Pipeline connecting structure for large-throttling-aperture self-sealing high-pressure heater linkage valve

Abstract

The utility model relates to the technical field of interconnecting valves, in particular to a large-throttling-aperture self-sealing pipeline connecting structure for a high-pressure heater interconnecting valve, which comprises a connecting pipe arranged on the side surface of a valve body, a positioning seat arranged on the surface of the connecting pipe, a supporting screw rod arranged in the positioning seat, a positioning plate sleeved on the surface of the supporting screw rod, and a positioning screw pipe arranged at one end of the connecting pipe. A sealing bearing is arranged at one end of the pipeline, a fixing nut is arranged on the surface of the sealing bearing, and a pressing plate is arranged on the inner side face of the fixing nut. The sealing structure has the beneficial effects that firstly, the fixing nut is screwed to the positioning screw pipe, the pressing plate arranged on the inner side face of the fixing nut is used for pressing and sealing the sealing ring, and therefore a pipeline can be fixedly connected with the connecting pipe arranged on the side face of the valve body, and then the positioning plate is used for blocking the side face of the fixing nut; and the problem of looseness of the fixing nut is avoided.

Description

Technical Field

[0001] The utility model relates to the field of cross-flow valves, in particular to a pipeline connection structure for a self-sealing high-pressure cross-flow valve with a large throttle aperture. Background Art

[0002] The high-pressure heater integrated valve is also called the switching three-way valve. There are two types: three-way valve and four-way valve. It is used to close the high-pressure heater water line to protect the boiler water supply in case of failure. Flexible graphite is its filler.

[0003] In the prior art, when the high-pressure joint valve is used to connect with the pipeline, two sets of pipelines are mainly connected by threaded connection in cooperation with sealing gasket equipment for fixed connection and sealing.

[0004] However, after the traditional connection between the pipeline and one end of the high-pressure joint valve is made, the vibration caused by the operation of the high-pressure joint valve for a long time will cause the thread of the pipeline connection to loosen, thereby causing a poor seal problem at the connection between the pipeline and the high-pressure joint valve. For this reason, the utility model proposes a pipeline connection structure for a large throttling aperture self-sealing high-pressure joint valve to solve the above-mentioned technical problems. Utility Model Content

[0005] The utility model aims to provide a pipeline connection structure for a large throttle aperture self-sealing high pressure joint valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pipeline connection structure for a large throttle aperture self-sealing high-pressure joint valve, the pipeline connection structure for a large throttle aperture self-sealing high-pressure joint valve comprising: a valve body, a connecting pipe is arranged on the side of the valve body, a positioning seat is arranged on the surface of the connecting pipe, a supporting screw is arranged in the positioning seat, a positioning plate is sleeved on the surface of the supporting screw, a positioning spiral tube is arranged at one end of the connecting pipe, and a sealing ring is arranged on the end surface of the connecting pipe;

[0007] A pipeline, a sealing bearing is arranged at one end of the pipeline, a fixing nut is arranged on the surface of the sealing bearing, and a pressing plate is arranged on the inner side of the fixing nut.

[0008] Preferably, the surface of the positioning seat is provided with placement grooves, and two groups of placement grooves are provided. The two groups of placement grooves are symmetrically distributed up and down about the connecting pipe, and one end of the support screw is fixedly connected to the surface of the placement groove.

[0009] Preferably, a spring is sleeved on the surface of the support screw, one end of the spring is fixedly connected to the surface of the placement slot, and the positioning plate is an "L"-shaped plate structure, and the positioning plate can slide up and down on the support screw.

[0010] Preferably, a nut is threadedly connected to one end of the support screw, a second spring is arranged at the bottom of the nut, the second spring is sleeved on the support screw, one end of the second spring is fixedly connected to the lower surface of the nut, and the other end of the second spring cooperates with the spring to resist the upper and lower surfaces of the positioning plate.

[0011] Preferably, the sealing ring is fixedly connected to the end surface of the connecting pipe, and the positioning spiral tube is also fixedly connected to the end surface of the connecting pipe.

[0012] Preferably, the sealing bearing is fixedly connected to the end face of the pipe, the fixing nut is fixedly connected to the surface of the sealing bearing, a base plate is provided on the inner side of the fixing nut, a pressing plate is fixedly connected to the surface of the base plate, the pressing plate can press the sealing ring, and the pressing plate has an annular structure.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model discloses a pipeline connection structure for a large throttling aperture self-sealing high-pressure joint-stroke valve. When in use, the fixing nut is firstly screwed on the positioning screw pipe by using the fixing nut, and the sealing ring is pressed and sealed by using the pressing plate arranged on the inner side of the fixing nut, so that the pipeline and the connecting pipe arranged on the side of the valve body can be fixedly connected. Then, the positioning plate is used to block the side of the fixing nut to avoid the problem of loosening of the fixing nut. In this way, the problem of loosening of the thread at the pipeline connection due to vibration caused by the operation of the high-pressure joint-stroke valve after the traditional pipeline is connected to one end of the high-pressure joint-stroke valve for a long time is avoided, thereby causing the problem of poor sealing at the connection between the pipeline and the high-pressure joint-stroke valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a partial cross-sectional view of the structure of the utility model;

[0017] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0018] Figure 4 This is a schematic diagram of the structure of the utility model when the structure is tilted;

[0019] Figure 5 for Figure 4 Enlarged structural diagram at B in the middle.

[0020] In the figure: 1. valve body; 2. connecting pipe; 3. positioning seat; 4. supporting screw; 5. positioning plate; 6. positioning screw tube; 7. sealing ring; 8. pipeline; 9. sealing bearing; 10. fixing nut; 11. pressing plate;

[0021] 12. Placement slot; 13. Spring; 14. Nut; 15. Second spring; 16. Base plate. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] See also Figure 1-Figure 5 The utility model provides a technical solution: a pipeline connection structure for a large throttle aperture self-sealing high-pressure joint valve, the pipeline connection structure for a large throttle aperture self-sealing high-pressure joint valve comprising: a valve body 1, a connecting pipe 2 is arranged on the side of the valve body 1, a positioning seat 3 is arranged on the surface of the connecting pipe 2, a supporting screw 4 is arranged in the positioning seat 3, a positioning plate 5 is sleeved on the surface of the supporting screw 4, a positioning screw 6 is arranged at one end of the connecting pipe 2, and a sealing ring 7 is arranged on the end surface of the connecting pipe 2; a pipeline 8, a sealing bearing 9 is arranged at one end of the pipeline 8, a fixing nut 10 is arranged on the surface of the sealing bearing 9, and a pressing plate 11 is arranged on the inner side of the fixing nut 10;

[0025] When in use, first use the fixing nut 10 to screw onto the positioning screw tube 6, and use the pressing plate 11 set on the inner side of the fixing nut 10 to press and seal the sealing ring 7, so that the pipeline 8 can be fixedly connected to the connecting pipe 2 set on the side of the valve body 1, and then use the positioning plate 5 to block the side of the fixing nut 10 to prevent the fixing nut 10 from loosening.

[0026] Embodiment 2

[0027] On the basis of the first embodiment, in order to improve the sealing performance of the connection between the pipeline 8 and the connecting pipe 2, a sealing ring 7 is provided, the sealing ring 7 is fixedly connected to the end face of the connecting pipe 2, the positioning screw 6 is also fixedly connected to the end face of the connecting pipe 2, the sealing bearing 9 is fixedly connected to the end face of the pipeline 8, the fixing nut 10 is fixedly connected to the surface of the sealing bearing 9, the inner side of the fixing nut 10 is provided with a bottom plate 16, and the pressing plate 11 is fixedly connected to the surface of the bottom plate 16. The pressing plate 11 can press the sealing ring 7, and the pressing plate 11 has an annular structure;

[0028] During use, when it is necessary to connect the pipeline 8 with the connecting pipe 2 on the side of the valve body 1, the fixing nut 10 can be screwed on the positioning screw tube 6 first. When the fixing nut 10 is screwed on the positioning screw tube 6, the pressing plate 11 can press the surface of the sealing ring 7, so that the pressing plate 11 and the connecting pipe 2 are sealed through the sealing ring 7. The setting of the sealing bearing 9 also makes it convenient to rotate the fixing nut 10.

[0029] Embodiment 3

[0030] On the basis of the second embodiment, in order to improve the fixing stability of the fixing nut 10, a positioning plate 5 is provided, a placement groove 12 is opened on the surface of the positioning seat 3, and two groups of placement grooves 12 are provided. The two groups of placement grooves 12 are symmetrically distributed up and down about the connecting pipe 2, one end of the support screw 4 is fixedly connected to the surface of the placement groove 12, and a spring 13 is sleeved on the surface of the support screw 4, and one end of the spring 13 is fixedly connected to the surface of the placement groove 12. The positioning plate 5 has an "L"-shaped plate structure, and the positioning plate 5 can slide up and down on the support screw 4. A nut 14 is screwed on one end of the support screw 4, and a second spring 15 is provided at the bottom of the nut 14. The second spring 15 is sleeved on the support screw 4, and one end of the second spring 15 is fixedly connected to the lower surface of the nut 14, and the other end of the second spring 15 cooperates with the spring 13 to resist the upper and lower surfaces of the positioning plate 5;

[0031] When it is necessary to screw the fixing nut 10 onto the positioning screw tube 6 during use, the positioning plate 5 can be pulled upwards first. Then, when the fixing nut 10 is screwed onto the positioning screw tube 6, the positioning plate 5 can be loosened. With the help of the second spring 15, the positioning plate 5 can be reset so that one end of the positioning plate 5 is against the side of the fixing nut 10 to prevent the fixing nut 10 from loosening. The spring 13 cooperates with the second spring 15 to prevent the positioning plate 5 from being displaced on the support screw 4 at will. The nut 14 can be disengaged from the support screw 4 by rotating the nut 14, so that the positioning plate 5 can be removed from the support screw 4 more conveniently.

[0032] During actual use, firstly, the fixing nut 10 is screwed onto the positioning screw tube 6, and the sealing ring 7 is pressed and sealed by the pressing plate 11 arranged on the inner side of the fixing nut 10, so that the pipeline 8 can be fixedly connected to the connecting pipe 2 arranged on the side of the valve body 1, and then the positioning plate 5 is used to block the side of the fixing nut 10 to prevent the fixing nut 10 from loosening. In this way, the problem of loosening of the thread at the connection of the pipeline 8 due to the vibration caused by the operation of the high-pressure connecting valve after the traditional connection between the pipeline 8 and one end of the high-pressure connecting valve for a long time is avoided, thereby causing the problem of poor sealing at the connection between the pipeline 8 and the high-pressure connecting valve.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipeline connection structure for a large throttle aperture self-sealing high pressure joint valve, characterized in that: The pipeline connection structure for a large throttle aperture self-sealing high-pressure combined-pass valve comprises: a valve body (1), a connecting pipe (2) is arranged on the side of the valve body (1), a positioning seat (3) is arranged on the surface of the connecting pipe (2), a supporting screw (4) is arranged in the positioning seat (3), a positioning plate (5) is sleeved on the surface of the supporting screw (4), a positioning screw (6) is arranged at one end of the connecting pipe (2), and a sealing ring (7) is arranged on the end surface of the connecting pipe (2); A pipeline (8) is provided with a sealing bearing (9) at one end of the pipeline (8), a fixing nut (10) is provided on the surface of the sealing bearing (9), and a pressing plate (11) is provided on the inner side of the fixing nut (10).

2. A pipeline connection structure for a large throttle aperture self-sealing high pressure joint valve according to claim 1, characterized in that: The surface of the positioning seat (3) is provided with a placement groove (12), and two groups of the placement grooves (12) are provided. The two groups of placement grooves (12) are symmetrically distributed up and down with respect to the connecting pipe (2), and one end of the support screw rod (4) is fixedly connected to the surface of the placement groove (12).

3. According to claim 1, a pipeline connection structure for a large throttle aperture self-sealing high pressure joint valve is characterized in that: The surface of the support screw rod (4) is sleeved with a spring (13), one end of the spring (13) is fixedly connected to the surface of the placement groove (12), and the positioning plate (5) is an "L"-shaped plate structure, and the positioning plate (5) can slide up and down on the support screw rod (4).

4. A pipeline connection structure for a large throttle aperture self-sealing high pressure joint valve according to claim 3, characterized in that: A nut (14) is screwed onto one end of the support screw rod (4), a second spring (15) is arranged at the bottom of the nut (14), the second spring (15) is sleeved on the support screw rod (4), one end of the second spring (15) is fixedly connected to the lower surface of the nut (14), and the other end of the second spring (15) cooperates with the spring (13) to abut against the upper surface and the lower surface of the positioning plate (5).

5. The pipeline connection structure for a large throttle aperture self-sealing high pressure joint valve according to claim 1, characterized in that: The sealing ring (7) is fixedly connected to the end surface of the connecting pipe (2), and the positioning spiral tube (6) is also fixedly connected to the end surface of the connecting pipe (2).

6. The pipeline connection structure for a large throttle aperture self-sealing high pressure joint valve according to claim 1, characterized in that: The sealing bearing (9) is fixedly connected to the end surface of the pipe (8), the fixing nut (10) is fixedly connected to the surface of the sealing bearing (9), the inner side of the fixing nut (10) is provided with a bottom plate (16), the pressing plate (11) is fixedly connected to the surface of the bottom plate (16), the pressing plate (11) can press the sealing ring (7), and the pressing plate (11) is an annular structure.

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