti-loosening structure

Abstract

The utility model belongs to the technical field of pressure reducing valves, and particularly relates to a pressure reducing valve with an anti-loosening structure at a connector, which comprises a valve body, a pressure gauge is mounted on the surface of the valve body, an adjusting knob is connected to the top of the valve body, connecting pipes are connected to two ends of the valve body, and connecting discs are connected to the outer walls of the connecting pipes. One end of the connecting pipe is in threaded connection with a connecting sleeve, one end of the connecting sleeve is connected with a communicating pipe, the bottom of the connecting disc is connected with a fixing frame, the inner side of the fixing frame is connected with a mounting seat, and a pull rod penetrates through the bottom of the mounting seat. Then the connecting sleeve is used for connecting the communicating pipe and the connecting pipe, at the moment, the pull rod is loosened, the clamping pin can be popped out under the action of the spring and inserted into the clamping groove in the bottom of the connecting sleeve, and therefore the phenomenon that the communicating pipe and the connecting pipe are loosened after being connected can be avoided, and safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure reducing valves, and in particular relates to a pressure reducing valve with an interface having an anti-loosening structure. Background Art

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a desired outlet pressure through regulation and automatically maintains a stable outlet pressure by relying on the energy of the medium itself. From the perspective of fluid mechanics, a pressure reducing valve is a throttling element with variable local resistance. That is, by changing the throttling area, the flow rate and kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of reducing pressure. The working principle of the pressure reducing valve is to reduce the water pressure by relying on the local resistance of the flow channel within the valve to the water flow. The range of water pressure drop is automatically adjusted by the inlet and outlet water pressure difference on both sides of the membrane connecting the valve disc or piston. Specifically, when the fluid passes through the pressure reducing valve, the opening and closing components within the valve (such as the valve disc, piston, etc.) will change the throttling area of ​​the fluid, thereby changing the flow rate and kinetic energy, causing pressure loss, achieving the effect of reducing pressure. At the same time, through the adjustment of the control and regulation system, the fluctuation of the pressure after the valve is balanced with the spring force, so that the pressure after the valve is kept constant within a certain error range.

[0003] At present, during the use of existing pressure reducing valves, pipes are usually connected by threaded connection. However, after long-term use, the pipe threaded connection of the pressure reducing valve may become loose. If it is not tightened in time, leakage is likely to occur, thereby reducing safety. Utility Model Content

[0004] The purpose of the utility model is to provide a pressure reducing valve with an anti-loosening structure on its interface, aiming to solve the problem that the existing pressure reducing valves are usually connected to the pipeline by means of threaded connection during use, but after long-term use, the pipeline threaded connection of the pressure reducing valve may become loose. If it is not tightened in time, leakage is likely to occur, thereby reducing safety.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a pressure reducing valve having an interface with an anti-loosening structure, comprising a valve body, a pressure gauge mounted on the surface of the valve body, an adjusting knob connected to the top of the valve body, connecting pipes connected to both ends of the valve body, and a connecting plate connected to the outer wall of the connecting pipe;

[0006] One end of the connecting pipe is threadedly connected to a connecting sleeve, one end of the connecting sleeve is connected to a communicating pipe, the bottom of the connecting disk is connected to a fixing bracket, the inner side of the fixing bracket is connected to a mounting seat, a pull rod passes through the bottom of the mounting seat, one end of the pull rod is connected to a limiting block, one end of the limiting block is connected to a bayonet pin, a spring is sleeved on the outer wall of the pull rod, and a slot is provided at the bottom of the connecting sleeve.

[0007] As a preferred pressure reducing valve with an anti-loosening structure for the interface of the utility model, the end of the pull rod away from the limit block is annular.

[0008] As a preferred pressure reducing valve of the utility model with an interface having an anti-loosening structure, the size of the card slot is adapted to the size of one end of the card pin.

[0009] As a preferred pressure reducing valve of the utility model with an interface having an anti-loosening structure, the bayonet pin can form an elastic structure with the mounting seat through a limit block and a spring.

[0010] As a preferred pressure reducing valve of the utility model whose interface has an anti-loosening structure, one end of the connecting disk is connected to a ring-shaped fixing block.

[0011] As a preferred embodiment of the pressure reducing valve of the utility model whose interface has an anti-loosening structure, an annular groove is provided on the inner wall of the annular fixing block.

[0012] As a preferred embodiment of the pressure reducing valve of the utility model whose interface has an anti-loosening structure, a sealing ring is provided on the inner side of the annular groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] By pulling the pull rod, the limit block drives the bayonet pin to retract, and then the connecting sleeve is used to connect the connecting pipe and the connecting pipe. At this time, the pull rod is released, and the bayonet pin will pop out and be inserted into the slot at the bottom of the connecting sleeve under the action of the spring, thereby preventing the connecting pipe and the connecting pipe from loosening after connection, thereby improving safety.

[0015] Through the arrangement of the annular fixing block, annular groove and sealing ring, when the connecting sleeve is threadedly connected to the connecting pipe, one end of the connecting sleeve will enter the inner side of the annular fixing block. At this time, the sealing ring in the annular groove will be sleeved on the outer wall of the connecting sleeve, thereby improving the sealing effect of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main disassembled cross-sectional structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the connecting pipe structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the A-enlarged structure of the present utility model.

[0021] In the figure: 1. Valve body; 2. Pressure gauge; 3. Adjusting knob; 4. Connecting pipe; 5. Connecting plate; 6. Connecting sleeve; 7. Connecting pipe; 8. Fixing bracket; 9. Mounting seat; 10. Pull rod; 11. Limit block; 12. Bayonet pin; 13. Spring; 14. Slot; 15. Annular fixing block; 16. Annular groove; 17. Sealing ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-4 The utility model provides the following technical solutions: a pressure reducing valve with an anti-loosening structure at its interface, comprising a valve body 1, a pressure gauge 2 mounted on the surface of the valve body 1, an adjusting knob 3 connected to the top of the valve body 1, connecting pipes 4 connected to both ends of the valve body 1, and a connecting plate 5 connected to the outer wall of the connecting pipe 4;

[0024] One end of the connecting pipe 4 is threadedly connected to a connecting sleeve 6, one end of the connecting sleeve 6 is connected to a connecting pipe 7, the bottom of the connecting disc 5 is connected to a fixing frame 8, the inner side of the fixing frame 8 is connected to a mounting seat 9, a pull rod 10 passes through the bottom of the mounting seat 9, one end of the pull rod 10 is connected to a limit block 11, one end of the limit block 11 is connected to a bayonet 12, the outer wall of the pull rod 10 is sleeved with a spring 13, and a card slot 14 is provided at the bottom of the connecting sleeve 6;

[0025] It should be noted that one end of the connecting pipe 4 is provided with an external thread, the interior of the connecting sleeve 6 is provided with an internal thread, and the connecting pipe 7 can form a threaded connection structure with the connecting pipe 4 through the connecting sleeve 6.

[0026] Preferably, the end of the pull rod 10 away from the limit block 11 is annular, the slot 14 is adapted to the size of one end of the bayonet 12 , and the bayonet 12 can form an elastic structure with the mounting seat 9 through the limit block 11 and the spring 13 .

[0027] When in use, the limit block 11 is pulled to drive the bayonet 12 to retract by pulling the pull rod 10, and then the connecting sleeve 6 is used to connect the connecting pipe 7 and the connecting pipe 4. At this time, the pull rod 10 is released, and the bayonet 12 will pop out under the action of the spring 13 and be inserted into the card slot 14 at the bottom of the connecting sleeve 6, thereby preventing the connecting pipe 7 and the connecting pipe 4 from loosening after connection.

[0028] On the contrary, when disassembling the connecting pipe 7, by pulling the pull rod 10, the limit block 11 drives the pin 12 to retract, and at this time one end of the pin 12 will be disengaged from the slot 14, and then the connecting pipe 4 and the connecting pipe 7 can be separated by rotating the connecting sleeve 6 counterclockwise.

[0029] Preferably, one end of the connecting plate 5 is connected to an annular fixing block 15 , an annular groove 16 is formed on the inner wall of the annular fixing block 15 , and a sealing ring 17 is provided on the inner side of the annular groove 16 ;

[0030] It should be noted that the inner ring size of the annular fixing block 15 is adapted to the connecting sleeve 6 .

[0031] During specific use, through the arrangement of the annular fixing block 15, the annular groove 16, and the sealing ring 17, when the connecting sleeve 6 is threadedly connected to the connecting pipe 4, one end of the connecting sleeve 6 will enter the inner side of the annular fixing block 15. At this time, the sealing ring 17 in the annular groove 16 will be sleeved on the outer wall of the connecting sleeve 6, thereby improving the sealing effect of the connection.

[0032] Working principle: First, pull the pull rod 10 to make the limit block 11 drive the bayonet 12 to contract, and then use the connecting sleeve 6 to connect the connecting pipe 7 with the connecting pipe 4. At this time, release the pull rod 10, and the bayonet 12 will pop out under the action of the spring 13 and be inserted into the slot 14 at the bottom of the connecting sleeve 6, thereby preventing the connecting pipe 7 and the connecting pipe 4 from loosening after connection. And through the setting of the annular fixing block 15, the annular groove 16, and the sealing ring 17, when the connecting sleeve 6 is threadedly connected to the connecting pipe 4, one end of the connecting sleeve 6 will enter the inner side of the annular fixing block 15. At this time, the sealing ring 17 in the annular groove 16 will be sleeved on the outer wall of the connecting sleeve 6, thereby improving the sealing effect of the connection.

[0033] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pressure reducing valve having an interface with an anti-loosening structure, comprising a valve body (1), characterized in that: A pressure gauge (2) is installed on the surface of the valve body (1), an adjusting knob (3) is connected to the top of the valve body (1), connecting pipes (4) are connected to both ends of the valve body (1), and a connecting plate (5) is connected to the outer wall of the connecting pipe (4); One end of the connecting tube (4) is threadedly connected to a connecting sleeve (6), one end of the connecting sleeve (6) is connected to a connecting pipe (7), the bottom of the connecting plate (5) is connected to a fixing frame (8), the inner side of the fixing frame (8) is connected to a mounting seat (9), a pull rod (10) passes through the bottom of the mounting seat (9), one end of the pull rod (10) is connected to a limiting block (11), one end of the limiting block (11) is connected to a bayonet (12), the outer wall of the pull rod (10) is sleeved with a spring (13), and a card slot (14) is provided at the bottom of the connecting sleeve (6).

2. The pressure reducing valve with an anti-loosening structure at its interface according to claim 1, characterized in that: One end of the pull rod (10) away from the limiting block (11) is in a circular ring shape.

3. The pressure reducing valve with an anti-loosening structure at its interface according to claim 1, characterized in that: The size of the card slot (14) is adapted to the size of one end of the card pin (12).

4. The pressure reducing valve with an anti-loosening structure at its interface according to claim 1, characterized in that: The latch (12) can form an elastic structure with the mounting seat (9) through the limiting block (11) and the spring (13).

5. The pressure reducing valve with an anti-loosening structure at its interface according to claim 1, characterized in that: One end of the connecting disk (5) is connected to an annular fixing block (15).

6. The pressure reducing valve with an anti-loosening structure at its interface according to claim 5, characterized in that: An annular groove (16) is formed on the inner wall of the annular fixing block (15).

7. The pressure reducing valve having an interface with an anti-loosening structure according to claim 6, characterized in that: A sealing ring (17) is provided on the inner side of the annular groove (16).

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