Visual hard sealing sampling valve

Abstract

The utility model relates to a visual hard sealing sampling valve which is characterized in that a conical sealing surface is arranged at one end, connected with a valve cavity, of a feeding port, a conical chamfer is arranged at the end of a valve element, and when an opening and closing mechanism drives a valve rod to move, the conical chamfer at the end of the valve element can be attached to the conical sealing surface, so that the valve element and the feeding port are in hard sealing fit; a transparent sample cup is arranged at the end opening of the sampling tube, and the cup opening of the transparent sample cup is detachably connected with the end opening of the sampling tube in a sealing manner. The sampling valve has the advantages that the conical sealing face is arranged at the connecting position of the feeding port and the valve cavity, the conical chamfer is arranged on the end face of the valve element, when the valve rod drives the valve element to move, the conical chamfer on the valve element can be in hard sealing face fit with the conical sealing face in the feeding port, and the sealing performance of the sampling valve is guaranteed. And secondly, the detachable transparent sample cup is arranged at the pipe orifice of the sampling pipe, so that whether the material sample is qualified or not can be clearly observed by naked eyes, the sampling verification work is simplified, and the sampling benefit is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve device, more particularly to a visual hard sealing sampling valve, mainly applied to the valve field. BACKGROUND

[0002] The sampling valve is basically installed in a tank or a pipeline, and most of the existing sampling valves are soft sealing, which is prone to leakage at the sealing point due to material pressure and natural decay of the sealing element. Secondly, during the sampling process, the sampling personnel need to receive the discharged material at the discharge port of the sampling valve and then observe it with the naked eye, and the whole process is relatively complicated. SUMMARY

[0003] To solve the above technical problems, the utility model provides a visual hard sealing sampling valve, which can not only avoid the natural decay of the sealing element and ensure the sealing performance, but also can visually observe the sample in real time, cannot hold the sampling container, and the sampling process is more convenient and efficient.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of a visual hard sealing sampling valve, which comprises a valve body, a valve cover, a valve core, a valve rod and an opening and closing mechanism. A valve cavity is arranged in the valve body, and a feed inlet and a sampling pipe are connected to the valve cavity. One end of the valve rod is fixedly connected to the valve core in the valve cavity, and the other end of the valve rod penetrates through the valve body and the valve cover and is connected to the opening and closing mechanism. One end of the feed inlet connected to the valve cavity is provided with a conical sealing surface, and the end of the valve core is provided with a conical chamfer. When the opening and closing mechanism drives the valve rod to displace, the conical chamfer at the end of the valve core is in contact with the conical sealing surface, so that the valve core and the feed inlet form a hard sealing cooperation. A transparent sample cup is arranged at the port of the sampling pipe, and the cup opening of the transparent sample cup is detachably and sealingly connected to the port of the sampling pipe.

[0005] Preferably, a cleaning pipe is arranged on the side wall of the valve body, one end of the cleaning pipe is connected to the valve cavity, the other end of the cleaning pipe is connected to an external water pipe and can remotely control the on-off of the cleaning pipe.

[0006] Preferably, a bellows is arranged on the valve rod in the valve cavity, one end of the bellows is fixedly connected to the valve core, and the other end of the bellows is fixedly connected to a guide sleeve arranged on the valve body, so that the valve rod and the valve cavity are physically isolated.

[0007] Preferably, a connecting seat is arranged on the end of the valve rod connected to the valve core, the end of the valve rod is welded and fixed to the connecting seat, a connecting thread is arranged outside the connecting seat, one end of the bellows is welded and fixed to the connecting seat, so that the valve rod and the valve cavity are physically isolated. A counterbore is arranged at the center of the valve core, and a connecting thread is arranged on the side wall of the counterbore. The valve core is threadedly connected to the connecting seat, and a sealing ring is arranged between the contact end faces of the valve core and the connecting seat.

[0008] Preferably, the guide sleeve is installed between the valve stem and the valve cover and is provided with a sealing element at the joint of the valve body and the valve cover, one end of the guide sleeve is arranged in the valve cover and a limiting groove is arranged on the guide sleeve, the valve stem is arranged in the guide sleeve and a limiting block is arranged on the valve stem, the limiting block is arranged in the limiting groove and forms opening limiting and closing limiting with the limiting groove when the limiting block moves up and down along with the valve stem.

[0009] Preferably, a driving shaft sleeve is arranged at one end of the valve cover, two groups of bearings are arranged on the driving shaft sleeve and are sleeved outside the driving shaft sleeve, and the opening and closing mechanism is detachably fixedly connected with the driving shaft sleeve; a driving thread is arranged in the driving shaft sleeve, and a synchronous thread is arranged on the peripheral side wall of the end portion of the valve stem, when the opening and closing mechanism is driven to rotate in opposite directions by external force, the driving shaft sleeve can be synchronously rotated and drive the valve stem to spiral ascend or descend to drive the valve core to open or close the feed port.

[0010] Preferably, a dustproof cover is arranged at one end of the driving shaft sleeve, and the dustproof cover is detachably threadedly connected with the driving shaft sleeve.

[0011] The beneficial effects of the utility model are that the conical sealing surface is arranged at the joint of the feed port and the valve cavity, the conical chamfer is arranged at the end surface of the valve core, when the valve stem drives the valve core to displace, the conical chamfer on the valve core can form hard sealing surface fitting with the conical sealing surface in the feed port, and the sealing performance of the sampling valve is ensured. Secondly, the detachable transparent sample cup is arranged at the pipe opening of the sampling pipe, when sampling, the transparent sample cup does not need to be taken out, and whether the material sample is qualified can be clearly observed by naked eye observation, the sampling verification work is simplified, and the sampling benefit is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a three-dimensional structure diagram of the visual hard sealing sampling valve of the utility model embodiment

[0013] Fig. 2 It is a sectional structure diagram of the visual hard sealing sampling valve of the utility model embodiment DETAILED DESCRIPTION

[0014] The following will be combined with the drawings Figs. 1-2 The embodiment of the utility model is further described:

[0015] The utility model discloses a visual hard sealing sampling valve, including valve body 1, valve cover 2, valve core 3, valve stem 4 and open and close mechanism 5, be equipped with valve cavity 11 in valve body 1 to and with valve cavity 11 intercommunication feed inlet 12 and sampling pipe 13 respectively, and one end of valve stem 4 is placed in valve cavity 11 and is connected with valve core 3 fixed, the other end passes through valve body 1 and valve cover 2 and is connected with open and close mechanism 5, the one end of feed inlet 12 is connected with valve cavity 11 and is equipped with conical sealing surface 14, and the end of valve core 3 is equipped with conical chamfer 15, when open and close mechanism 5 drive valve stem 4 displacement, can make the conical chamfer 15 of valve core 3 end and conical sealing surface 14 of the close fit make valve core 3 and feed inlet 12 form hard sealing cooperation, be equipped with transparent sample cup 6 at the port of sampling pipe 13, and the cup mouth of this transparent sample cup 6 is detachably sealed with the port of sampling pipe 13, connect.Through the conical sealing surface 14 of setting in the junction of feed inlet 12 and valve cavity 11, the conical chamfer 15 of setting in the end surface of valve core 3, when valve stem 4 drive valve core 3 displacement, the conical chamfer 15 on valve core 3 can form the face close fit of hard sealing with the conical sealing surface 14 in feed inlet 12, guarantee the sealing performance of sampling valve.Second, through the detachable transparent sample cup 6 of setting in the pipe orifice of sampling pipe 13, when sampling, can not need to take out transparent sample cup 6, can clearly see whether the material sample is qualified using the naked eye observation, simplify sampling verification work, improve sampling benefit.Of course, if the sample cannot be observed by the naked eye, the detachable transparent sample cup 6 can also prevent the sampling pipe 13 from being ejected out of the valve body 1 due to excessive pressure during sampling, improving the safety of sampling, especially for sampling of toxic and harmful materials.

[0016] In actual production, when the valve body 1 is fixed with the tank body or the pipeline, the valve seat flange 10 is used as a transition piece for fixing, the valve seat flange 10 is first welded and fixed with the bottom or side of the tank body or the side wall of the pipeline, and then the one end of the valve body 1 is welded and fixed with the valve seat flange 10, so that the tank body or the pipeline is prevented from being damaged when the valve is replaced.

[0017] In order to facilitate continuous operation and reduce the operation cost of the system, the cleaning pipe 16 is arranged on the side wall of the valve body 1, one end of the cleaning pipe 16 is communicated with the valve cavity 11, the other end is connected with an external water pipe and can remotely control the opening and closing of the cleaning pipe 16. In actual assembly, a remote control device such as a solenoid valve is arranged between the external water pipe and the cleaning pipe 16, and the operator can realize online cleaning of the sampling valve through the remote management system in real time, so that the cleaning work of the sampling valve on site is avoided, the cleaning benefit is improved, and the overall operation cost of the system is reduced.

[0018] To improve the sealing performance at the connection points between the valve stem 4 and the valve body 1, and between the valve stem 4 and the valve core 3, a bellows 41 is fitted over the valve stem 4, which is located inside the valve cavity 11. One end of the bellows 41 is fixedly connected to the valve core 3, and the other end is fixed to the guide sleeve 42 installed on the valve body 1, thus physically isolating the valve stem 4 from the valve cavity 11. By installing the bellows 41 on the outer peripheral wall of the valve stem 4 inside the valve cavity 11, the bellows 41 can protect the valve stem 4, physically isolating the valve stem 4 from the material entering the valve cavity 11. This not only prevents the valve stem 4 from direct contact with the material, but also creates a physical seal through the welding at both ends of the bellows 41, effectively preventing leakage at the connection points between the valve stem 4 and the valve body 1, and between the valve stem 4 and the valve core 3.

[0019] To ensure the protection of the valve stem 4 by the bellows 41 and the physical isolation between the valve stem 4 and the material inside the valve cavity 11, a connecting seat 43 is sleeved on the end of the valve stem 4 that connects to the valve core 3. The end of the valve core 3 is welded and fixed to the connecting seat 43, and a connecting thread is provided on the outside of the connecting seat 43. The welding and fixing of one end of the bellows 41 to the connecting seat 43 forms a physical isolation between the valve stem 4 and the valve cavity 11. A countersunk hole is provided at the center of the valve core 3, and a connecting thread is provided on the side wall of the countersunk hole. The valve core 3 is threadedly connected to the connecting seat 43, and a sealing ring is provided between the contact end faces of the valve core 3 and the connecting seat 43. By fixing the connecting seat 43 to the outside of the valve stem 4 and then welding one end of the bellows 41 to the connecting seat 43, it is ensured that the bellows 41 is connected and fixed, and the welding point between the bellows 41 and the connecting seat 43 can also form a physical seal, preventing direct contact between the valve stem 4 and the material and forming a physical seal. To facilitate the installation and replacement of the valve core 3, a connecting thread is provided on the outside of the connecting seat 43, which allows for easier and faster assembly or replacement of the valve core 3. Sealing rings are provided at the joint between the connecting seat 43 and the valve core 3, and at the joint between the valve stem 4 and the connecting seat 43 and the valve core 3. These sealing rings effectively prevent leakage at the joints from contacting the valve stem 4, thus ensuring the hygiene and safety of the sampling valve.

[0020] In order to prevent the valve stem 4 from damaging the hard sealing surface of the valve core 3 and the feed port 12 due to excessive rising or falling, the guide sleeve 42 is installed between the valve stem 4 and the valve cover 2, and a sealing element is arranged at the connection between the valve body 1 and the valve cover 2. One end of the guide sleeve 42 is arranged in the valve cover 2, and a limiting groove 44 is arranged on the guide sleeve 42. The valve stem 4 is arranged in the guide sleeve 42, and a limiting block 45 is arranged on the valve stem 4. The limiting block 45 is arranged in the limiting groove 44, and the limiting block 45 forms opening limiting and closing limiting with the limiting groove 44 when the limiting block 45 moves up and down with the valve stem 4. By arranging the limiting groove 44 and the limiting block 45 on the guide sleeve 42, the limiting block 45 rises and falls synchronously with the valve stem 4 when the valve stem 4 rises and falls. During the rising and falling process, the limiting block 45 is limited by the limiting groove 44, and the valve stem 4 can only rise or fall along the axis of the guide sleeve 42, and cannot rotate, thereby avoiding damage to the corrugated pipe 41 due to rotation. In addition, the limiting block 45 can effectively prevent the valve stem 4 from rising or falling excessively, thereby avoiding excessive extrusion of the valve core 3, ensuring the safety of the sealing surface of the valve core 3 and the feed port 12, and prolonging the service life of the sampling valve.

[0021] In order to facilitate the opening and closing of the sampling valve, a drive shaft sleeve 7 is arranged at one end of the valve cover 2. Two sets of bearings 8 are arranged on the drive shaft sleeve 7 and are arranged outside the drive shaft sleeve 7. The opening and closing mechanism 5 is detachably connected with the drive shaft sleeve 7. A drive thread is arranged in the drive shaft sleeve 7, and a synchronous thread is arranged on the outer peripheral side wall of the end portion of the valve stem 4. When the opening and closing mechanism 5 is driven to rotate in opposite directions by an external force, the drive shaft sleeve 7 can be synchronously rotated and drive the valve stem 4 to rise or fall, thereby driving the valve core 3 to open or close the feed port 12. By arranging the drive shaft sleeve 7 and arranging the drive thread in the drive shaft sleeve 7, when one end of the valve stem 4 is arranged in the drive shaft sleeve 7, the synchronous thread on the outer peripheral side wall of the valve stem 4 will engage with the drive thread. When the opening and closing mechanism 5 drives the drive shaft sleeve 7 to rotate in opposite directions, the rotation of the opening and closing mechanism 5 is changed into axial movement of the threads rising and falling under the action of the drive thread and the synchronous thread, thereby separating or adhering the valve core 3 and the feed port 12, and realizing the opening and closing of the sampling valve. Since the bearings 8 are arranged outside the drive shaft sleeve 7 and inside and outside the valve cover 2, when the opening and closing mechanism 5 drives the drive shaft sleeve 7 to rotate, the operation torque of the opening and closing mechanism 5 can be effectively reduced, and the smoothness and sensitivity of the opening and closing of the sampling valve can be improved. In actual production process, the opening and closing mechanism 5 can be selected as a manual hand wheel or an automatic control mechanism, and the specific selection can be determined according to the user's demand, which is not limited in the embodiment.

[0022] In order to prevent dust and other impurities from entering the drive shaft sleeve 7 and affecting the helical lifting or lowering of the valve stem 4, a dust cover 9 is arranged at one end of the drive shaft sleeve 7, which is detachably screwed with the drive shaft sleeve 7. By arranging the dust cover 9, dust and other impurities can be effectively prevented from entering the drive shaft sleeve 7, and the helical lifting and lowering of the valve stem 4 during the forward and reverse rotation of the drive shaft sleeve 7 is avoided, thereby improving the sensitivity and smoothness of the opening and closing of the sampling valve.

[0023] The above embodiments should not be regarded as limiting the utility model, but any improvement based on the spirit of the utility model should be within the protection scope of the utility model.

Claims

1. A visual hard-seal sampling valve, comprising a valve body, a valve cover, a valve core, a valve stem, and an opening and closing mechanism, wherein a valve cavity is provided within the valve body, and an inlet and a sampling tube respectively connected to the valve cavity; one end of the valve stem is placed inside the valve cavity and fixedly connected to the valve core, and the other end passes through the valve body and the valve cover and is connected to the opening and closing mechanism; characterized in that... The end of the feed inlet connected to the valve cavity is provided with a conical sealing surface, and the end of the valve core is provided with a conical chamfer. When the valve stem is driven to move by the opening and closing mechanism, the conical chamfer at the end of the valve core can fit with the conical sealing surface to form a hard seal between the valve core and the feed inlet. A transparent sample cup is provided at the port of the sampling tube, and the mouth of the transparent sample cup is detachably sealed to the port of the sampling tube.

2. The visual hard-seal sampling valve according to claim 1, characterized in that... A cleaning pipe is provided on the side wall of the valve body. One end of the cleaning pipe is connected to the valve cavity, and the other end is connected to an external water pipe. The opening and closing of the cleaning pipe can be remotely controlled.

3. The visual hard-seal sampling valve according to claim 1, characterized in that... The valve stem, located inside the valve cavity, is fitted with a bellows. One end of the bellows is fixedly connected to the valve core, and the other end is fixedly connected to the guide sleeve installed on the valve body, thus physically isolating the valve stem from the valve cavity.

4. The visual hard-seal sampling valve according to claim 3, characterized in that... A connecting seat is provided at the end where the valve stem connects to the valve core. The end of the valve core is welded and fixed to the connecting seat, and a connecting thread is provided on the outside of the connecting seat. One end of the bellows is welded and fixed to the connecting seat, so that the valve stem and the valve cavity are physically isolated. A countersunk hole is provided at the center of the valve core, and a connecting thread is provided on the side wall of the countersunk hole. The valve core and the connecting seat are threadedly connected, and a sealing ring is provided between the contact end faces of the valve core and the connecting seat.

5. The visual hard-seal sampling valve according to claim 3, characterized in that... The guide sleeve is installed between the valve stem and the valve cover, and a sealing element is provided at the connection between the valve body and the valve cover. One end of the guide sleeve is placed inside the valve cover and a limiting groove is provided on the guide sleeve. The valve stem is placed inside the guide sleeve and a limiting block is provided on the valve stem. The limiting block is placed in the limiting groove and forms an opening limit and a closing limit with the limiting groove when the limiting block moves up and down with the valve stem.

6. The visual hard-seal sampling valve according to claim 1, characterized in that... A drive bushing is provided at one end of the valve cover. Two sets of bearings are provided on the drive bushing and are fitted outside the drive bushing. The opening and closing mechanism is detachably fixedly connected to the drive bushing. A drive thread is provided inside the drive bushing, and a synchronous thread is provided on the outer peripheral side wall of the valve stem end. When the opening and closing mechanism is driven to rotate in both directions by external force, the drive bushing can rotate synchronously and drive the valve stem to rise or fall, thereby driving the valve core to open or close the feed port.

7. The visual hard-seal sampling valve according to claim 6, characterized in that... A dust cover is provided at one end of the drive shaft sleeve, and the dust cover is detachably threaded to the drive shaft sleeve.

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