Self-drainage type check valve for ore pulp conveying

Abstract

The utility model discloses a self-drainage check valve for ore pulp delivery, which comprises a valve body, a valve rod, a main valve plate and an auxiliary valve plate, a valve cavity is arranged in the middle of the valve body, the valve cavity is communicated with a first flow channel at the lower part, a second flow channel at the left side and a third flow channel at the right side, one end of the valve rod vertically penetrates through the valve body, extends into the valve cavity and is connected with the main valve plate, and the other end of the valve rod is connected with the auxiliary valve plate. The auxiliary valve plate is connected with the valve rod through a support, the auxiliary valve plate is perpendicular to the main valve plate, the main valve plate is used for sealing the first flow channel, the auxiliary valve plate is used for sealing the third flow channel, and the first flow channel and the third flow channel are opened or closed asynchronously. The valve rod drives the main valve plate and the auxiliary valve plate to move at the same time so as to switch opening and closing between the two channels, opening and closing of the valve are set through the dead weight of the main valve plate, manual opening and closing are not needed, electromagnetic control is not needed, the purpose of automatically discharging backflow ore pulp can be achieved only by controlling an ore pulp conveying pump switch, additional control operation on the valve is not needed, and the cost is reduced. Time and labor are saved, and cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of ore slurry valves, and in particular relates to a self-draining check valve used for ore slurry transportation. Background Art

[0002] During the ore dressing slurry transportation process, when the delivery pump stops, the slurry in the pipeline will usually flow back into the pump body. In order to prevent the pump from being buried or damaging the seal, a check valve is usually installed at the outlet end of the pump. After the pump stops, the slurry cannot flow back into the pump body. Then a manual valve is used to remove the residual slurry in the pipeline to avoid clogging the pipeline. However, this operation is cumbersome, time-consuming and labor-intensive. Another method is to achieve three-way control through a solenoid valve, but the solenoid valve needs to be controlled separately, which increases the control nodes, which is not conducive to the popularization and application of intelligent control systems under the goal of high-quality development, and the cost of the solenoid valve is also high.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a self-draining check valve for slurry transportation. To solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0005] A self-draining check valve for slurry transportation comprises a valve body, a valve stem, a main valve plate and an auxiliary valve plate. The middle portion of the valve body is a valve cavity, which is connected to a first flow channel at the bottom, a second flow channel on the left and a third flow channel on the right. One end of the valve stem vertically passes through the valve body and extends into the valve cavity and is connected to the main valve plate, and the other end is connected to a tightening nut. The auxiliary valve plate is connected to the valve stem through a bracket, and the auxiliary valve plate and the main valve plate are perpendicular to each other. The main valve plate is used to close the first flow channel, and the auxiliary valve plate is used to close the third flow channel, and the first flow channel and the third flow channel are not opened or closed at the same time.

[0006] Furthermore, it also includes a tensioning spring, which is sleeved on the valve stem between the adjusting nut and the valve body.

[0007] Furthermore, it also includes a magnet S pole and a magnet N pole, wherein the magnet S pole is arranged on the valve body, and the magnet N pole is arranged on the main valve plate, and the sum of the magnetic force of the two and the elastic force of the tension spring is slightly smaller than the gravity of the main valve plate.

[0008] Furthermore, the valve body is provided with a slideway for guiding the movement of the auxiliary valve plate.

[0009] Furthermore, it also includes a wear-resistant protective sleeve, which is sleeved on the outer wall of the valve stem located in the valve cavity.

[0010] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art.

[0011] The utility model discloses driving the main valve plate and the auxiliary valve plate to move at the same time through the valve stem to switch the opening and closing between the two channels, and setting the opening and closing of the valve by utilizing the dead weight of the main valve plate, without manual opening and closing and electromagnetic control, and the purpose of automatically discharging the reflux slurry can be achieved by only controlling the switch of the slurry delivery pump, without additional control operation of the valve, thus saving time and effort and having low cost.

[0012] The utility model has an ingenious structural design and does not require single valve single control like the traditional solenoid valve, which can reduce the control nodes and is conducive to the popularization of the utility model in the automatic mineral processing system.

[0013] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are part of this application and are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation on the utility model. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0015] Figure 1 This is a schematic diagram of the main valve plate of the utility model in an open state;

[0016] Figure 2 It is a schematic diagram of the main valve plate of the utility model in the closed state.

[0017] In the figure:

[0018] 1-valve body; 101-slideway; 11-first flow channel; 12-second flow channel; 13-third flow channel;

[0019] 2-valve stem; 3-main valve plate; 4-auxiliary valve plate; 5-tensioning spring; 6-adjusting nut; 7-wear-resistant protective cover; 8-magnet S pole; 9-magnet N pole.

[0020] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Embodiment 1

[0025] like Figure 1-2 As shown, a self-draining check valve for slurry transportation described in this embodiment includes a valve body 1, a valve stem 2, a main valve plate 3, an auxiliary valve plate 4, a tension spring 5, a tightening nut 6, a magnet S pole 8, a magnet N pole 9, and a wear-resistant protective sleeve 7. The middle part of the valve body 1 is a valve cavity, which is connected to the first flow channel 11 at the bottom, the second flow channel 12 on the left, and the third flow channel 13 on the right. Combined with the accompanying drawings, the three flow channels are respectively located at the bottom, left, and right, that is, a three-way valve structure.

[0026] One end of the valve stem 2 vertically passes through the valve body 1 and extends into the valve cavity and is connected to the main valve plate 3, and the other end is connected to the tightening nut 6. The main valve plate 3 here is used to close the first flow channel 11; the auxiliary valve plate 4 is connected to the valve stem 2 through a bracket, and the auxiliary valve plate 4 and the main valve plate 3 are perpendicular to each other. The auxiliary valve plate 4 is used to close the third flow channel 13, and the first flow channel 11 and the third flow channel 13 are not opened or closed at the same time, that is, when the first flow channel 11 is opened, the third flow channel 13 is closed, and vice versa.

[0027] The tension spring 5 is sleeved on the valve stem 2 between the adjusting nut 6 and the valve body 1. The tension spring 5 is in a compressed state. The spring will apply elastic force to the adjusting nut 6 so that the adjusting nut 6 moves up with the valve stem 2. The S pole of the magnet 8 is set on the valve body 1, which can be annular, sleeved around the valve stem 2 and connected to the valve body 1. The N pole of the magnet 9 is set on the main valve plate 3. Due to the attraction between the two poles, an upward magnetic attraction force can be applied to the valve plate. The sum of the magnetic force and the elastic force of the tension spring 5 here is slightly smaller than the gravity of the main valve plate 3, that is, the self-weight of the main valve plate 3 can overcome the elastic force and magnetic force and fall down to close the first flow channel 11.

[0028] When the valve is working, two states can be achieved:

[0029] In the first state, the slurry enters the valve cavity from the first flow channel 11 and hits the main valve plate 3. The slurry hitting the top will exert an upward force on the main valve plate 3. With the upward force exerted by the elastic force and the magnetic force, the main valve plate 3 will move upward, so that the valve stem 2 moves upward with the auxiliary valve plate 4 to close the third flow channel 13. At this time, the first flow channel 11 is opened and the third flow channel 13 is closed, and the slurry will flow out from the second flow channel 12. This is the slurry conveying process when the main valve plate 3 is open.

[0030] In the second state, the slurry stops entering the first flow channel 11. Due to the self-weight of the main valve plate 3, the elastic force and magnetic force cannot overcome its gravity. The main valve plate 3 will fall and close the first flow channel 11, so that the valve stem 2 moves down with the auxiliary valve plate 4 to open the third flow channel 13. At this time, the first flow channel 11 is closed and the third flow channel 13 is opened, and the slurry reflux in the pipeline will enter the valve cavity from the second flow channel 12 and be discharged from the third flow channel 13. This is the discharge process of the reflux slurry when the main valve plate 3 is closed.

[0031] The opening / closing of the auxiliary valve plate 4 mainly depends on the position change of the main valve plate 3, and the up and down movement of the main valve plate 3 depends on the top force provided by the slurry in the first flow channel 11. Therefore, according to the actual slurry flow rate and flow requirements, the elastic force and magnetic force of the tightening spring are set to achieve the purpose of automatically discharging the reflux slurry.

[0032] The auxiliary valve plate 4 slides up and down to realize the opening / closing of the third flow channel 13. Preferably, the valve body 1 is provided with a slideway 101 for guiding the movement of the auxiliary valve plate 4, which is conducive to the movement and guidance of the auxiliary valve plate 4. In addition, when the reflux slurry is discharged, the slurry will cause certain wear or erosion to the valve stem 2. It is very necessary to add a protective structure. The wear-resistant protective sleeve 7 has this function. The wear-resistant protective sleeve 7 is set on the outer wall of the valve stem 2 located in the valve cavity. Of course, it can also be replaced by a coating protective layer, such as a ceramic layer, a wear-resistant layer, etc., as long as the wear-resistant protection function of the valve stem 2 is met.

[0033] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A self-draining check valve for slurry transportation. Features: The invention comprises a valve body (1), a valve stem (2), a main valve plate (3), and an auxiliary valve plate (4); the middle part of the valve body (1) is a valve cavity, which is connected to a first flow channel (11) at the bottom, a second flow channel (12) on the left, and a third flow channel (13) on the right; one end of the valve stem (2) vertically passes through the valve body (1) and extends into the valve cavity and is connected to the main valve plate (3); the other end is connected to a tightening nut (6); the auxiliary valve plate (4) is connected to the valve stem (2) via a bracket, and the auxiliary valve plate (4) and the main valve plate (3) are perpendicular to each other; the main valve plate (3) is used to close the first flow channel (11), and the auxiliary valve plate (4) is used to close the third flow channel (13); and the first flow channel (11) and the third flow channel (13) are not opened or closed at the same time.

2. A self-draining check valve for slurry transportation according to claim 1, Features: It also includes a tensioning spring (5) which is sleeved on the valve stem (2) between the adjusting nut (6) and the valve body (1).

3. A self-draining check valve for slurry transportation according to claim 2, Features: It also comprises a magnet S pole (8) and a magnet N pole (9), wherein the magnet S pole (8) is arranged on the valve body (1), and the magnet N pole (9) is arranged on the main valve plate (3), and the sum of the magnetic forces of the two and the elastic force of the tension spring (5) is less than the gravity of the main valve plate (3).

4. A self-draining check valve for slurry transportation according to claim 1, Features: The valve body (1) is provided with a slideway (101) for guiding the movement of the auxiliary valve plate (4).

5. A self-draining check valve for slurry transportation according to claim 1, Features: It also includes a wear-resistant protective sleeve (7), which is sleeved on the outer wall of the valve stem (2) located in the valve cavity.

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