Sampling group valve based on flange connection

Abstract

The utility model discloses a sampling group valve based on flange connection, which comprises a main valve body, an inlet flow channel, a middle cavity and an outlet flow channel which are communicated in sequence are arranged in the main valve body, and a sampling flow channel used for being communicated with the middle cavity is arranged on the side portion of the main valve body. The main valve body is further provided with a main stop valve, a secondary stop valve and a needle valve which are used for controlling the inlet flow channel, the outlet flow channel and the sampling flow channel to be connected and disconnected respectively, and the two ends of the main valve body are each provided with a connecting flange. The flange structure base body design is adopted, the flange structure base body and a device pipeline flange are installed in an embedded mode in the installation process, the structure has the advantage of being small in occupied space, and installation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a sampling group valve based on flange connection. Background Art

[0002] A sampling valve is a valve used to obtain a medium sample in a pipeline or equipment. In many occasions where chemical analysis of the medium sample is often required, a special sampling valve is mostly used. Most of the sampling and discharging group valves used in the existing market adopt an external connection structure design, which has the defect of large occupied space. Content of the Utility Model

[0003] The purpose of the utility model is to provide a sampling group valve based on flange connection. The utility model adopts a flange structure matrix design, and is embedded and installed with the flange of the device pipeline during installation, which has the advantages of small occupied space of the structure and is more convenient for installation.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: A sampling group valve based on flange connection, including a main valve body. An inlet flow channel, an intermediate cavity and an outlet flow channel are sequentially communicated in the main valve body. A sampling flow channel for communicating with the intermediate cavity is arranged on the side of the main valve body. A main stop valve, a secondary stop valve and a needle valve for controlling the on-off of the inlet flow channel, the outlet flow channel and the sampling flow channel respectively are also installed on the main valve body. A connecting flange is respectively arranged at both ends of the main valve body.

[0005] By adopting the above technical scheme, a flange structure matrix design is adopted, and each functional valve and the sampling flow channel are respectively arranged in the circumferential direction of the flange-type main body; the main stop valve, the needle valve and the secondary stop valve can work simultaneously to control and regulate the flowing medium, meeting different needs of customers; the main stop valve is arranged at the front end of the flow channel, and can control and regulate the total amount of the flowing medium, meeting the needs of regulation, cut-off and discharge, and improving the regulation efficiency; due to the adoption of the flange structure matrix design, it is embedded and installed with the flange of the device pipeline during installation, which has the advantages of small occupied space of the structure and is more convenient for installation.

[0006] The utility model is further arranged that the main stop valve and the secondary stop valve have the same structure. The main stop valve includes a main valve module and a valve stem. An installation cavity with a rectangular cross-section is arranged at the bottom of the main valve body, and the installation cavity is communicated with the inlet flow channel. The main valve module is arranged in the installation cavity. The main valve module includes a valve block with a rectangular cross-section. The valve block is in the shape of a middle hole with two open ends. A sphere is arranged in the valve block, and a valve seat for forming a sealing fit with the sphere is respectively installed at the positions corresponding to both ends of the sphere in the valve block. A first shaft hole is arranged at the upper end of the main valve body, and a second shaft hole is arranged at the upper end of the valve block. The valve stem sequentially penetrates through the first shaft hole and the second shaft hole and is linked with the sphere. An O-ring for forming a sealing fit with the valve stem is also arranged on the inner wall of the first shaft hole.

[0007] By adopting the above technical solution, the main stop valve and the secondary stop valve have the same structure and adopt a modular structure, which is very convenient for disassembly and assembly.

[0008] The utility model is further configured that two ends of the valve block are respectively threadedly connected with a threaded pressing ring, and the inner end of the threaded pressing ring is tightly pressed against the outer end of the valve seat, so that the valve seat and the ball are tightly fitted.

[0009] By adopting the above technical solution, the two valve seats can be pressed against the two ends of the ball by tightening the threaded pressing rings at both ends, and the assembly is very convenient.

[0010] The utility model is further configured that the outer end of the threaded pressing ring is evenly provided with a plurality of operating grooves along the circumferential direction.

[0011] By adopting the above technical solution, a fulcrum can be provided for the user, facilitating the rotation operation of the threaded pressing ring.

[0012] The utility model is further configured that two ends of the valve block are respectively provided with a first sealing ring for forming a sealing fit with the inner wall of the installation cavity.

[0013] By adopting the above technical solution, the sealing between the valve block and the installation cavity can be ensured, and the medium can be prevented from leaking out from the gap between the two.

[0014] The utility model is further configured as follows: a threaded groove is provided at the bottom of the valve block, and a lower shaft hole connected to the interior of the valve block is provided at the inner end of the threaded groove; a support cover is threadedly connected to the threaded groove, and an inner hexagonal groove is provided at the outer end of the support cover; a limiting sleeve is provided at the inner end of the support cover; a support shaft is passed through the lower shaft hole, and a second sealing ring is provided at the outer periphery of the support shaft for sealingly fitting with the inner wall of the lower shaft hole; the lower end of the support shaft is arranged in the limiting sleeve, and the lower end of the sphere is provided with a rotating groove for embedding the upper end of the support shaft.

[0015] By adopting the above technical solution, not only can the ball be supported and its installation stability be improved, but it can also be positioned to facilitate the subsequent matching connection with the valve stem.

[0016] The utility model is further configured that the lower end of the valve block is provided with a protrusion for clamping a tool.

[0017] By adopting the above technical solution, during disassembly, the main valve module can be completely pulled out by clamping the protrusion with a tool and pulling it downward, which facilitates the disassembly operation.

[0018] The present utility model is further configured such that the main stop valve further includes a locking assembly for locking the main valve module in the installation cavity. The locking assembly includes a three-opening ring and a plurality of locking screws. An outer circular groove is provided at the lower end of the installation cavity, and an annular clamping groove is provided on the inner wall of the outer circular groove. The three-opening ring is clamped on the annular clamping groove, and a plurality of screw holes are provided on the three-opening ring. The locking screws are threadedly connected to the corresponding screw holes, and the upper ends of the locking screws abut against the bottom of the valve block.

[0019] By adopting the above technical solution, tightening the locking screws can lock the main valve module and ensure its firm installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a first-direction cross-sectional view of the whole of the present utility model;

[0021] Figure 2 is a second-direction cross-sectional view of the whole of the present utility model;

[0022] Figure 3 is Figure 1 an enlarged structural schematic diagram of part A in

[0023] In the figure: 1, main valve body; 2, inlet flow channel; 3, intermediate cavity; 4, outlet flow channel; 5, sampling flow channel; 6, main stop valve; 7, secondary stop valve; 8, needle valve; 9, connecting flange; 10, main valve module; 11, valve stem; 12, installation cavity; 13, valve block; 14, valve seat; 15, first shaft hole; 16, second shaft hole; 17, O-ring; 18, threaded retaining ring; 19, operation groove; 20, first sealing ring; 21, threaded groove; 22, lower shaft hole; 23, support cover; 24, hexagon socket; 25, limit sleeve; 26, support shaft; 27, second sealing ring; 28, rotation groove; 29, convex block; 30, locking assembly; 31, three-opening ring; 32, locking screw; 33, outer circular groove; 34, annular clamping groove; 35, screw hole; 36, sphere. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all 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 shall fall within the protection scope of the present utility model.

[0025] Embodiment: As shown in the attached Figures 1 to 3A sampling group valve based on flange connection is shown, which includes a main valve body 1. An inlet flow channel 2, an intermediate cavity 3, and an outlet flow channel 4 are sequentially communicated inside the main valve body 1. A sampling flow channel 5 for communicating with the intermediate cavity 3 is provided on the side of the main valve body 1. A main stop valve 6, a secondary stop valve 7, and a needle valve 8 for controlling the on-off of the inlet flow channel 2, the outlet flow channel 4, and the sampling flow channel 5 are respectively installed on the main valve body 1. The needle valve 8 has a conventional structure. Connection flanges 9 are respectively provided at both ends of the main valve body 1, and a plurality of mounting holes are circumferentially provided on the connection flanges 9. The flange structure matrix design is adopted, and each functional valve and the sampling flow channel 5 are respectively arranged in the circumferential direction of the flange-type main body; the main stop valve 6, the needle valve, and the secondary stop valve 7 can work simultaneously to control and regulate the flowing medium, meeting different needs of customers; the main stop valve 6 is arranged at the front end of the flow channel, and can control and regulate the total amount of the flowing medium, meeting the needs of regulation, cut-off, and discharge, improving the regulation efficiency; due to the adoption of the flange structure matrix design, it is embedded and installed with the device pipeline flange during installation, having the advantage of small structural occupied space and being more convenient for installation.

[0026] As shown in the attached Figure 1 and the attached Figure 3 As shown, the main stop valve 6 and the secondary stop valve 7 have the same structure. The main stop valve 6 includes a main valve module 10 and a valve stem 11. An installation cavity 12 with a rectangular cross-section is provided at the bottom of the main valve body 1, and the installation cavity 12 is communicated with the inlet flow channel 2. The main valve module 10 is arranged in the installation cavity 12. The main valve module 10 includes a valve block 13 with a rectangular cross-section. The valve block 13 has a cubic structure. The valve block 13 has a middle hole and both ends are open. A sphere 36 is arranged inside the valve block 13, and a valve seat 14 for forming a sealing fit with the sphere 36 is respectively installed at positions corresponding to both ends of the sphere 36 inside the valve block 13. A first shaft hole 15 is provided at the upper end of the main valve body 1, and a second shaft hole 16 is provided at the upper end of the valve block 13. The valve stem 11 sequentially passes through the first shaft hole 15 and the second shaft hole 16 and is linked with the sphere 36. An O-ring 17 for forming a sealing fit with the valve stem 11 is further provided on the inner wall of the first shaft hole 15. The main stop valve 6 and the secondary stop valve 7 have the same structure and adopt a modular structure, which is very convenient for disassembly and assembly.

[0027] As shown in the attached Figure 3 As shown, a threaded retaining ring 18 is respectively threadedly connected to both ends of the valve block 13. The outer circumference of the threaded retaining ring 18 has an external thread. The inner end of the threaded retaining ring 18 abuts against the outer end of the valve seat 14, so that the valve seat 14 is closely attached to the sphere 36. By tightening the threaded retaining rings 18 at both ends, the two valve seats 14 can be respectively abutted against both ends of the sphere 36, and the assembly is very convenient.

[0028] As shown in the attached Figure 3As shown, the outer end of the threaded pressing ring 18 is evenly provided with a plurality of operating grooves 19 along the circumferential direction. This design can provide a point of force for the user, making it easy to rotate the threaded pressing ring 18.

[0029] As attached Figure 3 As shown, a first sealing ring 20 for sealing with the inner wall of the installation cavity 12 is respectively installed at both ends of the valve block 13. This design can ensure the sealing between the valve block 13 and the installation cavity 12, and prevent the medium from leaking from the gap between the two.

[0030] As attached Figure 3 As shown, the bottom of the valve block 13 is also provided with a thread groove 21, and the inner end of the thread groove 21 is also provided with a lower shaft hole 22 connected to the inside of the valve block 13, and the thread groove 21 is internally threaded with a support cover 23, and the outer end of the support cover 23 is provided with an inner hexagonal groove 24, and the inner end of the support cover 23 is provided with a limit sleeve 25, and the lower shaft hole 22 is penetrated by a support shaft 26, and the outer periphery of the support shaft 26 is provided with a second sealing ring 27 for forming a sealing match with the inner wall of the lower shaft hole 22, and the lower end of the support shaft 26 is arranged in the limit sleeve 25, and the lower end of the ball 36 is provided with a rotation groove 28 for the upper end of the support shaft 26 to be embedded. This design can not only provide support for the ball 36 and improve its installation stability, but also position it, which is conducive to the subsequent matching connection with the valve stem 11.

[0031] As attached Figure 3 As shown, the lower end of the valve block 13 is provided with a protrusion 29 for tool clamping, and the protrusion 29 can be welded to the bottom of the valve block 13. When disassembling, the main valve module 10 can be pulled outward by clamping the protrusion 29 with a tool and pulling it downward, which is convenient for disassembly.

[0032] As attached Figure 3 As shown, the main stop valve 6 also includes a locking assembly 30 for locking the main valve module 10 in the installation cavity 12, the locking assembly 30 includes three open rings 31 and multiple locking screws 32, the lower end of the installation cavity 12 is provided with an outer circular groove 33, the inner wall of the outer circular groove 33 is provided with an annular clamping groove 34, the three open rings 31 are clamped on the annular clamping groove 34, and the three open rings 31 are provided with multiple screw holes 35, the locking screws 32 are threadedly connected in the corresponding screw holes 35, and the upper end of the locking screws 32 is tightly against the bottom of the valve block 13. Tightening the locking screws 32 can lock the main valve module 10 to ensure the firmness of its installation.

Claims

1. A sampling valve assembly based on flange connection, characterized in that: The invention comprises a main valve body (1), wherein the main valve body (1) is provided with an inlet flow channel (2), an intermediate cavity (3) and an outlet flow channel (4) which are connected in sequence, and a sampling flow channel (5) which is connected to the intermediate cavity (3) is provided on the side of the main valve body (1). A main stop valve (6), a secondary stop valve (7) and a needle valve (8) which are respectively used to control the opening and closing of the inlet flow channel (2), the outlet flow channel (4) and the sampling flow channel (5) are also installed on the main valve body (1), and a connecting flange (9) is provided at each end of the main valve body (1).

2. A flange-connected sampling valve assembly according to claim 1, characterized in that: The main stop valve (6) and the secondary stop valve (7) have the same structure. The main stop valve (6) comprises a main valve module (10) and a valve stem (11). The bottom of the main valve body (1) is provided with a mounting cavity (12) with a rectangular cross section. The mounting cavity (12) is connected to the inlet flow channel (2). The main valve module (10) is arranged in the mounting cavity (12). The main valve module (10) comprises a valve block (13) with a rectangular cross section. The valve block (13) is in the shape of a central hole and openings at both ends. A ball (36) is arranged in the valve block (13). ), and a valve seat (14) for sealing with the ball (36) is respectively installed at the positions corresponding to the two ends of the ball (36) in the valve block (13), the upper end of the main valve body (1) is provided with a first axial hole (15), the upper end of the valve block (13) is provided with a second axial hole (16), the valve stem (11) passes through the first axial hole (15) and the second axial hole (16) in sequence, and is linked to the ball (36), and the inner wall of the first axial hole (15) is also provided with an O-ring (17) for sealing with the valve stem (11).

3. A flange-connected sampling valve assembly according to claim 2, characterized in that: The two ends of the valve block (13) are respectively threadedly connected with a threaded pressing ring (18), and the inner end of the threaded pressing ring (18) is tightly pressed against the outer end of the valve seat (14), so that the valve seat (14) and the ball (36) are tightly fitted.

4. A flange-connected sampling valve assembly according to claim 3, characterized in that: The outer end of the threaded pressing ring (18) is evenly provided with a plurality of operating grooves (19) along the circumferential direction.

5. The flange-connected sampling valve assembly according to claim 2, characterized in that: A first sealing ring (20) for forming a sealing fit with the inner wall of the installation cavity (12) is respectively installed at both ends of the valve block (13).

6. A flange-connected sampling valve assembly according to claim 2, characterized in that: The bottom of the valve block (13) is also provided with a thread groove (21), the inner end of the thread groove (21) is also provided with a lower shaft hole (22) connected to the inside of the valve block (13), the thread groove (21) is internally threadedly connected with a support cover (23), the outer end of the support cover (23) is provided with an inner hexagonal groove (24), the inner end of the support cover (23) is provided with a limit sleeve (25), a support shaft (26) is passed through the lower shaft hole (22), the outer periphery of the support shaft (26) is provided with a second sealing ring (27) for forming a sealing fit with the inner wall of the lower shaft hole (22), the lower end of the support shaft (26) is arranged in the limit sleeve (25), and the lower end of the ball (36) is provided with a rotation groove (28) for embedding the upper end of the support shaft (26).

7. The flange-connected sampling valve assembly according to claim 2, characterized in that: The lower end of the valve block (13) is provided with a convex block (29) for clamping a tool.

8. The flange-connected sampling valve assembly according to claim 2, characterized in that: The main stop valve (6) also includes a locking assembly (30) for locking the main valve module (10) in the installation cavity (12), the locking assembly (30) including three open rings (31) and a plurality of locking screws (32), the lower end of the installation cavity (12) is provided with an outer circular groove (33), the inner wall of the outer circular groove (33) is provided with an annular groove (34), the three open rings (31) are clamped on the annular groove (34), and the three open rings (31) are provided with a plurality of screw holes (35), the locking screws (32) are threadedly connected to the corresponding screw holes (35), and the upper end of the locking screws (32) is tightly abutted against the bottom of the valve block (13).

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