Low-temperature self-operated pressure regulating valve

Abstract

The utility model discloses a low-temperature self-operated pressure regulating valve which comprises a valve body, a valve seat installed in the valve body, an actuator installed on the valve body, a valve rod connected with the actuator, and a valve element installed at one end of the valve rod, wherein one end of the valve rod is located in the valve body. The valve is characterized by further comprising a throttling buffer structure arranged on the valve element, the throttling buffer structure comprises a plurality of conical holes formed in the valve element, and the hole diameters of the conical holes are gradually increased from bottom to top. The throttling and buffering structure is used for throttling and buffering media, large fluctuation of media behind the valve caused by large fluctuation of the media in front of the valve is avoided, and meanwhile the flow speed, impact and noise of the media can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to low temperature self -force type pressure regulating valve, specifically is a kind of low temperature self -force type pressure regulating valve. BACKGROUND

[0002] Low temperature self -force type pressure regulating valve is a kind of device suitable for low temperature fluid to adjust pressure, self -force means that it does not need external power source, rely on medium's pressure or temperature to drive regulating mechanism, for example spring or diaphragm etc.

[0003] And the existing low temperature self -force type pressure regulating valve is fluctuated greatly when using due to valve front medium pressure, and it also can cause valve core to frequently act due to the frequent change of valve rear pressure, and medium can also impact valve core, and the impact of medium can also produce larger noise;

[0004] And due to medium is low temperature medium, ice crystal is easily generated in use process, especially the contact of valve core and valve seat, if ice crystal is generated, then it can influence the normal action of valve core, and cause valve core to be difficult to automatically adjust the position of valve core according to valve rear pressure. SUMMARY

[0005] The utility model discloses a kind of low temperature self -force type pressure regulating valves to solve the above problems.

[0006] To achieve the above purpose, the utility model provides the following technical scheme a kind of low temperature self -force type pressure regulating valve, including valve body, the valve seat of rotation in valve body, the actuator of installation on valve body, with the valve stem of the actuator connection and one end in valve body, and the valve core of installation on one end of valve stem;It is characterized by further including throttling buffer structure being arranged on valve core, the throttling buffer structure includes the several taper holes being arranged on valve core, the taper hole's hole diameter gradually increases from below.

[0007] Further preferably, the valve seat is provided with a matching groove, and the valve core is provided with a matching end matched with the matching groove, and the several taper holes are arranged on the matching end.

[0008] Further preferably, the valve core further includes an extension end penetrating through the valve seat, and the extension end is provided with several through grooves.

[0009] Further preferably, it further includes a self-cleaning edge arranged on the valve seat and used for scraping the surface of the valve core during opening and closing of the valve core.

[0010] Further preferably, the self-cleaning edge is obliquely arranged, and the edge is in contact with the valve core.

[0011] Further preferably, the self-cleaning edge is arranged at the upper end and the lower end of the valve seat.

[0012] The utility model discloses the beneficial effect has: through the setting of throttling buffer structure, be used for the throttling buffer effect of medium, avoid because valve before medium fluctuation is big and lead to valve after medium produces bigger fluctuation, still can reduce the flow rate, impact and noise of medium through the setting of throttling buffer structure,

[0013] Through setting self-cleaning edge at the upper end and the lower end of valve seat, and the edge of self-cleaning edge is attached to the valve core, thereby automatically scraping the valve core in the opening and closing process or up and down movement of valve core, avoid the ice crystal produced because of low temperature and influence the action of valve core. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the structure schematic diagram of the utility model;

[0015] Fig. 2 It is the local structure schematic diagram of the utility model;

[0016] Fig. 3 It is the local structure schematic diagram of the valve core in the utility model.

[0017] Legend: 1, valve body;2, valve seat;21, matching groove;3, actuator;4, valve rod;5, valve core;51, conical hole;52, matching end;53, extension end;54, through slot;6, self-cleaning edge. DETAILED DESCRIPTION

[0018] Below, we combine the drawings to the low temperature self -force formula pressure regulating valve of the utility model described do further's explanation.

[0019] It needs to be explained that, all directionality indications such as upper, lower, left, right, front, back in the embodiment of the utility model only are used to explain the relative position relationship, movement condition etc. between each component in a certain specific posture, such as shown in the drawing, if the specific posture changes, then the directionality indication also changes accordingly.

[0020] In the utility model, unless another explicit provision and limitation, the terms "connect", "fix" etc. should be understood broadly;For example, "fixed" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, unless another explicit limitation. For ordinary skilled in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0021] Reference Figs. 1-3As shown in the figure, the low-temperature self-operated pressure regulating valve comprises a valve body 1, a valve seat 2 arranged in the valve body 1, an actuator 3 arranged on the valve body 1, a valve rod 4 connected with the actuator 3 and having one end arranged in the valve body 1, and a valve core 5 arranged at one end of the valve rod 4; characterized in that it further comprises a throttling buffer structure arranged on the valve core 5, wherein the throttling buffer structure comprises a plurality of tapered holes 51 arranged on the valve core 5, and the hole diameter of the tapered holes 51 gradually increases from bottom to top; and the actuator 3 is a self-operated actuator.

[0022] The throttling buffer structure is arranged to play a throttling buffer role on the medium, so that the large fluctuation of the medium before the valve can be avoided to cause large fluctuation of the medium after the valve, and meanwhile, the throttling buffer structure can also reduce the flow rate, impact and noise of the medium.

[0023] The tapered holes 51 are arranged to make the medium passage gradually increase, so that the flow rate and impact of the medium are effectively reduced.

[0024] In one embodiment, the valve seat 2 is provided with a matching groove 21, the valve core 5 is provided with a matching end 52 matched with the matching groove 21, and the plurality of tapered holes 51 are arranged on the matching end 52; when the matching end 52 is attached to the bottom end of the matching groove 21, the medium flow path is cut off, and when the matching end 52 moves upward, a cavity for the medium to flow through is formed between the matching end 52 and the matching groove 21, so that the medium flows through.

[0025] In one embodiment, the valve core 5 further comprises an extended end 53 penetrating through the valve seat 2, and the extended end 53 is provided with a plurality of through grooves 54; the through grooves 54 are arranged to connect the valve cavity of the valve body 1 with the cavity, so that the medium flows through the through grooves 54, the cavity and the tapered holes.

[0026] In one embodiment, the self-cleaning blade 6 arranged on the valve seat 2 is used to scrape the surface of the valve core 5 during the opening and closing process of the valve core 5; the self-cleaning blade 6 can be welded on the valve seat 2 or fixed on the valve seat 2 by screws;

[0027] The self-cleaning blade 6 is arranged in an inclined manner, and the blade is attached to the valve core 5;

[0028] The self-cleaning blade 6 is arranged at the upper end and the lower end of the valve seat 2;

[0029] The self-cleaning blade 6 is arranged at the upper end and the lower end of the valve seat 2, and the blade of the self-cleaning blade 6 is attached to the valve core 5, so that the valve core 5 is scraped automatically during the opening and closing process or the up and down movement process of the valve core 5, thereby avoiding the influence of ice crystals generated by low temperature on the movement of the valve core 5;

[0030] The self-cleaning blade 6 arranged at the upper end of the valve seat 2 is used to scrape the outer surface of the matching end 52, and the self-cleaning blade 6 arranged at the lower end of the valve seat 2 is used to scrape the outer surface of the extended end 53.

[0031] The scope of protection of the utility model is not limited to the above embodiments and their transformations. The routine modifications and substitutions made by those skilled in the art based on the content of the embodiments all belong to the scope of protection of the utility model.

Claims

1. A cryogenic self-operated pressure regulating valve, comprising a valve body (1), a valve seat (2) mounted within the valve body (1), an actuator (3) mounted on the valve body (1), a valve stem (4) connected to the actuator (3) and having one end located within the valve body (1), and a valve core (5) mounted at one end of the valve stem (4); characterized in that... It also includes a throttling buffer structure disposed on the valve core (5), the throttling buffer structure comprising a plurality of tapered holes (51) disposed on the valve core (5), the diameter of the tapered holes (51) gradually increasing from bottom to top.

2. The low-temperature self-operated pressure regulating valve according to claim 1, characterized in that: The valve seat (2) is provided with a mating groove (21), the valve core (5) is provided with a mating end (52) that is mated with the mating groove (21), and a number of tapered holes (51) are provided on the mating end (52).

3. A low-temperature self-operated pressure regulating valve according to claim 2, characterized in that: The valve core (5) also includes an extension end (53) that passes through the valve seat (2), and the extension end (53) is provided with several through grooves (54).

4. A low-temperature self-operated pressure regulating valve according to claim 3, characterized in that: It also includes a self-cleaning blade (6) provided on the valve seat (2) for scraping the surface of the valve core (5) during the opening and closing of the valve core (5).

5. A low-temperature self-operated pressure regulating valve according to claim 4, characterized in that: The self-cleaning cutting edge (6) is set at an angle and is in contact with the valve core (5).

6. A low-temperature self-operated pressure regulating valve according to claim 5, characterized in that: The self-cleaning cutting edge (6) is located at the upper and lower ends of the valve seat (2).

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