Pilot-operated bypass leakage-free self-control return valve

Abstract

The utility model belongs to the technical field of self-control return valves, and particularly relates to a pilot-operated bypass leakage-free self-control return valve which comprises a valve body, a liquid inlet pipe is arranged at the top end of the valve body, a vertical block is connected to the surface of the outer side of the top end of the liquid inlet pipe, and a butt joint pipe is connected to the surface of the top of the vertical block. The vertical block, the flow guide block, the filtering box, the filtering net basket, the sealing ring and the bolt are matched with one another, a filtering mechanism can be arranged at one end of the liquid inlet pipe of the valve body, circulating liquid can be filtered through the filtering net basket in the vertical block, and therefore granular impurities attached to the circulating liquid are removed, the impurities are prevented from entering the valve body, and the service life of the valve body is prolonged. And secondly, an information mechanism is arranged, a replaceable information plate is arranged on a vertical block, after an operator maintains the filter screen basket, the operator can be reminded to maintain the filter screen basket on a designated date by placing the information plate written with the next maintenance time, and the use effect of the filter screen basket is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of automatic control reflux valves, and particularly relates to a pilot bypass leak-free automatic control reflux valve. Background Technique

[0002] An automatic control reflux valve is an important valve device, mainly used to prevent the reverse flow of liquid or gas in a pipeline system and ensure the normal operation of the pipeline system.

[0003] For example, a pilot bypass leak-free automatic control reflux valve with the publication number "CN210510387U" relates to the technical field of protection valves; it includes a valve body, a valve cover, a check valve, a guide rod bushing, a main path spring, a valve seat, a valve stem, a guide sleeve, a guide valve body, a pilot valve, and a pilot valve spring; the valve cover is coaxially and fixedly installed on the top opening of the valve body; the valve seat is fixedly installed at the axial position of the valve body; an opening is provided on the side wall of the valve seat; the valve stem is arranged at the axis of the valve seat; the guide valve body is sleeved on the outer wall of the top of the valve stem; the check valve is sleeved on the top of the guide valve body; the guide sleeve is sleeved on the outer wall at the connection of the valve stem and the guide valve body; the pilot valve is fixedly installed on the lower surface of the top of the guide valve body; the top of the pilot valve spring contacts the pilot valve; the bottom of the pilot valve spring contacts the valve stem; the guide rod bushing is sleeved on the outer wall of the top of the check valve; the main path spring is arranged between the guide rod bushing and the check valve; the utility model integrates functions such as flow-through, guiding, sealing, and regulating, and solves the problem of valve vibration caused by excessive bypass pressure difference.

[0004] The inventor believes that when the above-mentioned pilot bypass leak-free automatic control reflux valve is in use, since there is no filtering mechanism at one end of the liquid inlet of the automatic control reflux valve, when there are particulate impurities in the liquid flowing through the automatic control reflux valve, the impurities will directly enter the valve body, and these impurities may cause problems such as blocking the valve and scratching the sealing surface, thus affecting the normal use of the automatic control reflux valve.

[0005] Therefore, the utility model provides a pilot bypass leak-free automatic control reflux valve to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a pilot bypass leak-free automatic control reflux valve, aiming to solve the problem that in the prior art, there is no filtering mechanism at one end of the liquid inlet of the pilot bypass leak-free automatic control reflux valve, and when there are impurities in the flowing liquid, the impurities will directly enter the valve body, thus affecting the normal use of the automatic control reflux valve.

[0007] To achieve the above object, the present utility model provides the following technical solution: A pilot bypass leak-free automatic reflux valve, including a valve body, a liquid inlet pipe is provided at the top of the valve body, a vertical block is connected to the outer surface of the top of the liquid inlet pipe, a docking pipe is connected to the top surface of the vertical block, and a diversion block is connected to the inner bottom end of the vertical block. A placement groove is formed on one side surface of the vertical block, a filter box is connected to the inner surface of the placement groove, a filter basket is connected to the inner surface of the top end of the filter box, and a sealing ring is connected to the outer surface of one end of the filter box. One end of the sealing ring extends into a clamping groove formed inside the vertical block. A bolt penetrates through one side surface of the filter box, and one end of the bolt extends into a fixing hole formed inside one side of the vertical block. An information mechanism is also provided on one side surface of the vertical block.

[0008] To remind the operator of the time for the next maintenance of the filter basket, as an optimization of the pilot bypass leak-free automatic reflux valve of the present utility model, the information mechanism includes: a convex block, a sliding groove, an information board, a notch, a push plate and a screw. A convex block is connected to one side surface of the vertical block, a sliding groove is formed on the top surface of the convex block, an information board is connected to the inner surface of the sliding groove, a notch is formed on the inner bottom surface of the sliding groove, a push plate is connected to the inner surface of the notch, a screw is connected to the bottom surface of the push plate, and the other end of the screw penetrates through the bottom surface of the convex block.

[0009] To enable the liquid to flow into the valve body through the vertical block, as an optimization of the pilot bypass leak-free automatic reflux valve of the present utility model, the liquid inlet pipe and the docking pipe are connected to the internal space of the vertical block.

[0010] To achieve the placement of the filter box and improve the sealing between the filter box and the vertical block, as an optimization of the pilot bypass leak-free automatic reflux valve of the present utility model, the filter box is slidably connected to the vertical block through the placement groove, and the sealing ring is snap-fitted to the vertical block through the clamping groove.

[0011] To fix the position of the filter box, as an optimization of the pilot bypass leak-free automatic reflux valve of the present utility model, the bolt is threadedly connected to the fixing hole through the filter box.

[0012] To move the information board and change the position of the screw, as an optimization of the pilot bypass leak-free automatic reflux valve of the present utility model, the information board is slidably connected to the convex block through the sliding groove, and the screw is threadedly connected to the convex block.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] Through the mutual cooperation among the upright block, the diversion block, the filter box, the filter basket, the sealing ring and the bolt, a filtering mechanism can be arranged at one end of the liquid inlet pipe of the valve body, so that the flowing liquid will first pass through the filter basket inside the upright block for filtering, thereby removing the particulate impurities attached to the flowing liquid, avoiding the impurities from entering the valve body, and ensuring the stability of the valve body during operation.

[0015] Through the provided information mechanism, a replaceable information board is arranged on the upright block, so that after the operator maintains the filter basket, the operator can place an information board with the next maintenance time written on it to remind the operator to maintain the filter basket on the specified date, ensuring the use effect of the filter basket. Brief Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 is a partial exploded structural schematic diagram of the upright block of the present invention;

[0019] Figure 3 is a partial sectional structural schematic diagram of the upright block of the present invention;

[0020] Figure 4 is a partial sectional exploded structural schematic diagram of the convex block of the present invention.

[0021] In the figure: 1, valve body; 2, liquid inlet pipe; 3, upright block; 4, docking pipe; 5, diversion block; 6, placement groove; 7, filter box; 8, filter basket; 9, sealing ring; 10, clamping groove; 11, bolt; 12, fixing hole; 13, convex block; 14, sliding groove; 15, information board; 16, notch; 17, push plate; 18, screw rod. Detailed Description of the Invention

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1-4, the present utility model provides the following technical solutions: A pilot bypass leak-free automatic reflux valve, including a valve body 1, a liquid inlet pipe 2 is provided at the top of the valve body 1, a vertical block 3 is connected to the outer surface of the top of the liquid inlet pipe 2, a docking pipe 4 is connected to the top surface of the vertical block 3, and a diversion block 5 is connected to the inner bottom end of the vertical block 3. A placement groove 6 is provided on one side surface of the vertical block 3, a filter box 7 is connected to the inner surface of the placement groove 6, a filter basket 8 is connected to the inner surface of the top end of the filter box 7, and a sealing ring 9 is connected to the outer surface of one end of the filter box 7. One end of the sealing ring 9 extends into a clamping groove 10 opened in the interior of the vertical block 3. A bolt 11 is connected through one side surface of the filter box 7, and one end of the bolt 11 extends into a fixing hole 12 opened in the interior of one side of the vertical block 3. An information mechanism is also provided on one side surface of the vertical block 3.

[0024] Preferably: The information mechanism includes: a convex block 13, a sliding groove 14, an information board 15, a notch 16, a push plate 17, and a screw 18. A convex block 13 is connected to one side surface of the vertical block 3, a sliding groove 14 is opened on the top surface of the convex block 13, an information board 15 is connected to the inner surface of the sliding groove 14, a notch 16 is opened on the inner bottom surface of the sliding groove 14, a push plate 17 is connected to the inner surface of the notch 16, and a screw 18 is connected to the bottom surface of the push plate 17. The other end of the screw 18 penetrates through the bottom surface of the convex block 13.

[0025] During specific use, the material of the convex block 13 is transparent plastic. After the maintenance of the filter basket 8 is completed, the information board 15 with the next maintenance time written on it is slid and placed into the sliding groove 14 on the convex block 13. In this way, the operator can observe the information on the information board 15 through the convex block 13. By turning the screw 18, the position of the screw 18 on the convex block 13 can be changed, so that the screw 18 drives the push plate 17 to slide out of the notch 16, enabling the push plate 17 to push the information board 15 to slide in the sliding groove 14, causing one end of the information board 15 to move out of the convex block 13, allowing the operator to pull out the information board 15 from the sliding groove 14 through the protruding end of the information board 15, enabling the operator to replace the information board 15.

[0026] Preferably: The liquid inlet pipe 2 and the docking pipe 4 are connected to the internal space of the vertical block 3.

[0027] During specific use, the liquid in the docking pipe 4 can flow into the vertical block 3, and after being filtered by the filter basket 8 inside the vertical block 3, it can then flow into the valve body 1 through the liquid inlet pipe 2.

[0028] Preferably: The filter box 7 is slidably connected to the vertical block 3 through the placement groove 6, and the sealing ring 9 is snap-fitted to the vertical block 3 through the clamping groove 10.

[0029] During specific use, the filter box 7 can slide in the placement groove 6, enabling the filter box 7 to be pulled on the vertical block 3. When the filter box 7 is completely placed in the placement groove 6, the sealing ring 9 on the filter box 7 will be driven to the position of the clamping groove 10, allowing the sealing ring 9 to be elastically clamped in the clamping groove 10, thereby increasing the sealing between the filter box 7 and the vertical block 3. The sealing ring 9 is made of rubber material.

[0030] Preferably: The bolt 11 forms a threaded connection through the filter box 7 and the fixing hole 12.

[0031] During specific use, the bolt 11 is screwed into the fixing hole 12 through the filter box 7, and the position of the filter box 7 can be fixed in the placement groove 6.

[0032] Preferably: The information board 15 forms a sliding connection with the convex block 13 through the sliding groove 14, and the screw rod 18 forms a threaded connection with the convex block 13.

[0033] During specific use, the information board 15 can be slid into the sliding groove 14, and by turning the screw rod 18, the position of the screw rod 18 on the convex block 13 can be changed.

[0034] Working principle: When using this pilot bypass non-leakage self-controlled reflux valve, the filter box 7 with the filter mesh basket 8 is slid into the placement groove 6 on the vertical block 3. At this time, the filter box 7 will drive the sealing ring 9 connected to the outer surface of one end to move to the position of the clamping groove 10. At this time, the sealing ring 9 will be elastically clamped in the clamping groove 10, thereby increasing the sealing between the filter box 7 and the vertical block 3. Then, the bolt 11 is screwed into the fixing hole 12 through the filter box 7, and the position of the filter box 7 can be fixed in the placement groove 6. At this time, by connecting the docking pipe 4 to the designated pipeline, when the liquid in the pipeline flows to the docking pipe 4, it will slide into the vertical block 3. In this way, the filter mesh basket 8 will filter the sliding liquid, so that the particulate impurities carried in the liquid are filtered out, and the filtered liquid will then flow into the liquid inlet pipe 2 through the guide block 5, and then enter the valve body 1 of the pilot bypass non-leakage self-controlled reflux valve. In this way, impurities can be prevented from entering the valve body 1, ensuring the stability of the valve body 1 during operation. The filter mesh basket 8 needs to be maintained regularly. By turning the bolt 11, one end of the bolt 11 is separated from the fixing hole 12, and the filter box 7 can be pulled out of the placement groove 6, allowing the operator to maintain the filter mesh basket 8 inside the filter box 7 to ensure the fluidity of the filter mesh basket 8. Secondly, when the maintenance of the filter mesh basket 8 is completed, the information board 15 with the next maintenance time written on it is slid into the sliding groove 14 on the convex block 13. In this way, the operator can observe the information on the information board 15 through the convex block 13, thereby reminding the operator of the next maintenance time of the filter mesh basket 8.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pilot-operated bypass non-leakage self-controlled reflux valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a liquid inlet pipe (2) at the top end thereof, the outer surface of the top end of the liquid inlet pipe (2) is connected to a stand (3), the top surface of the stand (3) is connected to a butt pipe (4), and the inner bottom end of the stand (3) is connected to a guide block (5), a placement groove (6) is provided on one side surface of the stand (3), a filter box (7) is connected to the inner surface of the placement groove (6), a filter net basket (8) is connected to the inner surface of the top end of the filter box (7), and a sealing ring (9) is connected to the outer surface at one end of the filter box (7), one end of the sealing ring (9) extends into a slot (10) provided inside the stand (3), a bolt (11) is passed through and connected to one side surface of the filter box (7), one end of the bolt (11) extends into a fixing hole (12) provided inside one side of the stand (3), and an information mechanism is also provided on one side surface of the stand (3).

2. A pilot-operated bypass non-leakage automatic reflux valve according to claim 1, characterized in that: The information mechanism comprises: a protrusion (13), a sliding groove (14), an information plate (15), a notch (16), a push plate (17) and a screw (18); a surface of one side of the vertical block (3) is connected to the protrusion (13); a sliding groove (14) is provided on the top surface of the protrusion (13); an inner surface of the sliding groove (14) is connected to the information plate (15); a notch (16) is provided on the inner bottom surface of the sliding groove (14); a push plate (17) is connected to the inner surface of the notch (16); a screw (18) is connected to the bottom surface of the push plate (17); the other end of the screw (18) passes through the bottom surface of the protrusion (13).

3. A pilot-operated bypass non-leakage automatic reflux valve according to claim 1, characterized in that: The liquid inlet pipe (2) and the butt joint pipe (4) are connected to the internal space of the vertical block (3).

4. A pilot-operated bypass non-leakage automatic reflux valve according to claim 1, characterized in that: The filter box (7) is slidably connected to the upright block (3) via the placement groove (6), and the sealing ring (9) is engaged with the upright block (3) via the engagement groove (10).

5. A pilot-operated bypass non-leakage automatic reflux valve according to claim 1, characterized in that: The bolt (11) penetrates the filter box (7) and forms a threaded connection with the fixing hole (12).

6. A pilot-operated bypass non-leakage automatic reflux valve according to claim 2, characterized in that: The information plate (15) is slidably connected to the protrusion (13) via the sliding groove (14), and the screw rod (18) is threadedly connected to the protrusion (13).

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