Gas-solid two-phase flow regulating valve

Abstract

The utility model relates to the technical field of valves, and particularly discloses a gas-solid two-phase flow regulating valve which comprises a shell, an inlet pipe and an outlet pipe are arranged on two sides of the shell respectively, a sealing seat is arranged at the upper end in the shell, and one end, located in the shell, of the outlet pipe is connected with the sealing seat. A matched throttling cylinder corresponding to the outflow pipe is arranged in the lower end of the sealing seat; the throttling head is controlled to move up and down through the auxiliary valve rod, the throttling head can be controlled to occupy the inner space of the throttling cylinder to different degrees, flow speed control is achieved, the flow speed can be accurately controlled, meanwhile, the valve has the outer sealing effect, the middle sealing effect, the inner sealing effect and the like through the sealing ring, the sealing protrusion and the throttling head, and the service life of the valve is prolonged. Therefore, not only is the sealing effect of the valve effectively improved, but also the corresponding sealing effect can be achieved through the other sealing pieces when one sealing piece is abraded, and therefore the phenomenon that the valve is prone to being damaged due to rapid abrasion is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a gas-solid two-phase flow control valve. Background Art

[0002] Pipes are a commonly used and widely applied transportation method, and valves are essential control components when transporting media through pipes. For example, for valves used in the pressurized transportation of pulverized coal, the structure characteristics of the existing Chinese patent with the application number 201310354617.9 for a high-pressure differential gas-solid two-phase flow control valve are as follows: a valve cage is arranged in the inner cavity formed by the valve cover and the valve body, and flow holes are evenly distributed on the valve cage. The medium from the valve inlet enters the inner cavity of the valve body through the flow holes on the valve cage; a throttling element is fixedly arranged in the valve body, and the cylindrical inner cavity of the throttling element is communicated with the valve outlet. Throttling holes with diameters gradually decreasing from top to bottom are sequentially arranged along the axial direction on the cylindrical wall of the throttling element.

[0003] When the above-mentioned technology is used, although it can play a role in regulating the flow rate and reducing the wear of the sealing surface to a certain extent, a single sealing surface cannot achieve an effective sealing effect. The setting of three pairs of throttling holes makes it impossible for the valve to achieve stepless regulation when in use, that is, it cannot finely adjust the flow rate. Therefore, there are still certain limitations when the above-mentioned technology is used; thus, in order to solve the above technical problems, we propose a gas-solid two-phase flow control valve. Summary of the Utility Model

[0004] In view of the above problems in the prior art, the utility model provides a gas-solid two-phase flow control valve with good sealing effect and capable of finely adjusting the flow rate.

[0005] To achieve the above object, the technical solution adopted by the utility model is:

[0006] A gas-solid two-phase flow control valve includes a housing. An inlet pipe and an outlet pipe are respectively arranged on both sides of the housing. A sealing seat is arranged at the upper end inside the housing. The end of the outlet pipe located inside the housing is connected to the sealing seat. A throttling cylinder matching the outlet pipe is correspondingly arranged inside the lower end of the sealing seat. A main valve rod is installed at the lower end of the housing. A secondary valve rod is installed in the middle of the main valve rod. The upper end of the secondary valve rod extends into the housing and is provided with a conical throttling head matching the throttling cylinder. The end of the main valve rod located inside the housing is provided with a ring-shaped sealing protrusion matching the lower surface of the sealing seat. A sealing ring is slidably arranged on the outer ring surface of the sealing protrusion through a top spring.

[0007] Preferably, an installation groove is arranged inside the sealing ring. One end of the top spring is located in the installation groove, and the other end of the top spring is in contact with the end of the main valve rod.

[0008] Preferably, several guiding protrusions are arranged on the inner side of the sealing ring, and guiding grooves matching the guiding protrusions are arranged on the outer ring surface of the end of the main valve rod.

[0009] Preferably, a contact surface is provided at the lower end inside the throttle barrel, and the contact surface fits with the outer ring surface of the throttle head.

[0010] Preferably, the upper end of the sealing protrusion is V-shaped, and a matching receiving groove is provided at the lower end of the sealing seat corresponding to the upper end of the sealing protrusion.

[0011] Preferably, a receiving cavity is provided at the end of the main valve stem inside the housing, and the lower end of the throttle head is received in the receiving cavity.

[0012] Preferably, handwheels are provided at one ends of the main valve stem and the auxiliary valve stem outside the housing, and anti-slip patterns are provided on the outer ring surfaces of the handwheels.

[0013] Due to the adoption of the above technical solution, compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, by controlling the up and down movement of the throttle head through the auxiliary valve stem, the degree of encroachment of the throttle head on the internal space of the throttle barrel can be controlled, thereby realizing flow rate control. Therefore, compared with the traditional scheme, the present scheme can accurately control the flow rate according to specific usage requirements. At the same time, when it is necessary to close the valve, the operator controls the main valve stem and the auxiliary valve stem to move towards the sealing seat until the sealing protrusion at the end of the main valve stem abuts against the sealing seat, and the throttle head abuts against the throttle barrel, that is, a first seal is formed between the sealing protrusion of the main valve stem and the sealing seat, a second seal is formed between the sealing seat and the sealing ring, and a third seal is formed between the throttle head and the throttle barrel. Thus, through the sealing ring, the sealing protrusion and the throttle head, the valve has triple sealing effects of outer, middle and inner, which not only effectively improves the sealing effect of the valve, but also when one of the sealing parts is worn, the remaining sealing parts can still play the corresponding sealing effect, thereby effectively reducing the phenomenon that the valve is easily damaged due to rapid wear.

[0015] 2. In the present utility model, the installation groove is provided to facilitate the guiding and limiting of the top spring, and the guiding protrusion is provided to facilitate the guiding and limiting of the sealing ring, so that the sealing ring moves more stably; since a contact surface is provided at the lower end inside the throttle barrel, when the valve is closed, the throttle head can be urged to closely fit with the contact surface of the throttle barrel through the auxiliary valve stem, thereby further improving the sealing performance of the valve; the receiving groove provided on the lower surface of the sealing seat makes the sealing effect between the sealing protrusion at the end of the main valve stem and the sealing seat better when they are combined; the setting of the receiving cavity facilitates the receiving of the throttle head, that is, when the valve needs to be fully opened, the throttle head can be conveniently moved away from the throttle barrel; the setting of the handwheel facilitates the rotation of the main valve stem and the auxiliary valve stem. Description of the Drawings

[0016] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present utility model, other objects and results of the present utility model will become clearer and easier to understand. In the drawings:

[0017] Figure 1 Isometric schematic diagram of the gas-solid two-phase flow control valve proposed by the present utility model;

[0018] Figure 2 Schematic diagram of the internal components of the housing of the gas-solid two-phase flow control valve proposed by the present utility model;

[0019] Figure 3 Schematic diagram of the cooperation between the throttle barrel and the throttle head of the gas-solid two-phase flow control valve proposed by the present utility model;

[0020] Figure 4 Schematic diagram of the disassembly of the sealing ring and the main valve stem of the gas-solid two-phase flow control valve proposed by the present utility model;

[0021] Figure 5 Schematic diagram of the cooperation between the main valve stem and the sealing seat of the gas-solid two-phase flow control valve proposed by the present utility model;

[0022] Figure 6 Schematic diagram of the structure of the gas-solid two-phase flow control valve proposed by the present utility model.

[0023] The reference numerals therein include: 1, housing; 2, inlet pipe; 3, outlet pipe; 4, sealing seat; 5, throttle barrel; 6, main valve stem; 7, auxiliary valve stem; 8, throttle head; 9, sealing protrusion; 10, sealing ring; 11, top spring; 12, guiding protrusion. Detailed implementation manners

[0024] The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope protected by the present utility model.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. It should be pointed out that all the attached drawings are exemplary representations. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The following further describes the present utility model in detail through specific embodiments and in conjunction with the attached drawings.

[0028] Embodiment 1

[0029] Referring to Figures 1-6 , the gas-solid two-phase flow regulating valve includes a housing 1. An inlet pipe 2 and an outlet pipe 3 are respectively provided on both sides of the housing 1. A sealing seat 4 is provided at the upper end inside the housing 1. The end of the outlet pipe 3 located inside the housing 1 is connected to the sealing seat 4. A throttling cylinder 5 that matches the outlet pipe 3 is provided inside the lower end of the sealing seat 4. A main valve stem 6 is installed at the lower end of the housing 1. A secondary valve stem 7 is installed in the middle of the main valve stem 6. The upper end of the secondary valve stem 7 extends into the housing 1 and a tapered throttling head 8 that matches the throttling cylinder 5 is provided. The end of the main valve stem 6 located inside the housing 1 is provided with a matching annular sealing projection 9 on the lower surface of the sealing seat 4. A sealing ring 10 is slidably provided on the outer ring surface of the sealing projection 9 through a top spring 11.

[0030] Embodiment 2

[0031] Referring to Figures 1-6 , on the condition that other parts are the same as those in Embodiment 1, the difference between this embodiment and Embodiment 1 is that:

[0032] An installation groove is provided inside the sealing ring 10. One end of the top spring 11 is located in the installation groove, and the other end of the top spring 11 is in contact with the end of the main valve stem 6. The arrangement of the installation groove facilitates the guiding and limiting of the top spring 11. A plurality of guiding protrusions 12 are provided on the inner side of the sealing ring 10. A guiding groove that matches the guiding protrusions 12 is provided on the outer ring surface of the end of the main valve stem 6. The arrangement of the guiding protrusions 12 facilitates the guiding and limiting of the sealing ring 10, so that the sealing ring 10 is more stable when moving; a contact surface is provided at the lower end inside the throttling cylinder 5, and the contact surface fits with the outer ring surface of the throttling head 8. Since the contact surface is provided at the lower end inside the throttling cylinder 5, when the valve is closed, the throttling head 8 can be urged by the secondary valve stem 7 to closely fit with the contact surface of the throttling cylinder 5, thereby further improving the sealing performance of the valve.

[0033] The upper end of the sealing projection 9 is V-shaped. A mating receiving groove is provided at the lower end of the sealing seat 4 corresponding to the upper end of the sealing projection 9. The receiving groove provided on the lower surface of the sealing seat 4 enables a better sealing effect between the sealing projection 9 at the end of the main valve stem 6 and the sealing seat 4 when they are combined. One end of the main valve stem 6 located inside the housing 1 is provided with a receiving cavity, and the lower end of the throttle head 8 is received in the receiving cavity. The setting of the receiving cavity facilitates the storage of the throttle head 8, that is, when the valve needs to be fully opened, the throttle head 8 can be conveniently moved away from the throttle barrel 5. Handwheels are provided at one end of both the main valve stem 6 and the auxiliary valve stem 7 located outside the housing 1. The outer ring surface of the handwheel is provided with anti-slip lines. The setting of the handwheel facilitates the rotation of the main valve stem 6 and the auxiliary valve stem 7.

[0034] Principle of use and advantages: During the use of the present utility model, the valve is composed of the housing 1 and various components installed inside the housing 1. The seals between the valve stems and between the valve stems and the housing 1 are all prior arts and will not be elaborated in detail in this solution. When the regulating valve proposed in this solution is in use, the medium to be transported is conveyed into the housing 1 through the inlet pipe 2, then enters the sealing seat 4 through the throttle barrel 5, and further flows out through the outlet pipe 3 from inside the sealing seat 4. At this time, since the throttle head 8 is received in the receiving cavity at the end of the main valve stem 6, the throttle head 8 is completely not inside the throttle barrel 5, that is, the throttle head 8 cannot occupy the internal space of the throttle barrel 4, so that the transported medium can pass through the throttle barrel 5 into the sealing seat 4 at full speed. When it is necessary to reduce the conveying speed, the operator rotates the auxiliary valve stem 7, causing the auxiliary valve stem 7 to move into the housing 1, that is, the auxiliary valve stem 7 pushes the throttle head 8 into the throttle barrel 5 until the tapered end of the throttle head 8, that is, the smallest end of the throttle head 8. At this time, since the end of the throttle head 8 occupies the lower space of the throttle barrel 5, the internal space of the throttle barrel 5 is reduced, and thus the medium cannot all pass through the throttle barrel 5 into the sealing seat 4, thereby achieving the effect of regulating the conveying speed of the medium.

[0035] Therefore, in the above process, the operator controls the up and down movement of the throttle head 8 through the auxiliary valve stem 7, and can control the occupation of the internal space of the throttle barrel 5 by the throttle head 8 to different degrees, thereby realizing the flow rate control. Compared with the traditional solution, this solution can accurately control the flow rate according to specific usage requirements. At the same time, when it is necessary to close the valve, the operator controls the main valve stem 6 to move towards the sealing seat 4 until the sealing projection 9 at the end of the main valve stem 6 abuts against the sealing seat 4, that is, a first seal is formed between the sealing projection 9 of the main valve stem 6 and the sealing seat 4. At this time, since the sealing projection 9 covers the throttle barrel 5, the medium inside the housing 1 cannot enter the throttle barrel 5, thus realizing the closing of the valve.

[0036] Further, during the above process, when the main valve stem 6 pushes the sealing projection 9 to engage with the sealing seat 4, the sealing ring 10 on the outer ring surface of the main valve stem 6 synchronously engages with the sealing seat 4. At this time, a second seal is formed between the sealing seat 4 and the sealing ring 10, which further enhances the sealing effect of the valve. Moreover, through the setting of the top spring 11, when the valve is closed, the sealing ring 10 first engages with the sealing seat 4, thereby further reducing the contact between the sealing projection 9 and the rapidly flowing medium, thus reducing the abrasion of the sealing projection 9, that is, reducing the phenomenon of easy damage of the valve caused by the rapid wear of the sealing components. And when the sealing ring 10 engages with the sealing seat 4, the throttle head 8 can be controlled by the auxiliary valve stem 7 to closely fit with the throttle barrel 5. At this time, a third seal is formed. Thus, through the sealing ring 10, the sealing projection 9 and the throttle head 8, the valve has triple sealing effects, namely outer, middle and inner seals. This not only effectively improves the sealing effect of the valve, but also when one of the sealing components is worn, the remaining sealing components can still play the corresponding sealing effect, thereby effectively reducing the phenomenon of easy damage of the valve caused by rapid wear.

[0037] It should be further noted that the setting of the installation groove facilitates the guiding and limiting of the top spring 11, and the setting of the guiding projection 12 facilitates the guiding and limiting of the sealing ring 10, so that the sealing ring 10 moves more stably. Since the lower end inside the throttle barrel 5 is provided with a contact surface, when the valve is closed, the auxiliary valve stem 7 can be used to make the throttle head 8 closely fit with the contact surface of the throttle barrel 5, thereby further improving the sealing performance of the valve. The accommodating groove provided on the lower surface of the sealing seat 4 makes the sealing effect better when the sealing projection 9 at the end of the main valve stem 6 engages with the sealing seat 4. The setting of the storage cavity facilitates the storage of the throttle head 8, that is, when the valve needs to be fully opened, the throttle head 8 can be conveniently separated from the throttle barrel 5. The setting of the handwheel facilitates the rotation of the main valve stem 6 and the auxiliary valve stem 7.

[0038] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. Gas-solid two-phase flow control valve, comprising a housing (1), characterized in that, On both sides of the said housing (1), an inlet pipe (2) and an outlet pipe (3) are respectively provided. At the upper end inside the housing (1), a sealing seat (4) is provided. The end of the outlet pipe (3) inside the housing (1) is connected to the sealing seat (4). Inside the lower end of the sealing seat (4) corresponding to the outlet pipe (3), a throttling cylinder (5) is provided which is in cooperation. At the lower end of the housing (1), a main valve stem (6) is installed. In the middle of the main valve stem (6), a secondary valve stem (7) is installed. The upper end of the secondary valve stem (7) extends into the housing (1) and a conical throttling head (8) which is in cooperation with the throttling cylinder (5) is provided. At the end of the main valve stem (6) inside the housing (1), a ring-shaped sealing protrusion (9) which is in cooperation with the lower surface of the sealing seat (4) is provided. On the outer ring surface of the sealing protrusion (9), a sealing ring (10) is slidably provided through a top spring (11).

2. The gas-solid two-phase flow control valve according to claim 1, characterized in that, An installation groove is provided inside the said sealing ring (10). One end of the top spring (11) is located in the installation groove, and the other end of the top spring (11) is in contact with the end of the main valve stem (6).

3. The gas-solid two-phase flow control valve according to claim 1, characterized in that, A number of guiding protrusions (12) are provided on the inner side of the said sealing ring (10). On the outer ring surface of the end of the main valve stem (6), guiding grooves which are in cooperation with the guiding protrusions (12) are provided.

4. The gas-solid two-phase flow control valve according to claim 1, characterized in that At the lower end inside the said throttling cylinder (5), a contact surface is provided, and the contact surface is in fit with the outer ring surface of the throttling head (8).

5. The gas-solid two-phase flow regulating valve according to claim 1, characterized in that The upper end of the said sealing protrusion (9) is V-shaped, and a receiving groove which is in cooperation with the upper end of the sealing protrusion (9) is provided at the lower end of the sealing seat (4).

6. The gas-solid two-phase flow regulating valve according to claim 1, characterized in that At the end of the main valve stem (6) inside the housing (1), a receiving cavity is provided, and the lower end of the throttling head (8) is received in the receiving cavity.

7. The gas-solid two-phase flow control valve according to claim 1, wherein At the end of the main valve stem (6) and the secondary valve stem (7) outside the housing (1), handwheels are provided. Anti-slip patterns are provided on the outer ring surface of the handwheels.

Images