Low-temperature-resistant fluid micrometering valve

Abstract

The utility model discloses a low-temperature-resistant fluid micrometering valve which comprises a valve seat, a valve needle, a transition sleeve and an adjusting ring. One end of the transition sleeve is fixedly connected with the valve seat, and the other end is rotatably connected with the adjusting ring; the adjusting ring is fixedly connected with the valve needle; an adjusting flow channel is formed in the valve seat, the valve needle comprises a main body and a conical rod, and the conical rod is formed at one end of the valve needle; through rotation of the adjusting ring, the conical rod can be driven to move relative to the adjusting flow channel. The low-temperature fine adjustment device is simple and reliable in structure, liquid media and gas media can be conveyed, cost is greatly saved, pipelines are simplified, space is saved, and the industry blank of the low-temperature to-100 DEG C fine adjustment device is filled. The clamping sleeve assembly type connection design is adopted, installation is easy, the sealing effect is good, and the structure is simple and easy to detach.

Description

Technical Field

[0001] The utility model relates to the low temperature field, in particular to a low temperature resistant fluid fine-tuning valve. Background Art

[0002] The purpose of a fluid fine-tuning device is to slow down and reduce the pressure of gas or liquid flowing through a pipeline. This is to prevent the fluid from flowing too quickly and causing a sudden increase in pressure. Without a fine-tuning device, the flow rate of the fluid cannot be controlled, making some processes and procedures impossible.

[0003] The sealing rings of existing fine-tuning devices are all made of rubber, and the maximum working temperature is -30℃. If the temperature drops above -30℃, the fine-tuning device will leak air or liquid, and cannot be used in harsh low-temperature environments.

[0004] The existing sealing connection between the valve body and the valve needle uses a non-metallic transition material. This structure cannot be used for long-term low-temperature operation because the thermal expansion coefficient of the non-metallic transition material is much greater than that of the metal valve needle. When the fine-tuning mechanism is exposed to low temperatures, the transition non-metallic material will shrink and lock the valve needle, blocking the mechanism passage. At low temperatures, the fine-tuning mechanism cannot use a mixture of gas and liquid media, as mixed use can easily cause blockage. Utility Model Content

[0005] In order to alleviate or solve at least one aspect or at least one point of the above problems, the present utility model is proposed.

[0006] In view of the above-mentioned deficiencies in the prior art, a fluid fine-tuning valve that can be used for a long time at low temperatures is provided, which is stable, reliable and easy to install.

[0007] The utility model provides a low-temperature resistant fluid fine-tuning valve, comprising: a valve seat, a valve needle, a transition sleeve, and an adjusting ring; one end of the transition sleeve is fixedly connected to the valve seat, and the other end is connected to the adjusting ring for relative rotation; the adjusting ring is fixedly connected to the valve needle; the valve seat is formed with an adjusting flow channel, the valve needle comprises a main body and a tapered rod, and the tapered rod is formed at one end of the valve needle; at least a part of the tapered rod is located in the adjusting flow channel; the rotation of the adjusting ring can drive the tapered rod to move relative to the adjusting flow channel.

[0008] Preferably, the valve seat is further provided with a first valve groove for accommodating the main body, and the first valve groove is communicated with the regulating flow channel.

[0009] Preferably, the valve seat is further provided with a second valve groove connected to the first valve groove, and a sealing ring is installed in the second valve groove.

[0010] Preferably, the transition sleeve is provided with an extrusion groove, in which a pressure ring is installed, one end of the pressure ring abuts against the transition sleeve, and the other end abuts against the sealing ring.

[0011] Preferably, the outer surface of the tapered rod is formed into a cone shape, and the inner surface of the regulating flow channel is formed into a cylindrical shape.

[0012] Preferably, a notch is formed at one end of the regulating channel close to the valve needle.

[0013] Preferably, the sealing ring is made of PEEK as raw material, and the main body is made of metal material, and a rotatable seal is formed between the two.

[0014] Preferably, it further comprises a scale ring, the inner circumference of the scale ring is fixed to the outer surface of the transition sleeve, and the outer circumference of the scale ring is rotatably connected to the adjustment ring.

[0015] Preferably, the conical rod and the valve seat forming the regulating flow channel are both made of metal, and when the conical rod closes the regulating flow channel, a hard seal is formed between the two.

[0016] Preferably, the valve needle moves 0.2-1 mm when the adjusting ring is rotated one circle.

[0017] This utility model has a simple and reliable structure. It can transport both liquid and gaseous media, greatly saving costs while simplifying piping and saving space. It fills the industry gap in low-temperature fine-tuning devices down to -100°C. The ferrule assembly connection design is easy to install, has a good sealing effect, and is simple and easy to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a low-temperature fine-tuning valve according to an exemplary embodiment of the present utility model.

[0019] Figure 2 It is a schematic front view of a low-temperature fine-tuning valve according to an exemplary embodiment of the present invention.

[0020] Figure 3 It is a side view schematic diagram of a low-temperature fine-tuning valve according to an exemplary embodiment of the present invention.

[0021] Figure 4 It is a schematic top view of a low-temperature fine-tuning valve according to an exemplary embodiment of the present invention.

[0022] Figure 5 for Figure 4 AA sectional view schematic diagram.

[0023] Figure 6 for Figure 5 An enlarged schematic diagram of point I.

[0024] Figure 7 for Figure 6 Enlarged schematic diagram of II.

[0025] Among them: 1-valve seat, 2-valve needle, 3-adjusting ring, 4-scale ring, 5-first flow channel, 6-second flow channel, 7-pressure ring, 8-sealing ring, 9-transition sleeve, 10-cone rod, 11-adjusting flow channel, 12-incision, 13-first joint, 14-second joint, 15-first clamping part, 16-second clamping part, 17-handle sleeve. DETAILED DESCRIPTION

[0026] The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall concept of the present invention and should not be understood as limiting the present invention. In the present invention, the same reference numerals represent the same or similar components.

[0027] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided to illustrate only some of the many possible ways to implement the methods, devices, and / or systems described herein, which will become clear after understanding the disclosure of the present invention.

[0028] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or sections, these members, components, regions, layers, or sections should not be limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer, or section from another member, component, region, layer, or section.

[0029] In the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” or “coupled to” another element, the element may be directly “on,” “connected to,” or “coupled to” the other element, or one or more other elements may be present therebetween. Conversely, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there may be no other elements present therebetween.

[0030] The terms used herein are only used to describe various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" indicate the presence of the recited features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0031] To enable those skilled in the art to use the contents of the present invention, the following exemplary embodiments may be provided in conjunction with specific application scenarios, specific system, device and component parameters, and specific connection methods. However, for those skilled in the art, these embodiments are only examples, and the general principles defined herein may be applied to other embodiments and application scenarios without departing from the spirit and scope of the present invention.

[0032] According to an exemplary embodiment of the present invention: Figure 1-7 As shown, a cryogenically resistant fine-tuning valve for fluids includes a valve seat 1, a valve needle 2, a transition sleeve 9, and an adjustment ring 3. The transition sleeve 9 is fixedly connected to the valve seat 1 at one end and rotatably connected to the adjustment ring 3 at the other end. The adjustment ring 3 is fixedly connected to the valve needle 2. The valve seat 1 defines an adjustment channel 11. The valve needle 2 includes a main body and a tapered rod 10, which is formed at one end of the valve needle 2. At least a portion of the tapered rod 10 is located within the adjustment channel 5. Rotation of the adjustment ring 3 drives the tapered rod 10 to move relative to the adjustment channel 11.

[0033] like Figure 5 As shown, the valve seat 1 is also provided with a first valve groove for accommodating the valve body, and the first valve groove is connected to the regulating flow channel 11. The valve seat 1 is also provided with a second valve groove connected to the first valve groove, and a sealing ring 8 is installed in the second valve groove. The transition sleeve 9 is provided with an extrusion groove, and a pressure ring 7 is installed in the extrusion groove. One end of the pressure ring 7 abuts on the transition sleeve 9, and the other end abuts on the sealing ring 8. Figure 5 As shown, the fluid sealing group includes a valve seat 1 and a transition sleeve 9. The transition sleeve 9 is threadedly connected to press the sealing ring into the second valve groove of the valve seat 1. After the sealing ring is pressed, it can seal the medium in the valve body.

[0034] like Figure 5 As shown, the outer surface of the cone rod 10 is formed into a cone, and the inner surface of the regulating channel 11 is formed into a cylindrical shape. A cone transition section is formed between the valve body and the cone rod 10. The cone rod 10 is installed inside the regulating channel 11, and the regulation is achieved through the relative movement between the two. Figure 5 As shown, the valve needle 2 and valve seat 1 can optionally be sealed using a metal-to-metal hard seal. Alternatively, the valve body can be made of 316L stainless steel, and the valve needle 2 can be made of Stellite carbide. These two different materials prevent adhesion, and the thermal expansion coefficient of Stellite is slightly lower than that of 316L stainless steel. Therefore, the valve body and valve needle 2 will not lock at low temperatures.

[0035] like Figure 5 As shown, a notch 12 is formed at one end of the regulating flow channel 11 close to the valve needle 2, wherein the notch 12 can be a tapered notch 12 to further prevent the valve needle 2 and the valve seat 1 from locking.

[0036] like Figure 5 As shown, the valve seat 1 defines a first flow channel 5 and a second flow channel 6. A first connector 13 and a second connector 14 are in communication with the first flow channel 5 and the second flow channel 6, respectively. The first connector 13 and the second connector 14 can be connected to an inlet pipe and an outlet pipe (not shown), respectively, and schematically, can be connected to the inlet pipe and the outlet pipe via a first clamping member 15 and a second clamping member 16. The first clamping member 15 and the second clamping member 16 primarily serve a sealing function, and existing seals can be used, so they are not further described here.

[0037] like Figure 1 , as shown in Figure 5, it also includes a scale ring 4, the inner circumference of the scale ring 4 is fixed to the outer surface of the transition sleeve 9, and the outer circumference of the scale ring 4 is rotatably connected to the adjustment ring 3. The adjustment ring 3 is fixedly connected to the valve needle 2 through the handle sleeve 17. The utility model is fine-tuning. Schematically, the valve needle 2 moves 0.2-1mm when the adjustment ring 3 is rotated one circle. Optionally, the valve seat 1 is fixedly connected to the transition sleeve 9 through a thread. The transition sleeve 9 is connected to the valve needle 2 through a top screw or a thread. Of course, there is no need for the two to contact each other, and a gap is formed between them. The adjustment ring 3 is connected to the circumferential scale handle through a top screw or a thread. Rotating the circumferential scale handle allows the valve needle 2 to achieve telescopic movement. The valve needle 2 moves a distance of 0.02mm for each small grid rotation of the circumferential scale handle. The transition sleeve 9 is connected to the strip scale ring 4 through a top screw. Rotating the circumferential scale handle one circle causes the strip scale ring 4 to move one small grid, a distance of 0.5mm.

[0038] like Figure 1-7 As shown, during specific use of the present invention, by rotating the adjustment ring 3, the adjustment ring 3 drives the handle sleeve 17, which in turn drives the valve needle 2 to rotate and move. The adjustment ring 3 and the scale ring 4 are threaded together, allowing the adjustment ring 3 to rotate and move forward and backward relative to the scale ring 4. The tapered rod 10 moves along with the valve needle 2 relative to the adjustment channel 11. The tapered rod 10 has a conical outer surface, while the inner surface of the adjustment channel 11 is cylindrical. The cooperation of these inner and outer surfaces enables fine-tuning. Furthermore, the tapered rod 10 and the adjustment channel 11 can both be made of metal, thus forming a hard seal therebetween. The sealing ring 8 also seals the valve body when it is open.

[0039] This utility model features a fluid fine-tuning valve capable of operating in low-temperature environments, suitable for fluid media such as liquid carbon dioxide, liquid nitrogen, and antifreeze. The sealing ring is made of PEEK and is suitable for fine-tuning the flow rate of gases and liquids at temperatures between -100°C and 260°C. The flow rate can be adjusted within a range of 0-2000 scfh, and the device can withstand a maximum pressure of 30 MPa.

[0040] Compared with existing technologies, this utility model has the following advantages: advanced design principles, simple and reliable structure, and the ability to transport both liquid and gaseous media, significantly reducing costs while simplifying piping and saving space. It fills the industry gap in low-temperature fine-tuning devices down to -100°C. The ferrule-type connection design allows for easy installation and excellent sealing, while the structure is simple and easy to disassemble.

[0041] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to the embodiments and combinations of elements 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 low-temperature resistant fluid fine-tuning valve, characterized by: include: Valve seat, valve needle, transition sleeve, adjusting ring; One end of the transition sleeve is fixedly connected to the valve seat, and the other end is rotatably connected to the adjusting ring; The adjusting ring is fixedly connected to the valve needle; The valve seat is formed with a regulating flow channel, and the valve needle includes a main body and a tapered rod, the tapered rod being formed at one end of the valve needle; at least a portion of the tapered rod is located in the regulating flow channel; By rotating the adjusting ring, the cone rod can be driven to move relative to the adjusting flow channel.

2. The low-temperature resistant fluid fine-tuning valve according to claim 1, characterized in that: The valve seat is further provided with a first valve groove for accommodating the main body, and the first valve groove is communicated with the regulating flow channel.

3. The low-temperature resistant fluid fine-tuning valve according to claim 2, characterized in that: The valve seat is further provided with a second valve groove connected to the first valve groove, and a sealing ring is installed in the second valve groove.

4. The low-temperature resistant fluid fine-tuning valve according to claim 3, characterized in that: The transition sleeve is provided with an extrusion groove, in which a pressure ring is installed. One end of the pressure ring abuts against the transition sleeve, and the other end abuts against the sealing ring.

5. The low-temperature resistant fluid fine-tuning valve according to claim 3, characterized in that: The outer surface of the tapered rod is formed in a tapered shape, and the inner surface of the regulating flow channel is formed in a cylindrical shape.

6. The low-temperature resistant fluid fine-tuning valve according to claim 3, characterized in that: A notch is formed at one end of the regulating flow passage close to the valve needle.

7. The low-temperature resistant fluid fine-tuning valve according to claim 3, characterized in that: The sealing ring is made of PEEK as raw material and the main body is made of metal material, forming a rotatable seal between the two.

8. The low-temperature resistant fluid fine-tuning valve according to claim 1, characterized in that: It also includes a scale ring, the inner circumference of the scale ring is fixed on the outer surface of the transition sleeve, and the outer circumference of the scale ring is rotatably connected to the adjustment ring.

9. The low-temperature resistant fluid fine-tuning valve according to claim 1, characterized in that: The parts of the conical rod and the valve seat that form the regulating flow channel are both made of metal. When the conical rod closes the regulating flow channel, a hard seal is formed between the two.

10. The low-temperature resistant fluid fine-adjusting valve according to any one of claims 1 to 9, characterized in that: When the adjusting ring is rotated one circle, the valve needle moves 0.2-1mm.

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