A low-wear needle valve

Abstract

The utility model discloses a low-wear needle valve, and relates to the technical field of needle valves. The utility model comprises a hexagonal block, on which a one-way flow mechanism and a valve mechanism are arranged; the one-way flow mechanism comprises a fluid inlet pipe fixedly connected to the left central axis of the hexagonal block, a cross support frame fixedly connected to the inner wall of the fluid inlet pipe, an adapting ring fixedly connected to the inner wall of the fluid inlet pipe, and a piston slidably connected to the inner wall of the adapting ring. The utility model solves the problem that when the valve is closed, the backflow of the fluid cannot be effectively prevented, thereby causing a loss of system pressure in the system, reducing the efficiency of the system, and causing the backflow of the fluid to an area that should not exist, thereby causing safety hazards, such as fire or explosion in chemical plants or petrochemical facilities.

Description

Technical Field

[0001] The utility model belongs to the technical field of needle valves, in particular to a low-wear needle valve. Background Art

[0002] The needle valve is a valve that can be precisely adjusted and has a wide range of uses. For example, the cutting distance used in flame cutting and the knob for adjusting the flame temperature are needle valves. Instrument needle valves are an important component in instrument measurement pipeline systems. They mainly include stop valves and ball valves. Their function is to open or cut off pipeline passages. The valve core of the needle valve is a very sharp cone, which is inserted into the valve seat like a needle, hence the name.

[0003] However, existing needle valves often ignore the control of the flow direction of the fluid in the needle valve when in use. When the valve is closed, it cannot effectively prevent the backflow of the fluid, which leads to system pressure loss in the system, reduces the efficiency of the system, and causes the fluid to flow back to areas where it should not exist, thereby causing safety hazards. For example, it may cause dangerous situations such as fire or explosion in chemical plants or petrochemical facilities. Utility Model Content

[0004] The utility model aims to provide a low-wear needle valve, which solves the problem that when the valve is closed, the reverse flow of the fluid cannot be effectively prevented by setting a one-way flow mechanism, thereby causing a loss of system pressure in the system, reducing the efficiency of the system, and causing the fluid to flow back to areas where it should not exist, thereby causing safety hazards, such as fire or explosion in chemical plants or petrochemical facilities.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a low-wear needle valve, comprising a hexagonal block, on which a one-way flow mechanism and a valve mechanism are arranged;

[0007] The one-way flow mechanism includes a fluid inlet pipe fixedly connected to the left central axis of the hexagonal block, a cross support frame fixedly connected to the inner wall of the fluid inlet pipe, an adapting ring fixedly connected to the inner wall of the fluid inlet pipe, and a piston slidably connected to the inner wall of the adapting ring.

[0008] Furthermore, a telescopic rod is fixedly connected to the left central axis of the cross support frame, and the end of the telescopic rod away from the cross support frame is fixedly connected to the piston. A spring 1 is sleeved on the telescopic rod, and the right end of the spring 1 is fixedly connected to the cross support frame, and the end of the spring 1 away from the cross support frame is fixedly connected to the piston. A threaded groove 1 is opened on the outer wall of the fluid inlet pipe.

[0009] Furthermore, the valve mechanism comprises a cylinder connected through the central axis of the top of the hexagonal block, and an adapter ring is fixedly connected to the inner wall of the cylinder.

[0010] Furthermore, a connecting shaft is threadedly connected to the inner wall of the adapter ring, the connecting shaft thread penetrates the outer wall of the adapter ring and extends to the outside, and a handle is fixedly connected to the top extension portion of the connecting shaft.

[0011] Furthermore, two sealing gaskets are slidably connected to the outer wall of the connecting shaft, the sealing gasket located at the bottom is fixedly connected to the top of the hexagonal block, a baffle is fixedly connected to the outer wall of the connecting shaft and slidably connected, the outer wall of the baffle is fixedly connected to the cylinder, and the bottom of the baffle is fixedly connected to the sealing gasket located at the top.

[0012] Furthermore, a limiting ring is slidably sleeved on the outer wall of the connecting shaft, and a conical block is fixedly connected to the end of the connecting shaft away from the handle;

[0013] Furthermore, a fluid inlet groove is provided in the hexagonal block, the fluid inlet groove is connected to the fluid inlet pipe, the conical block is adapted to the fluid inlet groove, a transfer groove is provided in the hexagonal block, and the outer wall of the limit ring is fixedly connected to the transfer groove;

[0014] Furthermore, a fluid outlet groove is provided in the hexagonal block, a fluid outlet pipe is fixedly connected to the left side of the hexagonal block, the fluid outlet pipe is connected to the fluid outlet groove, and a second thread groove is provided on the outer wall of the fluid outlet pipe.

[0015] The utility model has the following beneficial effects:

[0016] 1. By setting a one-way flow mechanism, when the fluid flows through the fluid inlet pipe, the fluid pushes the piston in the fluid inlet pipe to move to the right under the action of the system pressure, compressing the spring 1 on the telescopic rod. When the piston leaves the adapter ring, the fluid can flow through the entire device through the fluid inlet pipe. When the valve mechanism is closed, the pressure in the system remains balanced, and the piston will push the piston to the left under the action of the elastic potential energy of spring 1, so that it cooperates with the adapter ring to form a smooth and reverse closed circulation system, preventing fluid backflow and ensuring that the fluid can only pass in one direction, ensuring the stability and safety of the system, helping to maintain the normal operation of the system, and preventing damage or performance degradation that may be caused by fluid backflow, thereby extending the life of the valve and improving the reliability and performance of the system;

[0017] 2. By setting up the valve mechanism, when the valve needs to be opened, the handle can be turned first, and the handle drives the connecting shaft to rotate. The connecting shaft drives the connecting shaft to move upward under the action of the adapter ring in the cylinder, and the connecting shaft drives the cone block to move upward, thereby opening a gap between the fluid inlet groove and the transfer groove, so that the fluid can flow in the device, so that the position of the valve core can be adjusted to change the channel size of the fluid through the valve, thereby controlling the flow rate and flow of the fluid, which can provide higher precision and stability and expand the use occasions of the device.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a structural schematic diagram of a low-wear needle valve of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of a low-wear needle valve in front section of the utility model;

[0022] Figure 3 This utility model is a low-wear needle valve Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0023] Figure 4 This utility model is a low-wear needle valve Figure 2 A schematic diagram of the enlarged structure of B;

[0024] Figure 5 This utility model is a low-wear needle valve Figure 2 Schematic diagram of the enlarged structure of C in the figure.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Hexagonal block; 2. One-way flow mechanism; 21. Fluid inlet pipe; 22. Cross support frame; 23. Adapter ring; 24. Piston; 25. Telescopic rod; 26. Spring one; 27. Thread groove one; 3. Valve mechanism; 31. Cylinder; 32. Adapter ring; 33. Connecting shaft; 34. Handle; 35. Sealing gasket; 36. Baffle; 37. Limit ring; 38. Conical block; 4. Fluid inlet groove; 5. Transfer groove; 6. Fluid outlet groove; 7. Fluid outlet pipe; 8. Thread groove two. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on 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.

[0028] See also Figure 1-5 As shown, the utility model is a low-wear needle valve, comprising a hexagonal block 1, on which a one-way flow mechanism 2 and a valve mechanism 3 are arranged;

[0029] The one-way flow mechanism 2 includes a fluid inlet pipe 21 fixedly connected to the left central axis of the hexagonal block 1, a cross support frame 22 fixedly connected to the inner wall of the fluid inlet pipe 21, an adapter ring 23 fixedly connected to the inner wall of the fluid inlet pipe 21, and a piston 24 slidably connected to the inner wall of the adapter ring 23.

[0030] The hexagonal block 1 and the fluid inlet pipe 21 are made of low-wear materials.

[0031] Among them Figure 2 and Figure 4 As shown, a telescopic rod 25 is fixedly connected to the left central axis of the cross support frame 22, and one end of the telescopic rod 25 away from the cross support frame 22 is fixedly connected to the piston 24. A spring 26 is sleeved on the telescopic rod 25, and the right end of the spring 26 is fixedly connected to the cross support frame 22, and one end of the spring 26 away from the cross support frame 22 is fixedly connected to the piston 24. A threaded groove 27 is provided on the outer wall of the fluid inlet pipe 21.

[0032] By setting up the one-way flow mechanism 2, it is possible to ensure that the fluid can only pass in one direction, ensuring the stability and safety of the system, helping to maintain the normal operation of the system, and preventing damage or performance degradation that may be caused by fluid backflow, thereby extending the life of the valve and improving the reliability and performance of the system.

[0033] Among them Figure 4 As shown, the valve mechanism 3 includes a cylinder 31 which is connected through the top center axis of the hexagonal block 1 , and an adapter ring 32 is fixedly connected to the inner wall of the cylinder 31 .

[0034] By setting up the valve mechanism 3, the position of the valve core can be adjusted to change the channel size of the fluid passing through the valve, thereby controlling the flow rate and flow of the fluid, providing higher precision and stability, and expanding the use occasions of the device, wherein the cylinder 31 is made of low-wear material.

[0035] Among them Figure 4 As shown, a connecting shaft 33 is threadedly connected to the inner wall of the adapter ring 32 , and the connecting shaft 33 threadably penetrates the outer wall of the adapter ring 32 and extends to the outside, and a handle 34 is fixedly connected to the top extension portion of the connecting shaft 33 .

[0036] By providing the handle 34 , the wear of the valve can be reduced, the service life of the valve can be extended, and the operating efficiency of the valve can be improved, wherein the adapter ring 32 is made of a low-wear material.

[0037] Among them Figure 5 As shown, two sealing gaskets 35 are slidably connected to the outer wall of the connecting shaft 33, the sealing gasket 35 located at the bottom is fixedly connected to the top of the hexagonal block 1, and a baffle 36 is fixedly connected to the outer wall of the connecting shaft 33 and slidably connected. The outer wall of the baffle 36 is fixedly connected to the cylinder 31, and the bottom of the baffle 36 is fixedly connected to the sealing gasket 35 located at the top.

[0038] By providing the sealing gasket 35, an effective seal can be formed between the valve core and the valve seat to prevent the medium from leaking out of the valve when the valve is closed, thereby ensuring the sealing performance of the valve.

[0039] Among them Figure 5 As shown, a limiting ring 37 is slidably sleeved on the outer wall of the connecting shaft 33 , and a conical block 38 is fixedly connected to one end of the connecting shaft 33 away from the handle 34 .

[0040] By setting the conical block 38, it can perfectly cooperate with the valve seat to form a better seal. When the conical block 38 rotates or moves up and down, the cone can ensure that the sealing surface between the cone and the hexagonal block 1 always maintains good contact to prevent medium leakage.

[0041] Among them Figure 2 and Figure 5 As shown, a fluid inlet groove 4 is provided in the hexagonal block 1, and the fluid inlet groove 4 is connected to the fluid inlet pipe 21. The conical block 38 is adapted to the fluid inlet groove 4. A transfer groove 5 is provided in 1, and the outer wall of the limit ring 37 is fixedly connected to the transfer groove 5.

[0042] By setting the limit ring 37, the stroke of the conical block 38 can be limited to ensure that the conical block 38 moves within the set range, avoid excessive opening or closing to cause wear of the conical block 38 or the hexagonal block 1, and extend the service life of the valve.

[0043] Among them Figure 2 As shown, a fluid outlet groove 6 is provided in the hexagonal block 1 , a fluid outlet pipe 7 is fixedly connected to the left side of the hexagonal block 1 , the fluid outlet pipe 7 is connected to the fluid outlet groove 6 , and a thread groove 8 is provided on the outer wall of the fluid outlet pipe 7 .

[0044] By providing the second thread groove 8, the durability of the device can be improved to ensure that it will not fall off or be damaged during long-term use, wherein the fluid outlet pipe 7 is made of a low-wear material.

[0045] A specific application of this embodiment is: before use, first install the device in the system through the fluid inlet pipe 21 and the fluid outlet pipe 7 through the thread groove 1 27 and the thread groove 2 8. After installation, it can be used. When using, the handle 34 can be turned first, and the handle 34 drives the connecting shaft 33 to rotate. The connecting shaft 33 drives the connecting shaft 33 to move upward under the action of the adapter ring 32 in the cylinder 31, and the connecting shaft 33 drives the conical block 38 to move upward, so that a gap is opened between the fluid inlet groove 4 and the transfer groove 5, so that the fluid can circulate in the device. When the fluid flows through the fluid inlet pipe 21, Under the action of the system pressure, the fluid pushes the piston 24 in the fluid inlet pipe 21 to move to the right, compressing the spring 26 on the telescopic rod 25. When the piston 24 leaves the adapter ring 23, the fluid can flow through the entire device through the fluid inlet pipe 21. When the valve mechanism 3 is closed, the pressure in the system remains balanced, and the piston 24 will be pushed to move to the left under the action of the elastic potential energy of the spring 26, so that it cooperates with the adapter ring 23 to form a smooth and reverse closed circulation system, preventing the fluid from flowing back, ensuring that the fluid can only pass in one direction, and ensuring the stability and safety of the system.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A low-wear needle valve, comprising a hexagonal block (1), characterized in that: The hexagonal block (1) is provided with a one-way flow mechanism (2) and a valve mechanism (3); The one-way flow mechanism (2) comprises a fluid inlet pipe (21) fixedly connected to the left outer wall of the hexagonal block (1), a cross support frame (22) fixedly connected to the inner wall of the fluid inlet pipe (21), an adapting ring (23) fixedly connected to the inner wall of the fluid inlet pipe (21), and a piston (24) slidably connected to the inner wall of the adapting ring (23).

2. A low-wear needle valve according to claim 1, characterized in that: A telescopic rod (25) is fixedly connected to the left central axis of the cross support frame (22); one end of the telescopic rod (25) away from the cross support frame (22) is fixedly connected to the piston (24); a spring (26) is sleeved on the telescopic rod (25); the right end of the spring (26) is fixedly connected to the cross support frame (22); one end of the spring (26) away from the cross support frame (22) is fixedly connected to the piston (24); and a threaded groove (27) is provided on the outer wall of the fluid inlet pipe (21).

3. A low-wear needle valve according to claim 2, characterized in that: The valve mechanism (3) comprises a cylinder (31) which is connected through the central axis of the top of the hexagonal block (1), and an adaptor ring (32) is fixedly connected to the inner wall of the cylinder (31).

4. A low-wear needle valve according to claim 3, characterized in that: A connecting shaft (33) is threadedly connected to the inner wall of the adapter ring (32), the connecting shaft (33) threadedly penetrates the outer wall of the adapter ring (32) and extends to the outside, and a handle (34) is fixedly connected to the top extension portion of the connecting shaft (33).

5. A low-wear needle valve according to claim 4, characterized in that: Two sealing gaskets (35) are slidably connected to the outer wall of the connecting shaft (33), the sealing gasket (35) located at the bottom is fixedly connected to the top of the hexagonal block (1), a baffle (36) is slidably connected to the outer wall of the connecting shaft (33), the outer wall of the baffle (36) is fixedly connected to the cylinder (31), and the bottom of the baffle (36) is fixedly connected to the sealing gasket (35) located at the top.

6. A low-wear needle valve according to claim 5, characterized in that: A limiting ring (37) is slidably sleeved on the outer wall of the connecting shaft (33), and a conical block (38) is fixedly connected to one end of the connecting shaft (33) away from the handle (34).

7. A low-wear needle valve according to claim 6, characterized in that: A fluid inlet groove (4) is provided in the hexagonal block (1), the fluid inlet groove (4) is connected to the fluid inlet pipe (21), the conical block (38) is adapted to the fluid inlet groove (4), a transfer groove (5) is provided in the hexagonal block (1), and the outer wall of the limit ring (37) is fixedly connected to the transfer groove (5).

8. A low-wear needle valve according to claim 7, characterized in that: A fluid outlet groove (6) is provided in the hexagonal block (1), a fluid outlet pipe (7) is fixedly connected to the left side of the hexagonal block (1), the fluid outlet pipe (7) is connected to the fluid outlet groove (6), and a second thread groove (8) is provided on the outer wall of the fluid outlet pipe (7).

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