A needle valve assembly

Abstract

The present application discloses a needle valve group, comprising: a valve body, the valve body having a plurality of cavities, the plurality of cavities being connected; at least one throttle rod, the throttle rod being adjustably mounted on the valve body, the throttle rod being used to adjust the on-off of the plurality of cavities; and a plurality of needle valves, the plurality of needle valves being mounted on the plurality of cavities of the valve body to control the on-off of the plurality of cavities; this needle valve group eliminates the need for assembling a plurality of parts, greatly saves space for the final assembly, makes the appearance compact, and appears clean, beautiful, and unburdened when assembled to the main valve of the hydraulic valve.

Description

Technical Field

[0001] The invention relates to the technical field of piping for hydraulic control valves, in particular to a needle valve group. Background Art

[0002] The needle valve is a fine-tuning valve, which is mainly used to adjust the air flow. The fine-tuning valve requires the valve opening to gradually increase, and can be adjusted continuously and finely from closed to open to the maximum.

[0003] Currently, the needle valves and pipes on the market are assembled by piecing together many small parts. Figure 1 The feature names corresponding to the numbers in the figure are: 111-needle valve, 112-throttle, 113-elbow, 114-connector, 115-straight pipe connection, 116-elbow pipe connection, 117-tee, 118 straight pipe, 119-long joint. There is no difficulty in structure, but there are the following problems in assembly:

[0004] After installation, it contains many small parts, including at least 2 needle valves, 1 throttle, multiple elbows, multiple joints, multiple straight pipe connections, multiple elbow connections, tees, straight pipes and other parts, but they take up a large space after assembly;

[0005] In addition, during the installation process, multiple small parts need to be assembled together, and raw tape or glue needs to be wrapped for sealing during assembly. Raw tape can easily get into the pipe and cause blockage, and glue will also solidify and remain in the pipe, and it is not easy to find;

[0006] After the combination of multiple small parts, there are requirements for the orientation of needle valves, elbows, pipe joints and other parts. In terms of installation, it is difficult to achieve, and operators need to configure multiple times to find a suitable installation space, which wastes manpower;

[0007] The combination of multiple small parts has a relatively high failure rate, and operators often need to disassemble and reassemble it, which consumes a lot of manpower and working hours.

[0008] As a result, the needle valves currently on the market have a high maintenance cost. Once maintenance is required, operators are required to carry various small parts to the installation site. The workload of disassembly and reinstallation is too large, and it is difficult and inconvenient to implement maintenance on site. In addition, multiple small parts have high matching requirements and cannot be assembled in the factory first, which brings great difficulties to on-site installation. Summary of the invention

[0009] One advantage of the present invention is to provide a needle valve assembly, comprising:

[0010] A valve body, the valve body having a plurality of cavities, the plurality of cavities being connected;

[0011] at least one throttle rod, the throttle rod being adjustably mounted on the valve body, the throttle rod being used to adjust the on and off of the plurality of cavities; and

[0012] A plurality of needle valves are installed in the plurality of cavities of the valve body to control the on and off of the plurality of cavities.

[0013] Preferably, the valve body has an inlet and a plurality of outlets, and the inlet and the plurality of outlets are connected to the plurality of cavities.

[0014] Preferably, the valve body has a regulating cavity, a first cavity, a second cavity and a third cavity, wherein the inlet is connected to the regulating cavity, the regulating cavity is connected to the first cavity, and the third cavity is connected to the first cavity and the second cavity.

[0015] Preferably, the throttle rod is adjustably mounted on the valve body, and the throttle rod can adjust the cross-sectional area of ​​the regulating cavity.

[0016] Preferably, the needle valve assembly comprises a plurality of plugs, and the plurality of plugs are detachably mounted on the plurality of cavities.

[0017] Preferably, the needle valve assembly comprises a pre-valve joint, a pilot valve joint and a valve cover joint, and the pre-valve joint, the pilot valve joint and the valve cover joint are all installed in the cavity.

[0018] Preferably, a sealing ring is provided between the front-valve joint and the cavity.

[0019] Preferably, a sealing ring is provided between the pilot valve joint and the cavity.

[0020] Preferably, the sealing ring is an O-ring.

[0021] The present invention has the following advantages over the prior art:

[0022] 1. It eliminates the need to assemble multiple parts, greatly saving the space of the final assembly, making the appearance compact, and when assembled to the main valve of the hydraulic valve, it looks clean, beautiful and unburdened.

[0023] 2. All seals are replaced with O-ring seals, which provide reliable sealing and eliminate the risk of residues of raw tape or glue in the pipeline.

[0024] 3. All external interfaces, such as those connecting the front of the valve, connecting the valve cover, and connecting the pilot valve, are clearly marked and their orientation is consistent with the usage habits when assembling the hydraulic valve.

[0025] 4. The assembly is an integrated module with processed internal flow channels, clear streamlines, clear functions, high reliability and low failure rate.

[0026] 5. The assembly is an integrated module, which does not require additional assembly and greatly reduces labor hours.

[0027] 6. When the assembly needs maintenance, the entire module is directly replaced, which can be easily and quickly operated at the user's site; and the replaced module can be returned to the factory for detailed disassembly and analysis of the cause, and the whole process hardly causes any downtime for the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The schematic diagram of the structure of the existing needle valve group mentioned in the background technology of the present invention is shown.

[0029] Figure 2 A schematic diagram of the three-dimensional structure of the needle valve assembly of the present invention is shown.

[0030] Figure 3 A top view of the needle valve assembly of the present invention is shown.

[0031] Figure 4 The right side view of the needle valve assembly of the present invention is shown.

[0032] Figure 5 The present invention is shown Figure 3 Middle HH section view.

[0033] Figure 6 The present invention is shown Figure 4 EE section view. DETAILED DESCRIPTION

[0034] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0035] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0036] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0037] refer to Figures 2 to 6 The technical solution discloses a needle valve group, including a valve body 1, at least one throttle rod 4 and a plurality of needle valves, the valve body 1 having a plurality of cavities, inlets and outlets, wherein the inlets, outlets and a plurality of cavities are all connected, the throttle rod 4 and the plurality of needle valves are installed in the plurality of cavities, the throttle rod 4 is used to adjust the on-off of the cavity, the plurality of needle valves are respectively installed in the plurality of cavities of the valve body 1, and the plurality of needle valves are used to accurately control the on-off of the plurality of cavities.

[0038] In this embodiment, two needle valves are provided, namely a first needle valve and a second needle valve.

[0039] Specifically, the cavity includes an adjusting cavity, a first cavity 2, a second cavity 3 and a third cavity, wherein a throttle rod 4 is movably mounted on the adjusting cavity, and in this embodiment, the throttle rod 4 is threadedly connected to the adjusting cavity. When the throttle rod 4 rotates clockwise, the cross-sectional area of ​​the adjusting cavity communicating with the first cavity 2 gradually increases; when the throttle rod 4 rotates counterclockwise, the cross-sectional area of ​​the throttle cavity communicating with the first cavity 2 gradually decreases.

[0040] The first needle valve is movably mounted on the first cavity 2, and the second needle valve is movably mounted on the second cavity 3. The first needle valve can accurately control the on-off of the first cavity 2, and the second needle valve can accurately control the on-off of the second cavity 3. The first cavity 2 is arranged in parallel with the second cavity 3, and the third cavity is arranged perpendicular to the first cavity 2 and the second cavity 3, and the third cavity connects the first cavity 2 and the second cavity 3.

[0041] When the throttle lever 4 rotates clockwise, the fluid flows in from the inlet of the valve body 1, enters the regulating cavity, flows into the first cavity 2, and finally flows out of the first cavity 2. When the throttle lever 4 rotates counterclockwise, the fluid flows in from the inlet of the valve body 1, enters the regulating cavity, passes through the first cavity 2, flows into the third cavity, and finally enters the second cavity 3, and flows out of the second cavity 3. In other words, the first needle valve 8 and the second needle valve 10 are opened or closed alternately.

[0042] That is to say, the valve body 1 is provided with a first threaded hole 5 connected with the first cavity 2, and the adjustable throttle rod 4 is threadedly connected with the first threaded hole 5 through the external thread thereon; a front-valve joint 6 is provided with an external thread, and a second threaded hole 7 connected with the first threaded hole 5 is provided on the valve body 1, and the front-valve joint 6 is threadedly connected with the second threaded hole 7 through the external thread thereon; a first needle valve 8 is provided with an external thread, and a third threaded hole 9 connected with the first cavity 2 is provided on the valve body 1, and the first needle valve 8 is threadedly connected with the third threaded hole 9 through the external thread thereon; a third needle valve 8 is provided with an external thread A second needle valve 10, a fourth threaded hole 11 communicating with the second cavity 3 is provided on the valve body 1, and the second needle valve 10 is threadedly connected to the fourth threaded hole 11 via the external thread thereon; a pilot valve connector 12 with an external thread is provided, a fifth threaded hole 13 communicating with the first cavity 2 is provided on the valve body 1, and the pilot valve connector 12 is threadedly connected to the fifth threaded hole 13 via the external thread thereon; a valve cover connector 14 with an external thread is provided, a sixth threaded hole 15 communicating with the second cavity 3 is provided on the valve body 1, and the valve cover connector 14 is threadedly connected to the sixth threaded hole 15 via the external thread thereon.

[0043] Specifically, the throttle rod 4 is threadedly connected to the regulating cavity, the first needle valve 8 is threadedly connected to the first cavity 2 , and the second needle valve 10 is threadedly connected to the second cavity 3 .

[0044] Further, the needle valve assembly includes a pre-valve joint 6, a pilot valve joint and a valve cover joint 14, the pre-valve joint 6 is detachably mounted on the inlet of the valve body 1, the pilot valve joint 12 is detachably mounted on the first cavity 2 or the second cavity 3, and the valve cover joint 14 is detachably mounted on the second cavity 3. In other words, the needle valve assembly also includes a plurality of plugs, which are detachably mounted on the first cavity 2 or the second cavity 3. The operator adjusts the throttle rod 4 so that the fluid flows out of the first cavity 2 or the second cavity 3 as required, and the plug is correspondingly installed in the cavity where the fluid does not need to flow out.

[0045] When the pilot valve receives the induction opening during use and increases until it is larger than the opening of the first needle valve 8, the fluid passes through the front valve joint 6 and the adjustable throttle rod, and then flows through the pilot valve joint 12 into the pilot valve, see the dotted arrow flow direction in the HH section view for details. At this time, the liquid in the valve cover flows through the valve cover joint 14, the first needle valve 8 and the second needle valve 10 and then flows into the pilot valve. At this time, the liquid in the valve cover gradually decreases, and the system regulation makes the hydraulic control valve opening larger.

[0046] It is worth mentioning that the plug is connected to the first cavity or the second cavity by a thread. In this embodiment, multiple plugs are set as a first plug 16 and a second plug 18. It includes a first plug 16 with an external thread, a seventh threaded hole 17 connected to the first cavity 2 is provided on the valve body 1, and the pilot valve joint 12 is threadedly connected to the seventh threaded hole 17 through the external thread thereon. It includes a second plug 18 with an external thread, an eighth threaded hole 19 connected to the second cavity 3 is provided on the valve body 1, and the valve cover joint 14 is threadedly connected to the eighth threaded hole 19 through the external thread thereon. The first plug 16 can be used as a spare interface position for the pilot valve joint 12, and the second plug 18 can be used as a spare interface position for the valve cover joint 14, and a selectable orientation is provided according to the actual use of the user.

[0047] When the opening of the pilot valve decreases until it is smaller than the opening of the second needle valve 10, after the fluid passes through the front-valve joint 6 and the adjustable throttle rod, most of the fluid flows through the first needle valve 8, the second needle valve 10 and the valve cover joint 14 into the valve cover, see the dotted arrow flow direction in the EE section view for details, and a small part flows through the pilot valve joint 12 into the pilot valve. At this time, the liquid in the valve cover gradually increases, and the system regulation makes the hydraulic control valve opening smaller.

[0048] By adjusting the opening of the first needle valve 8, the speed of the liquid flowing out of the valve cover of the hydraulic control valve can be controlled; by adjusting the opening of the second needle valve 10, the speed of the liquid flowing into the valve cover of the hydraulic control valve can be controlled. Both play a key role in the switching speed of the hydraulic control valve.

[0049] The adjustable throttle rod can adjust the flow rate of the liquid in front of the hydraulic control valve entering the needle valve group valve body 1, thereby helping to control the flow rate of the liquid entering the hydraulic control valve valve cover and the speed of the liquid flowing out of the hydraulic control valve valve cover, and can also help control the switching speed of the main valve of the hydraulic control valve.

[0050] The connection between the valve front joint 6, the pilot valve joint 12, the valve cover joint 14 and the valve body 1 is sleeved with a sealing ring. In this embodiment, the sealing ring is an O-ring. This arrangement eliminates the traditional sealing method of raw tape or glue, reduces the risk of residual residue, and can also reduce the failure rate.

[0051] The ends of the adjustable throttle rod 4, the first needle valve 8, the second needle valve 10, the first plug 16 and the second plug 18 are all provided with screwdriver bits interfaces to facilitate installation and removal of the above components.

[0052] In summary, the needle valve group is an integrated module, the internal flow channel is processed, the streamline is clear, the function is clear, the reliability is high, and the failure rate is low. The needle valve group is an integrated module, no additional assembly is required, which greatly reduces the man-hours. And when the needle valve group needs to be repaired, the entire module can be directly replaced, which can be operated simply and quickly at the user's site.

[0053] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A needle valve assembly, characterized in that: include: A valve body, the valve body having a plurality of cavities, the plurality of cavities being connected; At least one throttle rod, the throttle rod is adjustably mounted on the valve body, and the throttle rod is used to adjust the opening and closing of the plurality of cavities; A plurality of needle valves, wherein the plurality of needle valves are installed in the plurality of cavities of the valve body to control the on and off of the plurality of cavities; The valve body has an inlet and a plurality of outlets, and the inlet and the plurality of outlets are connected to the plurality of cavities; The valve body has a regulating cavity, a first cavity, a second cavity and a third cavity, wherein the inlet is connected to the regulating cavity, the regulating cavity is connected to the first cavity, and the third cavity is connected to the first cavity and the second cavity; The throttle rod is adjustably mounted on the valve body, and the throttle rod can adjust the cross-sectional area of ​​the regulating cavity; The needle valve assembly includes a plurality of plugs, and the plurality of plugs are detachably mounted on the plurality of cavities; and The needle valve assembly comprises a pre-valve joint, a pilot valve joint and a valve cover joint, and the pre-valve joint, the pilot valve joint and the valve cover joint are all installed in the cavity.

2. The needle valve assembly according to claim 1, characterized in that: A sealing ring is arranged between the front-valve joint and the cavity.

3. The needle valve assembly according to claim 1, characterized in that: A sealing ring is arranged between the pilot valve joint and the cavity.

4. The needle valve assembly according to claim 2 or 3, characterized in that: The sealing ring is an O-type sealing ring.

Images