A drain needle valve

Abstract

The utility model discloses a kind of discharge needle valves, comprising: needle valve base, the inside of needle valve base is equipped with air inlet channel and air outlet channel, air inlet channel is communicated with air outlet channel;Locking cap, locking cap is threadedly connected on the top outer wall of needle valve base, the top of locking cap has opening;Threaded pressure cap, threaded pressure cap is threadedly connected with the top inner wall of needle valve base;Sealing compression ring, sealing compression ring is arranged between threaded pressure cap and needle valve base;Discharge needle, discharge needle is threadedly connected on threaded pressure cap, the bottom of discharge needle penetrates sealing compression ring, inserts into air outlet channel.The utility model has following beneficial effects: simple overall structure, it is convenient to disassemble and repair;It can reach 0-100ml by micro-flow regulation by relying on the conical surface of the bottom of discharge needle, and precision can reach 0.01ml.After outer cap and locking cap are fixed together by screw, the bottom of outer cap will compress sealing ring, sealing ring will be firmly fixed to base, so that the stability of needle valve can reach more than 5 years.

Description

Technical Field

[0001] The utility model relates to the technical field of needle valves, in particular to a discharge needle valve. Background Art

[0002] A needle valve is a needle-shaped valve with a fine pointed valve stem, and its name originates from the English word "Needle". According to JIS B0100 Glossary of Valve Terms, a needle valve is defined as a valve provided with a needle-shaped valve body and capable of easily adjusting flow rate. Existing needle valves have complex internal structures, making installation, disassembly and maintenance very inconvenient. Summary of the Invention

[0003] According to an embodiment of the present utility model, a discharge needle valve is provided, comprising: a needle valve base, wherein an air inlet channel and an air outlet channel are arranged inside the needle valve base, and the air inlet channel communicates with the air outlet channel; a locking cap, wherein the locking cap is in threaded connection with the top outer wall of the needle valve base, and an opening is formed in the top of the locking cap; a threaded pressing cap, wherein the threaded pressing cap is in threaded connection with the top inner wall of the needle valve base; a sealing pressure ring, wherein the sealing pressure ring is arranged between the threaded pressing cap and the needle valve base; a discharge needle, wherein the discharge needle is in threaded connection with the threaded pressing cap, and the bottom of the discharge needle penetrates through the sealing pressure ring and is inserted into the air outlet channel.

[0004] Further, a conical surface is arranged at the bottom of the discharge needle.

[0005] Further, the discharge needle valve further comprises: a base, wherein the base is located in the locking cap and connected with the discharge needle.

[0006] Further, a screwing slot is arranged at the top of the base.

[0007] Further, the screwing slot is in a straight shape.

[0008] Further, the discharge needle valve further comprises: a limiting edge, wherein the limiting edge is arranged on the inner wall of the locking cap; a sealing ring, wherein the sealing ring is sleeved on the base and located on the limiting edge; an outer cap, wherein the outer cap is inserted into the locking cap and connected with the locking cap, and the outer cap is sleeved on the base and presses the sealing ring.

[0009] Further, the outer cap is fixed to the locking cap by screws.

[0010] Further, the discharge needle valve further comprises: an O-ring, wherein the O-ring is sleeved on the discharge needle and located between the sealing pressure ring and the needle valve base.

[0011] The discharge needle valve according to the embodiment of the present utility model has the following beneficial effects: 1. The overall structure is simple, making it easy to disassemble and repair; 2. Relying on the conical surface at the bottom of the discharge needle, micro-flow adjustment of 0-100ml can be achieved, with an accuracy of 0.01ml.

[0012] 3. After the outer cap and locking cap are fixed together with screws, the bottom of the outer cap will press the sealing ring, which will firmly fix the base, so that the needle valve can be stable for more than 5 years.

[0013] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a discharge needle valve according to an embodiment of the present utility model.

[0015] Figure 2 This is a schematic cross-sectional view of a discharge needle valve according to an embodiment of the present invention. Figure 1 .

[0016] Figure 3 This is a schematic cross-sectional view of a discharge needle valve according to an embodiment of the present invention. Figure 2 . Detailed Implementation

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0018] First, combine Figures 1-3 This invention describes a discharge needle valve according to an embodiment of the present invention, used to regulate the flow rate and pressure of discharged gas, and has a wide range of applications.

[0019] like Figures 1-3 As shown, an embodiment of the present invention provides a discharge needle valve comprising a needle valve base 100, a locking cap 200, a threaded pressure cap 300, a sealing pressure ring 400, and a discharge needle 500.

[0020] Specifically, such as Figures 1-3 As shown, the needle valve base 100 has an air inlet channel 101 and an air outlet channel 102 inside. The air inlet channel 101 and the air outlet channel 102 are connected. Gas enters through the air inlet channel 101 and is discharged through the air outlet channel 102.

[0021] Specifically, such as Figures 1-3 As shown, the locking cap 200 is threaded onto the top outer wall of the needle valve base 100. The top of the locking cap 200 has an opening and uses a threaded connection, which facilitates disassembly and assembly.

[0022] Specifically, such as Figures 2-3 As shown, the threaded cap 300 is threaded to the top inner wall of the needle valve base 100, and the threaded connection method facilitates disassembly and assembly.

[0023] Specifically, such as Figures 2-3 As shown, the sealing ring 400 is positioned between the threaded cap 300 and the needle valve base 100 to ensure a certain sealing performance.

[0024] Specifically, such as Figures 2-3 As shown, the discharge needle 500 is threaded onto the threaded cap 300. The bottom of the discharge needle 500 passes through the sealing ring 400 and is inserted into the air outlet passage 102. The bottom of the discharge needle 500 has a tapered surface 501. By turning the discharge needle 500, the position of the discharge needle 500 on the threaded cap 300 is adjusted, thereby controlling the distance between the tapered surface 501 and the needle valve base 100 to achieve the corresponding flow control.

[0025] Furthermore, such as Figures 2-3 As shown, a discharge needle valve according to an embodiment of the present invention further includes: a base 600, which is located inside the locking cap 200 and connected to the discharge needle 500. The base 600 is connected to the discharge needle 500 via a positioning pin. By turning the base 600, the discharge needle 500 can be rotated on the threaded pressure cap 300, thereby adjusting the height of the discharge needle 500.

[0026] Furthermore, such as Figures 2-3 As shown, the top of the base 600 is provided with a screwing groove 601. The screwing groove 601 is in the shape of an "I" or other shapes, such as cross or Y, so as to facilitate the use of tools such as screwdrivers to screw the base 600.

[0027] Furthermore, such as Figures 2-3 As shown, a discharge needle valve according to an embodiment of this utility model further includes: a limiting edge 701, a sealing ring 702, and an outer cap 703. The limiting edge 701 is disposed on the inner wall of the locking cap 200; the sealing ring 702 is sleeved on the base 600, and the sealing ring 702 is located on the limiting edge 701; the outer cap 703 is inserted into the locking cap 200 and connected to the locking cap 200, and the outer cap 703 is sleeved on the base 600 and presses against the sealing ring 702. The outer cap 703 is fixed to the locking cap 200 by screws. Because the discharge needle valve is not changed after adjustment, after the outer cap 703 is fixed to the locking cap 200 by screws, the bottom of the outer cap 703 will press against the sealing ring 702, and the sealing ring 702 will firmly fix the base 600, so that the stability of the needle valve can reach more than 5 years.

[0028] Furthermore, such as Figures 2-3As shown, a discharge needle valve according to an embodiment of the present invention further includes an O-ring 800, which is sleeved on the discharge needle 500 and located between the sealing pressure ring 400 and the needle valve base 100, thereby further improving the sealing performance and preventing air leakage.

[0029] Above, refer to Figures 1-3 A discharge needle valve according to an embodiment of the present invention is described, which has the following beneficial effects: 1. The overall structure is simple, making it easy to disassemble and repair; 2. By relying on the conical surface 501 at the bottom of the discharge needle 500, micro-flow adjustment of 0-100ml can be achieved, and the accuracy can reach 0.01ml.

[0030] 3. After the outer cap 703 and the locking cap 200 are fixed together with screws, the bottom of the outer cap 703 will press the sealing ring 702, and the sealing ring 702 will firmly fix the base 600, so that the stability of the needle valve can reach more than 5 years.

[0031] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A discharge needle valve, characterized in that, Include: A needle valve base, wherein the interior of the needle valve base is provided with an air inlet channel and an air outlet channel, and the air inlet channel is connected to the air outlet channel; A locking cap, which is threaded onto the top outer wall of the needle valve base, has an opening at the top; A threaded cap is threadedly connected to the top inner wall of the needle valve base; A sealing ring is disposed between the threaded cap and the needle valve base; The discharge needle is threaded onto the threaded cap, and its bottom passes through the sealing ring and is inserted into the air outlet channel.

2. The discharge needle valve as described in claim 1, characterized in that, The bottom of the discharge needle has a conical surface.

3. The discharge needle valve as described in claim 1, characterized in that, It also includes: a base located inside the locking cap, the base being connected to the discharge pin.

4. The discharge needle valve as described in claim 3, characterized in that, The base has a screwing groove on its top.

5. The discharge needle valve as described in claim 4, characterized in that, The twisting groove is in the shape of an "I".

6. The discharge needle valve as described in claim 3, characterized in that, Also includes: A limiting edge is provided on the inner wall of the locking cap; A sealing ring, which is sleeved on the base and located on the limiting edge; An outer cap is inserted into and connected to the locking cap. The outer cap is fitted onto the base and presses against the sealing ring.

7. The discharge needle valve as described in claim 6, characterized in that, The outer cap is fixed to the locking cap by screws.

8. The discharge needle valve as described in claim 1, characterized in that, It also includes: an O-ring, which is fitted onto the discharge needle and located between the sealing ring and the needle valve base.

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