A non-retention fluid control device

Abstract

The utility model discloses a non-retention fluid control device, which belongs to the technical field of non-retention sampling valves. The surface of a control valve body is provided with two concentric and coaxial delivery pipes, one end of the delivery pipe is provided with a connecting flange, one end of the delivery pipe is provided with a delivery channel, the interior of the control valve body is provided with a valve chamber connected to the delivery channel, the inner wall of the valve chamber is slidably connected with a valve core, the outer side of the valve core is fixedly sleeved with a sealing sleeve, the bottom of the sealing sleeve is provided with a sealing head, and the center position of one end of the valve core is fixedly sleeved with a sealing bearing. The non-retention fluid control device not only facilitates sampling through the structure of the valve chamber, the valve core and the sampling pipe, but also can control the switch of the fluid delivery pipeline, thereby greatly increasing the application scope of the fluid control device, and through the provided threaded sleeve and the mark provided on the valve stem, it is convenient for the user to intuitively see the lifting position of the valve core, thereby greatly improving the convenience of operation.

Description

Technical Field

[0001] The utility model relates to the technical field of non-retention sampling valves, and more specifically to a non-retention fluid control device. Background Art

[0002] The non-retention fluid sampling valve is a valve used to obtain medium samples in pipelines or equipment. It is used in situations where chemical analysis of medium samples is required frequently. The non-retention fluid sampling valve only has the function of controlling the switch of the sampling tube during use, and cannot control the switch of the fluid delivery pipeline, which narrows the scope of application. In addition, the control position of the valve core cannot be intuitively seen during the use of the sampling valve, which brings certain inconveniences to the user.

[0003] For example, a non-retention sampling valve disclosed in announcement No. CN117825110A includes a valve body, an upper valve cover and a sampling bottle are respectively provided on both sides of the valve body along the medium flow direction, a nut connector is rotatably provided on the top of the upper valve cover, a handwheel is fixedly provided on the end of the nut connector away from the upper valve cover, a valve stem is threadedly provided on the bottom of the nut connector, a stopper is provided on the side wall of the valve stem to prevent the valve stem from rotating, the valve stem is slidably matched with the valve body, a medium outflow channel is opened at the inner bottom of the valve body, and the end of the valve stem away from the threaded hole penetrates the valve body and is inserted into the medium outflow channel to close the medium outflow channel.

[0004] It can be seen from the above-mentioned public scheme that the sampling valve controls the switch of the sampling by tightening the valve core and the through hole four, but cannot control the switch of the delivery channel flowing inside the control valve, which narrows the scope of application. In addition, the valve core moves up and down under the control of the valve stem, but its moving position cannot be determined intuitively, which brings certain inconvenience to the user. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a non-retention fluid control device. The non-retention fluid control device, through the structure of the valve chamber, valve core and sampling tube, makes the control valve not only convenient for sampling, but also can control the switch of the fluid delivery pipeline, thereby greatly increasing the application scope of the fluid control device. In addition, through the threaded sleeve and the markings set on the valve stem, the user can intuitively see the lifting and lowering position of the valve core, thereby greatly improving the convenience of operation.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A non-retention fluid control device comprises a control valve body, the surface of the control valve body is provided with two concentric and coaxial delivery pipes, one end of the delivery pipe is provided with a connecting flange, one end of the delivery pipe is provided with a delivery channel, the interior of the control valve body is provided with a valve chamber connected to the delivery channel, the inner wall of the valve chamber is slidably connected with a valve core, the outer side of the valve core is fixedly sleeved with a sealing sleeve, the bottom of the sealing sleeve is provided with a sealing head, the center position of one end of the valve core is fixedly sleeved with a sealing bearing, the inner ring of the sealing bearing is fixedly sleeved with a valve stem, the surface of the valve stem is connected with a threaded sleeve through a thread, and the valve A plane is provided on the surface of the rod, and a mark is provided on the surface of the plane. A rotary wheel is detachably connected to one end of the valve stem, a sampling tube is fixedly sleeved on the side of the control valve body, and a sampling bottle connector is provided at one end of the sampling tube. The non-retention fluid control device not only facilitates sampling through the structure of the valve chamber, valve core and sampling tube, but also can control the switch of the fluid delivery pipeline, greatly increasing the application scope of the fluid control device, and through the threaded sleeve and the mark set on the valve stem, the user can intuitively see the lifting position of the valve core, greatly improving the convenience of operation.

[0008] Furthermore, a plug connector is provided at one end of the valve stem, a connecting sleeve is provided at the bottom center of the rotary wheel, a slot is provided at one end of the connecting sleeve, and the inner wall of the slot is in contact and connected with the surface of the plug connector, so that the valve stem and the rotary wheel can be quickly disassembled and combined.

[0009] Furthermore, a radially symmetrical pin hole is provided on the side of the connecting sleeve, one end of the pin hole is connected to the card slot, and a positioning pin is inserted into one end of the pin hole to facilitate the installation and removal of the positioning pin.

[0010] Furthermore, the cross-sectional shapes of the plug connector and the slot are both polygonal, the side of the plug connector is provided with a radially penetrating hole, and the inner wall of the hole is in contact and connected with the surface of the positioning pin, and the polygonal plug connector and the slot ensure the rotational stability of the valve stem.

[0011] Furthermore, the marks are distributed along the length direction of the plane, the number of the marks is at least four, and the colors of the marks are different, so that the user can determine the control position of the valve core through the marks of different colors.

[0012] Furthermore, the sealing sleeve and the sealing head are both made of corrosion-resistant and wear-resistant sealing rubber. The cross-sectional shape of the sealing head is arc-shaped. The sealing sleeve is in contact and extrusion with the inner wall of the valve chamber, which can not only seal the conveying channel and the end face of the sampling tube, but also the elastic force prevents the valve core from rotating.

[0013] Furthermore, an arc-shaped groove is provided at the bottom of the valve chamber to ensure that the fluid will not be retained in the valve chamber.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) The present invention provides a valve chamber, a valve core and a sampling tube structure, so that the control valve is not only convenient for sampling, but also can control the opening and closing of the fluid delivery pipeline, thereby greatly increasing the application scope of the fluid control equipment.

[0016] (2) This solution provides a threaded sleeve and a mark on the valve stem, which allows the user to intuitively see the lifting and lowering position of the valve core, greatly improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0018] Figure 2 This is a cross-sectional view of the control valve body and the sampling tube installation structure of the utility model;

[0019] Figure 3 It is a side view of the valve stem and runner installation structure of the utility model;

[0020] Figure 4 for Figure 3 Bottom view of the connecting sleeve and the runner mounting structure.

[0021] Description of the numbers in the figure:

[0022] 1 control valve body, 11 delivery pipe, 12 connecting flange, 13 delivery channel, 14 valve chamber, 15 arc groove, 2 sampling tube, 21 sampling bottle joint, 3 valve stem, 31 plug joint, 32 plane, 33 mark, 4 threaded sleeve, 5 valve core, 51 sealing bearing, 52 sealing sleeve, 53 sealing head, 6 rotor, 61 connecting sleeve, 62 slot, 63 pin hole, 64 positioning pin. DETAILED DESCRIPTION

[0023] 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 in 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.

[0024] Example 1

[0025] See also Figure 1-4A non-retention fluid control device comprises a control valve body 1. Two concentric and coaxial delivery pipes 11 are arranged on the surface of the control valve body 1. The delivery pipes 11 are used to connect the fluid pipeline and belong to the prior art. A connecting flange 12 is arranged at one end of the delivery pipe 11. A delivery channel 13 is arranged at one end of the delivery pipe 11. A valve chamber 14 connected to the delivery channel 13 is arranged inside the control valve body 1. An arc groove 15 is arranged at the bottom of the valve chamber 14 to ensure that the fluid will not be retained in the valve chamber 14. A valve core 5 is slidably connected to the inner wall of the valve chamber 14. The valve core 5 can move up and down along the valve chamber 14. A sealing sleeve 52 is fixedly sleeved on the outer side of the valve core 5. A sealing head 53 is arranged at the bottom of the sealing sleeve 52. A sealing bearing 51 is fixedly sleeved at the center position of one end of the valve core 5. The inner ring of the sealing bearing 51 is fixedly sleeved. A valve stem 3 is fixedly sleeved, and a threaded sleeve 4 is threadedly connected to the surface of the valve stem 3. A plane 32 is provided on the surface of the valve stem 3, and marks 33 are provided on the surface of the plane 32. The marks 33 are distributed along the length direction of the plane 32. The number of marks 33 is at least four. The four marks 33 are respectively the opening and closing position marks of the delivery pipe 11 and the opening and closing position marks of the sampling tube 2, and the colors of the marks 33 are different, which is convenient for the user to determine the control position of the valve core 5 through the marks 33 of different colors. One end of the valve stem 3 is detachably connected to the runner 6, and the side of the control valve body 1 is fixedly sleeved with the sampling tube 2, and one end of the sampling tube 2 is provided with a sampling bottle connector 21. The sampling bottle connector 21 is used to install and remove the sampling bottle, which belongs to the prior art, and its composition structure and working principle are well known to those skilled in the art.

[0026] A plug connector 31 is provided at one end of the valve stem 3, and a connecting sleeve 61 is provided at the bottom center of the runner 6. A slot 62 is provided at one end of the connecting sleeve 61. The inner wall of the slot 62 is in contact with the surface of the plug connector 31, so that the valve stem 3 and the runner 6 can be quickly disassembled and assembled. A radially symmetrical pin hole 63 is provided on the side of the connecting sleeve 61. One end of the pin hole 63 is connected to the slot 62. A positioning pin 64 is inserted at one end of the pin hole 63 to facilitate the installation and disassembly of the positioning pin 64.

[0027] The cross-sectional shapes of the plug connector 31 and the card slot 62 are both polygonal. The side of the plug connector 31 is provided with a radially penetrating hole, and the inner wall of the hole is in contact and connected with the surface of the positioning pin 64. The polygonal plug connector 31 and the card slot 62 ensure the rotation stability of the valve stem 3. The sealing sleeve 52 and the sealing head 53 are both made of corrosion-resistant and wear-resistant sealing rubber. The cross-sectional shape of the sealing head 53 is arc-shaped. The sealing sleeve 52 is in contact and extrusion with the inner wall of the valve chamber 14, which can not only seal the delivery channel 13 and the end face of the sampling tube 2, but also the elastic force prevents the valve core 5 from rotating.

[0028] When sampling, the non-retention fluid control device first fixes the sampling bottle through the sampling bottle connector 21, and then rotates the wheel 6 counterclockwise. The counterclockwise rotation of the wheel 6 causes the valve stem 3 to move upward under the action of the thread. The upward movement of the valve stem 3 drives the valve core 5 to move upward to open the opening at one end of the sampling tube 2, so that the fluid in the valve chamber 14 enters the sampling tube 2 and is then collected into the sampling bottle. At the same time, it will not affect the delivery of the fluid in the delivery channel 13. Through the structure of the valve chamber 14, the valve core 5 and the sampling tube 2, the control valve is not only convenient for sampling, but also can control the switch of the fluid delivery pipeline, which greatly increases the application scope of the fluid control device. In addition, through the threaded sleeve 4 and the mark 33 set on the valve stem 3, the user can intuitively see the lifting position of the valve core 3, which greatly improves the convenience of operation.

[0029] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A non-retention fluid control device, comprising a control valve body (1), wherein the surface of the control valve body (1) is provided with two concentric and coaxial delivery pipes (11), one end of the delivery pipe (11) is provided with a connecting flange (12), and one end of the delivery pipe (11) is provided with a delivery channel (13), characterized in that: The control valve body (1) is provided with a valve chamber (14) in communication with the delivery channel (13) inside, the inner wall of the valve chamber (14) is slidably connected with a valve core (5), the outer side of the valve core (5) is fixedly sleeved with a sealing sleeve (52), the bottom of the sealing sleeve (52) is provided with a sealing head (53), a sealing bearing (51) is fixedly sleeved at the center position of one end of the valve core (5), the inner ring of the sealing bearing (51) is fixedly sleeved with a valve stem (3), the surface of the valve stem (3) is connected with a threaded sleeve (4) through a thread, the surface of the valve stem (3) is provided with a plane (32), the surface of the plane (32) is provided with a mark (33), one end of the valve stem (3) is detachably connected with a rotating wheel (6), a sampling tube (2) is fixedly sleeved on the side of the control valve body (1), and one end of the sampling tube (2) is provided with a sampling bottle connector (21).

2. A non-retention fluid control device according to claim 1, characterized in that: A plug connector (31) is provided at one end of the valve stem (3), a connecting sleeve (61) is provided at the bottom center of the rotating wheel (6), a clamping groove (62) is provided at one end of the connecting sleeve (61), and an inner wall of the clamping groove (62) is in contact and connection with the surface of the plug connector (31).

3. A non-retention fluid control device according to claim 2, characterized in that: A radially symmetrical pin hole (63) is provided on the side surface of the connecting sleeve (61), one end of the pin hole (63) is connected to the clamping groove (62), and a positioning pin (64) is inserted into one end of the pin hole (63).

4. A non-retention fluid control device according to claim 2, characterized in that: The cross-sectional shapes of the plug connector (31) and the slot (62) are both polygonal, and a radially penetrating hole is provided on the side surface of the plug connector (31), and the inner wall of the hole is in contact with and connected to the surface of the positioning pin (64).

5. The non-retention fluid control device according to claim 1, characterized in that: The marks (33) are distributed along the length direction of the plane (32), the number of the marks (33) is at least four, and the colors of the marks (33) are different.

6. A non-retention fluid control device according to claim 1, characterized in that: The sealing sleeve (52) and the sealing head (53) are both made of corrosion-resistant and wear-resistant sealing rubber, and the cross-sectional shape of the sealing head (53) is arc-shaped.

7. The non-retention fluid control device according to claim 1, characterized in that: The bottom of the valve chamber (14) is provided with an arc-shaped groove (15).

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