Sampling valve

Abstract

The utility model discloses a sampling valve which comprises a valve body and a valve cover, the valve cover is connected to the top of the valve body in a threaded mode, a sampling inlet is formed in the bottom of the valve body, a sampling outlet and a cleaning connector are formed in the positions right opposite to the outer circumferential face of the valve body, and a cavity is formed in the upper surface of the valve body. The valve rod is driven to move upwards by rotating the hand wheel assembly, so that the valve clack moves upwards to be separated from the boss, the second sealing gasket is separated from the boss, the sampling inlet is further communicated with the sampling outlet, sample liquid flows to the sampling outlet through the sampling inlet, and the sampling liquid flows to the cleaning interface through the cleaning interface. The liquid taking valve is opened, a sample to be taken is stored in a prepared container, sampling of the sample is completed, the liquid taking valve is closed after sampling is completed, the second sealing gasket is clamped to the bottom of the valve clack to be matched with the boss, the valve clack does not make direct contact with the interior of the valve body, abrasion of the valve clack is effectively reduced, and then the service life of the valve clack is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, especially take a kind of sampling valve. BACKGROUND

[0002] Sampling valve generally includes valve body, sampling inlet and sampling outlet are set on valve body, middle cavity for connecting sampling inlet and sampling outlet is equipped in valve body, the valve cavity is set in the axial direction above sampling outlet and is equipped with cleaning blow interface, the other end of the axial direction of middle cavity is inserted with valve stem corresponding sampling inlet, hand wheel is equipped on the axial outer end of valve stem, sealing pad, which can form closure to sampling inlet, is equipped in middle cavity, the sampling outlet is equipped with control valve.

[0003] However, the bottom of valve disc frequently contacts with boss when the existing sampling valve is opened and closed, the peripheral surface of valve disc rubs with the opening of valve body, which can easily cause the abrasion of valve disc, leading to poor sealing performance, affecting the service life of sampling valve, and when the valve disc slides up and down, the outer circumferential surface thereof does not fit tightly with the connection of sampling outlet and cleaning blow interface, which can easily cause the leakage and backflow of sampling liquid, affecting the sampling accuracy.

[0004] Therefore, it is necessary to provide a sampling valve to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model is aimed at providing a sampling valve to solve the problems in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a sampling valve, including valve body and valve cover, the valve cover is connected in screw thread on the top of valve body, the bottom of valve body is equipped with sampling inlet, the position of outer circumferential surface of valve body is equipped with sampling outlet and cleaning interface, the upper surface of valve body is equipped with cavity, the sampling inlet, sampling outlet, cleaning interface and cavity are interconnected, the cavity is equipped opposite sampling inlet, and the connecting place of the two forms boss, one end of sampling outlet is provided with liquid valve, the valve stem is rotatably arranged in the cavity, the recess is formed in the top of valve body, the first sealing gasket is clamped in the recess, the first sealing gasket is sleeved on the outer circumferential surface of lower end of valve cover, the upper end of valve stem extends to the upper side of valve cover and penetrates valve cover, the valve cap is connected in screw thread on the top of valve cover, the copper nut combination is arranged on the top of valve cap, the adjusting column is connected in screw thread on the top of copper nut combination, the valve stem is inserted in the adjusting column, the adjusting column extends to the upper side of copper nut combination and penetrates copper nut combination on the top, the hand wheel combination is fixedly connected on the top of adjusting column, the valve disc is arranged on the bottom of valve stem, the bottom of valve disc is equipped with clamping groove, the second sealing gasket is clamped in the clamping groove, the connecting place of sampling outlet and cleaning interface and cavity all forms the structure of conical frustum, the outer circumferential surface of valve disc cooperates with the structure of conical frustum of sampling outlet and cleaning interface outlet and seals the channel.

[0007] As a preferred technical scheme of the utility model, the valve cover is internally provided with a V-shaped packing, a packing pressing sleeve is arranged on the top of the V-shaped packing, an O-shaped ring is arranged between the V-shaped packing and the packing pressing sleeve, the V-shaped packing, the O-shaped ring and the packing pressing sleeve are all sleeved on the outer circumferential surface of the valve rod, and the lower end of the valve cap is tightly pressed on the upper surface of the packing pressing sleeve.

[0008] As a preferred technical scheme of the utility model, a plurality of bolts are uniformly inserted on the lower end disc of the copper nut combination, and the lower end of each bolt penetrates the copper nut combination and is screwed into the valve cap.

[0009] As a preferred technical scheme of the utility model, a slot is formed on the top of the valve disc, the bottom of the valve rod is inserted into the slot, a clamping groove is formed on the outer circumferential surface of the lower end of the valve rod, an open ring is arranged in the clamping groove, a valve disc pressing cover is inserted into the top of the slot of the valve disc, the lower end of the valve disc pressing cover is tightly pressed on the top of the open ring, and a retreat-stop washer is arranged at the joint between the valve disc pressing cover and the top of the valve disc.

[0010] As a preferred technical scheme of the utility model, a stud is arranged on the bottom of the valve disc, a nut is threadedly connected to the stud, and a flat washer is arranged between the nut and the second sealing gasket.

[0011] As a preferred technical scheme of the utility model, an open pin is inserted on the stud.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] The utility model discloses a sampling valve, the utility model discloses a sampling inlet is communicated with external sample storage tank, rotates hand wheel combination and drives the adjusting column to rotate and go up in copper nut combination, the adjusting column drives the valve rod to go up, makes the valve disc go up and separates from the boss, and the second sealing gasket separates from the boss, and then the sampling inlet and sampling outlet are communicated, and sample liquid flows to the sampling outlet through the sampling inlet, and the sample to be taken is stored in the prepared container by opening the liquid taking valve, and the sampling of the sample is completed, and the liquid taking valve is closed after sampling is completed, and the cavity of the valve body and the sampling inlet and the sampling outlet are cleaned through the cleaning interface and the external cleaning equipment, so that the influence of the residual sample in the valve body on the subsequent sampling is effectively prevented, the second sealing gasket is clamped on the bottom of the valve disc and cooperates with the boss, so that the valve disc does not directly contact the inside of the valve body, the wear of the valve disc is effectively reduced, and the service life of the valve disc is prolonged, the sampling inlet and the sampling outlet are closed by the second sealing gasket tightly pressing the boss, the sealing effect is good, the valve disc is closely attached to the sampling outlet and the cleaning interface in the sliding process, until the lower end of the valve disc is separated from the two, liquid can flow into the sampling outlet from the sampling inlet, the sampling precision is guaranteed, and the valve disc is reset and tightly attached to the conical table connecting portion of the sampling outlet and the cavity after sampling is completed, so that the backflow of liquid is effectively prevented. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Fig. 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Fig. 2 This is a partial structural schematic diagram of the present invention;

[0017] Fig. 3 This is an enlarged view of section A of this utility model.

[0018] In the diagram: 1. Valve body; 101. Sampling inlet; 102. Sampling outlet; 103. Cleaning interface; 104. Cavity; 105. Boss; 2. Valve stem; 3. Valve cap; 4. Packing gland; 5. Handwheel assembly; 6. Copper nut assembly; 7. Bolt; 8. O-ring; 9. V-packing; 10. Valve cover; 11. First sealing gasket; 12. Flat washer; 13. Second sealing gasket; 14. Valve disc gland; 15. Anti-reverse washer; 16. Split ring; 17. Nut; 18. Cotter pin; 19. Valve disc; 20. Liquid extraction valve; 21. Adjusting column. Detailed Implementation

[0019] The embodiments of this utility model will now be described with reference to the accompanying drawings. In this process, to ensure clarity and convenience, we may exaggerate the width of lines or the size of constituent elements in the drawings.

[0020] Furthermore, the terms used below are defined based on the functions of this utility model and may vary depending on the user's or operator's intent or convention. Therefore, these terms are defined based on the entire contents of this specification.

[0021] like Figs. 1 to 3 As shown, a sampling valve includes a valve body 1 and a valve cover 10. A sampling inlet 101 is provided at the bottom of the valve body 1. A sampling outlet 102 and a cleaning interface 103 are provided at positions directly opposite each other on the outer circumference of the valve body 1. A cavity 104 is provided on the upper surface of the valve body 1. The sampling inlet 101, sampling outlet 102, cleaning interface 103 and cavity 104 are interconnected. The cavity 104 is directly opposite the sampling inlet 101, and a boss 105 is formed at the connection between the two. The sampling outlet 102 and the cleaning interface 103 are both frustoconical structures at the connection with the cavity 104. A liquid extraction valve 20 is provided at one end of the sampling outlet 102. By opening the liquid extraction valve 20, the collected sample is stored in a suitable container.

[0022] The valve stem 2 is arranged in rotation in the cavity 104, the valve cover 10 is threadedly connected at the top of the valve body 1, a groove is formed in the top of the valve body 1, a first sealing gasket 11 is clamped in the groove, the first sealing gasket 11 is sleeved on the outer circumferential surface of the lower end of the valve cover 10, the connection between the valve cover 10 and the valve body 1 is sealed by the first sealing gasket 11, the upper end of the valve stem 2 extends through the valve cover 10 to above the valve cover 10, a V-shaped packing 9 is arranged in the valve cover 10, a packing pressing sleeve 4 is arranged at the top of the V-shaped packing 9, an O-shaped ring 8 is arranged between the V-shaped packing 9 and the packing pressing sleeve 4, the V-shaped packing 9, the O-shaped ring 8 and the packing pressing sleeve 4 are all sleeved on the outer circumferential surface of the valve stem 2, a valve cap 3 is threadedly connected at the top of the valve cover 10, the lower end of the valve cap 3 is pressed against the upper surface of the packing pressing sleeve 4, a copper nut assembly 6 is arranged at the top of the valve cap 3, a plurality of bolts 7 are uniformly inserted in the disc at the lower end of the copper nut assembly 6, the lower ends of the bolts 7 penetrate through the copper nut assembly 6 and are screwed into the valve cap 3 to lock and fix the copper nut assembly 6 and the valve cap 3, an adjusting column 21 is threadedly connected at the top of the copper nut assembly 6, the valve stem 2 is inserted into the adjusting column 21, the adjusting column 21 extends through the copper nut assembly 6 to above the copper nut assembly 6, a hand wheel assembly 5 is fixedly connected at the top of the adjusting column 21, the adjusting column 21 is rotated by the hand wheel assembly 5 to drive the valve stem 2 to rotate and move up and down.

[0023] The valve stem 2 is arranged in rotation in the cavity 104, the valve cover 10 is threadedly connected at the top of the valve body 1, a groove is formed in the top of the valve body 1, a first sealing gasket 11 is clamped in the groove, the first sealing gasket 11 is sleeved on the outer circumferential surface of the lower end of the valve cover 10, the connection between the valve cover 10 and the valve body 1 is sealed by the first sealing gasket 11, the upper end of the valve stem 2 extends through the valve cover 10 to above the valve cover 10, a V-shaped packing 9 is arranged in the valve cover 10, a packing pressing sleeve 4 is arranged at the top of the V-shaped packing 9, an O-shaped ring 8 is arranged between the V-shaped packing 9 and the packing pressing sleeve 4, the V-shaped packing 9, the O-shaped ring 8 and the packing pressing sleeve 4 are all sleeved on the outer circumferential surface of the valve stem 2, a valve cap 3 is threadedly connected at the top of the valve cover 10, the lower end of the valve cap 3 is pressed against the upper surface of the packing pressing sleeve 4, a copper nut assembly 6 is arranged at the top of the valve cap 3, a plurality of bolts 7 are uniformly inserted in the disc at the lower end of the copper nut assembly 6, the lower ends of the bolts 7 penetrate through the copper nut assembly 6 and are screwed into the valve cap 3 to lock and fix the copper nut assembly 6 and the valve cap 3, an adjusting column 21 is threadedly connected at the top of the copper nut assembly 6, the valve stem 2 is inserted into the adjusting column 21, the adjusting column 21 extends through the copper nut assembly 6 to above the copper nut assembly 6, a hand wheel assembly 5 is fixedly connected at the top of the adjusting column 21, the adjusting column 21 is rotated by the hand wheel assembly 5 to drive the valve stem 2 to rotate and move up and down.

[0024] The embodiment is specific, through the sampling inlet 101 and the external sample storage tank are connected, the rotating handle combination 5 drives the adjusting column 21 to rotate and move up in the copper nut combination 6, the adjusting column 21 drives the valve stem 2 to move up, so that the valve flap 19 moves up and separates from the boss 105, the second sealing gasket 13 separates from the boss 105, and then the sampling inlet 101 and the sampling outlet 102 are communicated, the sample liquid flows to the sampling outlet 102 through the sampling inlet 101, the liquid sampling valve 20 is opened, and the sample to be taken is stored in the prepared container, the sampling of the sample is completed, the liquid sampling valve 20 is closed after the sampling is completed, the cavity 104 of the valve body 1 and the sampling inlet 101 and the sampling outlet 102 are cleaned through the cleaning interface 103 and the external cleaning equipment, which effectively prevents the residual sample in the valve body 1 from affecting the subsequent sampling, the second sealing gasket 13 is clamped at the bottom of the valve flap 19 and cooperates with the boss 105, so that the valve flap 19 does not directly contact the inside of the valve body 1, which effectively reduces the wear of the valve flap 19 and prolongs the service life of the valve flap 19, the sampling inlet 101 and the sampling outlet 102 are closed by the second sealing gasket 13 pressing the boss 105, the sealing effect is good, the valve flap 19 is closely attached to the sampling outlet 102 and the cleaning interface 103 in the sliding process, until the lower end of the valve flap 19 separates from them, and then the liquid can flow from the sampling inlet 101 to the sampling outlet 102, which ensures the sampling accuracy, and when the sampling is completed, the valve flap 19 is reset and closely attached to the conical connection between the sampling outlet 102 and the cavity 104, which effectively prevents the backflow of the liquid.

[0025] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A sampling valve, comprising a valve body (1) and a valve cover (10), wherein the valve cover (10) is threadedly connected to the top of the valve body (1), characterized in that: The valve body (1) has a sampling inlet (101) at its bottom, a sampling outlet (102) and a cleaning interface (103) at the position directly opposite the outer circumference of the valve body (1), and a cavity (104) on the upper surface of the valve body (1). The sampling inlet (101), sampling outlet (102), cleaning interface (103) and cavity (104) are interconnected. The cavity (104) is directly opposite to the sampling inlet (101), and a boss (105) is formed at the connection between the two. A liquid sampling valve (20) is provided at one end of the sampling outlet (102). A valve stem (2) is rotatably installed in the cavity (104). A groove is provided at the top of the valve body (1), and a first sealing gasket (11) is snapped into the groove. The first sealing gasket (11) is sleeved on the lower outer circumference of the valve cover (10). The upper end of the valve stem (2) penetrates the valve cover (10). Extending upwards, the valve cover (10) is threaded with a valve cap (3), the valve cap (3) is provided with a copper nut assembly (6) on top, the copper nut assembly (6) is threaded with an adjusting column (21) on top, the valve stem (2) is inserted into the adjusting column (21) on top, the adjusting column (21) extends upwards through the copper nut assembly (6) on top, the adjusting column (21) is fixedly connected with a handwheel assembly (5) on top, the valve stem (2) is provided with a valve disc (19) at the bottom, the valve disc (19) has a snap-fit ​​groove at the bottom, the snap-fit ​​groove is snapped with a second sealing gasket (13), the sampling outlet (102) and the cleaning interface (103) are connected to the cavity (104) to form a frustum-shaped structure, the outer circumferential surface of the valve disc (19) cooperates with the frustum-shaped structure at the sampling outlet (102) and the cleaning interface (103) to close the channel.

2. A sampling valve according to claim 1, characterized in that: The valve cover (10) is provided with a V-shaped packing (9), and a packing sleeve (4) is provided on the top of the V-shaped packing (9). An O-ring (8) is provided between the V-shaped packing (9) and the packing sleeve (4). The V-shaped packing (9), the O-ring (8) and the packing sleeve (4) are all fitted on the outer circumferential surface of the valve stem (2). The lower middle part of the valve cap (3) is pressed against the upper surface of the packing sleeve (4).

3. A sampling valve according to claim 1, characterized in that: Multiple bolts (7) are evenly inserted on the lower disc of the copper nut assembly (6), and the lower ends of the bolts (7) penetrate the copper nut assembly (6) and screw into the valve cap (3).

4. A sampling valve according to claim 1, characterized in that: The valve disc (19) has a slot at the top, the valve stem (2) is inserted into the slot at the bottom, the valve stem (2) has a groove on the outer circumference of the lower end, a split ring (16) is provided in the groove, a valve disc cap (14) is inserted into the top of the slot of the valve disc (19), the lower end of the valve disc cap (14) is pressed against the top of the split ring (16), and a backstop washer (15) is provided at the connection between the valve disc cap (14) and the top of the valve disc (19).

5. A sampling valve according to claim 1, characterized in that: The valve disc (19) has a stud at the bottom, and a nut (17) is threaded onto the stud. A flat washer (12) is provided between the nut (17) and the second sealing gasket (13).

6. A sampling valve according to claim 5, characterized in that: A cotter pin (18) is inserted into the stud.

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