Multi-stage regulating valve

Abstract

The utility model relates to the technical field of regulating valves, and discloses a multistage regulating valve which comprises a valve body, a first connecting flange and a second connecting flange, the first connecting flange and the second connecting flange are arranged at two ends of the valve body, a barrel is arranged between the first connecting flange and the valve body, one end of the barrel is fixedly connected with the first connecting flange, and the other end of the barrel is slidably connected with the valve body. The end, away from the first connecting flange, of the barrel is detachably connected with a sealing piece, and the barrel is connected with the valve body in a sealed mode through the sealing piece. The adjusting valve can solve the problem that in the prior art, when the length of the adjusting valve is not matched with the length between two pipelines, maintenance personnel can achieve connection between the adjusting valve and the pipelines only by additionally arranging a transition short pipe, and the workload is large.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of governing valve especially relates to a multistage governing valve. BACKGROUND

[0002] The multistage governing valve is the key equipment in the industrial process control system, it contains a valve body component, the component inside is equipped with the component for adjusting the process fluid flow rate, and is connected with one or more executing mechanisms, and the task of executing mechanism is to respond to the signal from the control element, thereby driving the action of valve body.

[0003] In the prior art, when the length of the governing valve does not match the length between the two pipes during the installation process of the governing valve, the maintenance personnel need to increase the transition short pipe to realize the connection of the governing valve and the pipe, and the workload is large. UTILITY MODEL CONTENT

[0004] Therefore, the utility model discloses a multistage governing valve, which solves the problem that the maintenance personnel need to increase the transition short pipe to realize the connection of the governing valve and the pipe when the length of the governing valve does not match the length between the two pipes in the prior art.

[0005] The utility model solves the above technical problem through the following technical scheme:

[0006] A multistage governing valve, comprising a valve body and first and second connecting flanges arranged at both ends of the valve body, a cylinder body is arranged between the first connecting flange and the valve body, one end of the cylinder body is fixedly connected with the first connecting flange, and the other end is slidably connected with the valve body, a sealing element is detachably connected with the end of the cylinder body away from the first connecting flange, and the cylinder body is sealingly connected with the valve body through the sealing element.

[0007] Through the above structure, the position of the first connecting flange can be changed by sliding the cylinder body, so that the length mismatching between the two pipes can be adapted, the workload of the maintenance personnel is reduced, and the maintenance efficiency is improved.

[0008] Further, the sealing element comprises a first sealing ring, a sealing groove is formed in the end of the cylinder body close to the first sealing ring, and a second sealing ring is fixedly installed in the sealing groove, when the first sealing ring is connected with the cylinder body, the first sealing ring enters the sealing groove and abuts against the second sealing ring to seal.

[0009] Through the above structure, the first sealing ring and the second sealing ring are matched to improve the sealing performance between the cylinder body and the valve body.

[0010] Further, the first sealing ring is provided with a first guide slope, and the second sealing ring is provided with a second guide slope, the first sealing ring is guided by the first guide slope and the second guide slope when the first sealing ring enters the sealing groove, and the first sealing ring is tightly sealed against the outer wall of the valve body.

[0011] By the above structure, when the first sealing ring enters the sealing groove, the first guide slope and the second guide slope make the first sealing ring move and tightly seal against the outer wall of the valve body, and the sealing performance between the cylinder and the valve body is further improved.

[0012] Further, a plurality of sealing rings are fixedly arranged on the circumferential outer side of the first sealing ring, and the inner wall of the sealing groove is tightly sealed against the plurality of sealing rings when the first sealing ring enters the sealing groove.

[0013] By the above structure, the plurality of sealing rings seal the gap between the first sealing ring and the inner wall of the sealing groove, and the sealing performance is improved.

[0014] Further, the second sealing ring is fixedly connected to the end wall of the sealing groove through a fixing bolt.

[0015] Further, a fixing cylinder is slidably arranged on the cylinder, a first fixing ring is arranged on the circumferential inner side of one end of the fixing cylinder, and a second fixing ring is arranged on the circumferential outer side of the other end of the fixing cylinder, the first sealing ring is fixedly installed on the first fixing ring, and the second fixing ring is detachably connected with the first connecting flange.

[0016] By the above structure, the first sealing ring is conveniently connected with the cylinder.

[0017] Further, a plurality of threaded columns are fixedly arranged on the second fixing ring, and a through hole matched with the threaded column is formed in the first connecting flange.

[0018] By the above structure, when fixed, the threaded column is arranged in the through hole of the first connecting flange and the through hole of the pipeline flange, and then fixed by a nut. When removed, the threaded column is knocked, so that the fixing cylinder is separated from the cylinder. The convenience of disassembling the first sealing ring is improved.

[0019] Further, a connecting ring is arranged on the first sealing ring, and the connecting ring is fixedly connected with the first fixing ring through a fixing bolt.

[0020] Further, the first connecting flange is the liquid inlet end, an installation ring is arranged on the circumferential inner side of the end of the cylinder away from the valve body, and a filter screen is installed on the installation ring.

[0021] By the above structure, the impurities in the liquid are prevented from entering the valve body.

[0022] The beneficial effects of the utility model are:

[0023] 1. The utility model discloses a cylinder and sealing element are set up, through sliding cylinder, can change the position of first connecting flange, thereby adapting the situation of length mismatching between two pipelines, reduce the workload of maintenance personnel, improve maintenance efficiency.

[0024] 2. The utility model discloses a first sealing ring and second sealing ring are set up, and first guide inclined plane and second guide inclined plane, when first sealing ring enters into sealing groove, first guide inclined plane and second guide inclined plane make first sealing ring move and abut tightly seal to valve body outer wall, improve the sealing performance between cylinder and valve body.

[0025] 3. The utility model discloses a plurality of sealing rings are set up, and the gap between first sealing ring and the inner wall of sealing groove is sealed, and the sealing performance is further improved.

[0026] 4. The utility model discloses a fixed cylinder and threaded column are set up, when fixing, threaded column is set up in the through -hole of first connecting flange and the through -hole of pipeline flange, then is fixed through nut. When removing, knock threaded column, can make fixed cylinder separate from cylinder, improve the convenience of first sealing ring and cylinder dismounting. DRAWINGS

[0027] Figure 1 It is the structure schematic diagram of a kind of multistage regulating valve of the utility model;

[0028] Figure 2 It is the cross-sectional structure schematic diagram of cylinder part in a kind of multistage regulating valve of the utility model;

[0029] Figure 3 It is Figure 2 the enlarged structure schematic diagram of A in;

[0030] Figure 4 It is the cross-sectional split structure schematic diagram of cylinder part in a kind of multistage regulating valve of the utility model;

[0031] Among them,

[0032] 1, valve body;11, first connecting flange;12, second connecting flange;

[0033] 2, pipeline;

[0034] 3, cylinder;31, sealing groove;32, second sealing ring;321, second guide inclined plane;33, mounting ring;331, filter screen;

[0035] 4, sealing element;41, first sealing ring;411, first guide inclined plane;412, sealing ring;413, connecting ring;

[0036] 5, fixed cylinder; 51, first fixed ring; 52, second fixed ring; 521, threaded column. DETAILED DESCRIPTION

[0037] The advantages and effects of the present application can be understood by those skilled in the art from the disclosure of the specification. It should be noted that the drawings provided in the following examples are only used for illustrative purposes, and the representations are only schematic diagrams, not physical drawings, and should not be construed as limiting the present application. In order to better illustrate the embodiments of the present application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0038] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components. In the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and should not be construed as limiting the present application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0039] As Figures 1-4 shown, the multi-stage regulating valve of the present application comprises a valve body 1, a first connecting flange 11 and a second connecting flange 12 arranged at both ends of the valve body 1, the first connecting flange 11 and the second connecting flange 12 are respectively used for sealing and fixedly connecting with the flanges on the pipes 2 at both ends of the multi-stage regulating valve, a cylinder 3 is arranged between the first connecting flange 11 and the valve body 1, one end of the cylinder 3 is fixedly connected with the first connecting flange 11, and the other end is slidingly connected with the valve body 1. In this embodiment, the first connecting flange 11 is integrally formed with the cylinder 3, and in other embodiments, it can also be welded. The end of the cylinder 3 away from the first connecting flange 11 is detachably connected with a sealing member 4. When the length of the multi-stage regulating valve and the two pipes 2 does not match, the second connecting flange 12 is first sealingly and fixedly connected with the flange on the pipe 2 at the corresponding end, and then the cylinder 3 is slid to make the first connecting flange 11 on the cylinder 3 abut against the flange of the pipe 2 at the corresponding end. When the first connecting flange 11 is fixed in position, the cylinder 3 is sealingly connected with the valve body 1 through the sealing member 4. The multi-stage regulating valve can adapt to the situation that the length of the two pipes 2 does not match, reducing the workload of maintenance personnel and improving the maintenance efficiency.

[0040] In the embodiment, the sealing member 4 comprises a first sealing ring 41, the cylinder body 3 is provided with a sealing groove 31 at one end close to the first sealing ring 41, and a second sealing ring 32 is fixedly installed in the sealing groove 31. When the first sealing ring 41 is connected with the cylinder body 3, the first sealing ring 41 enters the sealing groove 31 and abuts against the second sealing ring 32 to seal. Compared with the first sealing ring 41 alone, the first sealing ring 41 cooperates with the second sealing ring 32 to effectively improve the sealing performance between the cylinder body 3 and the valve body 1.

[0041] In the embodiment, the first sealing ring 41 is provided with a first guide inclined surface 411, and the second sealing ring 32 is provided with a second guide inclined surface 321. When the first sealing ring 41 enters the sealing groove 31, the first guide inclined surface 411 and the second guide inclined surface 321 guide the first sealing ring 41 to move towards the outer wall of the valve body 1 to abut against and seal. Compared with the first sealing ring 41 and the second sealing ring 32 being flat, when the first sealing ring 41 enters the sealing groove 31, the first guide inclined surface 411 and the second guide inclined surface 321 make the first sealing ring 41 move towards the outer wall of the valve body 1 to abut against and seal, and the first sealing ring 41 and the second sealing ring 32 have a larger contact surface, further improving the sealing performance between the cylinder body 3 and the valve body 1.

[0042] In the embodiment, a plurality of sealing rings 412 are fixedly arranged on the circumferential outer side of the first sealing ring 41, and the radii of the plurality of sealing rings 412 gradually increase. The sealing ring 412 close to the second sealing ring 32 has the smallest radius, and the sealing ring 412 far away from the second sealing ring 32 has the largest radius. When the first sealing ring 41 enters the sealing groove 31, the inner wall of the sealing groove 31 abuts against and seals the plurality of sealing rings 412 to improve the sealing performance.

[0043] In the embodiment, the second sealing ring 32 is fixedly connected to the end wall of the sealing groove 31 by a fixing bolt. In other embodiments, the second sealing ring 32 can be fixed to the cylinder body 3 by adhesion.

[0044] In the embodiment, the cylinder body 3 is slidably provided with a fixed cylinder 5, the circumferential inner side of one end of the fixed cylinder 5 is provided with a first fixing ring 51, and the circumferential outer side of the other end is provided with a second fixing ring 52. The first sealing ring 41 is fixedly installed on the first fixing ring 51, and the second fixing ring 52 is detachably connected with the first connecting flange 11. During installation, the second fixing ring 52, the first connecting flange 11 and the corresponding pipeline 2 flange can be fixedly connected by a fixing bolt, without the need for additional fixing of the second fixing ring 52 and the first connecting flange 11, thereby improving the convenience of connecting the first sealing ring 41 with the cylinder body 3.

[0045] In this embodiment, a plurality of threaded posts 521 are fixedly provided on the second fixing ring 52, and the first connecting flange 11 has through holes that match the threaded posts 521. During fixing, the threaded posts 521 are inserted into the through holes of the first connecting flange 11 and the through holes of the pipe 2 flange, and then secured with nuts. During removal, tapping the threaded posts 521 allows the fixing cylinder 5 to detach from the cylinder body 3, improving the ease of disassembly and assembly of the first sealing ring 41.

[0046] In this embodiment, a connecting ring 413 is provided on the first sealing ring 41. The connecting ring 413 is fixedly connected to the first fixing ring 51 by fixing bolts, thereby realizing the fixed connection between the first sealing ring 41 and the first fixing ring 51. In some other embodiments, the sealing connection between the first sealing ring 41 and the first fixing ring 51 can also be achieved by adhesive bonding.

[0047] In this embodiment, the first connecting flange 11 is the liquid inlet end, and an installation ring 33 is provided on the inner circumference of the end of the cylinder 3 away from the valve body 1. A filter screen 331 is installed on the installation ring 33 to prevent impurities in the liquid from entering the valve body 1 and to prevent impurities from clogging the valve body 1.

[0048] The method of using the multi-stage regulating valve of this utility model is as follows:

[0049] When installing a multi-stage control valve:

[0050] First, the second connecting flange 12 is sealed and fixedly connected to the flange on the corresponding end of the pipe 2. Then, the cylinder 3 is slid so that the first connecting flange 11 on the cylinder 3 abuts against the flange on the corresponding end of the pipe 2.

[0051] Subsequently, the fixed cylinder 5 is slid towards the first connecting flange 11, so that the first sealing ring 41 enters the sealing groove 31 until the first sealing ring 41 abuts against the second sealing ring 32. At the same time, the threaded post 521 on the second fixed ring 52 passes through the through hole of the first connecting flange 11 and is inserted into the through hole of the flange of the corresponding end pipe 2.

[0052] Finally, tighten the nut onto the threaded post 521 to secure the fixed cylinder 5, the first connecting flange 11, and the flange of the corresponding end pipe 2. During the tightening of the nut, the first sealing ring 41 and the second sealing ring 32 are brought into contact and sealed.

[0053] When disassembling a multi-stage regulating valve: loosen the nut from the threaded post 521, tap the threaded post 521 to loosen the fixed cylinder 5 from the cylinder body 3, and then slide the cylinder body 3 to disengage from the flange of the corresponding pipe 2.

[0054] The above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application. The technical, shape, and structure parts not described in detail in the present application are well-known technologies.

Claims

1. A multi-stage regulating valve comprising a valve body (1) and a first connecting flange (11) and a second connecting flange (12) arranged at both ends of the valve body (1), characterized in that: The first connecting flange (11) is provided with a cylinder (3) between the valve body (1), one end of the cylinder (3) is fixedly connected with the first connecting flange (11), the other end is slidably connected with the valve body (1), the end of the cylinder (3) away from the first connecting flange (11) is detachably connected with a sealing element (4), the cylinder (3) is sealedly connected with the valve body (1) through the sealing element (4).

2. A multi-stage control valve according to claim 1, wherein: The sealing element (4) comprises a first sealing ring (41), the end of the cylinder (3) close to the first sealing ring (41) is provided with a sealing groove (31), the second sealing ring (32) is fixedly installed in the sealing groove (31), when the first sealing ring (41) is connected with the cylinder (3), the first sealing ring (41) enters the sealing groove (31) and is tightly sealed with the second sealing ring (32).

3. A multi-stage control valve according to claim 2, wherein: The first sealing ring (41) is provided with a first guide inclined surface (411), the second sealing ring (32) is provided with a second guide inclined surface (321), when the first sealing ring (41) enters the sealing groove (31), the first sealing ring (41) is guided by the first guide inclined surface (411) and the second guide inclined surface (321), so that the first sealing ring (41) is tightly sealed with the outer wall of the valve body (1).

4. The multi-stage control valve according to claim 2, wherein: The circumferential outer side of the first sealing ring (41) is fixedly provided with a plurality of sealing rings (412), when the first sealing ring (41) enters the sealing groove (31), the inner wall of the sealing groove (31) is tightly sealed with the plurality of sealing rings (412).

5. The multi-stage control valve according to claim 2, wherein: The second sealing ring (32) is fixedly connected to the end wall of the sealing groove (31) through a fixing bolt.

6. A multiple control valve according to claim 2, wherein: The cylinder (3) is slidably provided with a fixed cylinder (5), the circumferential inner side of one end of the fixed cylinder (5) is provided with a first fixing ring (51), the circumferential outer side of the other end is provided with a second fixing ring (52), the first sealing ring (41) is fixedly installed on the first fixing ring (51), the second fixing ring (52) is detachably connected with the first connecting flange (11).

7. A multiple control valve according to claim 6, wherein: A plurality of threaded columns (521) are fixedly arranged on the second fixing ring (52), a through hole matched with the threaded column (521) is formed on the first connecting flange (11).

8. A multiple control valve according to claim 6, wherein: A connecting ring (413) is arranged on the first sealing ring (41), the connecting ring (413) is fixedly connected with the first fixing ring (51) through a fixing bolt.

9. The multi-stage control valve of claim 1, wherein: The first connecting flange (11) is the liquid inlet end, the circumferential inner side of the end of the cylinder (3) away from the valve body (1) is provided with a mounting ring (33), a filter screen (331) is mounted on the mounting ring (33).

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