Sliding shear cover plate valve and delivery pump adopting same

Abstract

The utility model discloses a sliding shear cover plate valve and a delivery pump adopting the same. The sliding shear cover plate valve comprises a fluid passing body (1); the cover plate (2) can move between an opening position and a closing position; at the closing position, the through-flow hole is closed by the cover plate (2); at the opening position, the cover plate (2) opens the through-flow hole; in the process that the through-flow hole is closed by the cover plate (2), the edge of the cover plate (2) and the hole opening edge of the through-flow hole of the through-flow body (1) shear materials which stop the through-flow hole from being closed, and therefore the fault that the through-flow hole cannot be closed due to blocking of a blocking object is avoided.

Description

Technical Field

[0001] The utility model relates to the field of delivery pumps, in particular to a sliding shear cover plate valve used for pumping impurity-containing paste mud and a delivery pump using the same. Background Art

[0002] In the cement mortar pipeline transportation project of construction engineering, the filling cement pipeline transportation project of mine backfill mining and the coal slime pipeline transportation project of coal slime power plant, since cement mortar, filling cement and coal slime often contain some impurities, such as stones, iron blocks, wood blocks, rope ends and other impurities, for ordinary gate valve type concrete delivery pumps, cone seal lifting valve delivery pumps and one-way valve delivery pumps, these impurities are very easy to get stuck in the seal of the reversing valve, resulting in the valve not closing tightly, and a gap is generated in the seal. The high-pressure slurry will flow through the gap of the reversing valve at a high speed, causing serious erosion and damage to the valve, and causing pumping pressure loss.

[0003] On the other hand, diaphragm pumps are commonly used for pumping aluminum tailings. The reversing valve of the diaphragm pump is a one-way valve structure. However, since aluminum tailings are very easy to form plaques on the one-way valve, the one-way valve will also be eroded and abraded due to poor closure due to the obstruction of the plaques, which will affect its service life and cause pumping pressure loss, which will lead to drastic changes in the pumping flow rate, affecting the safe operation of the entire tailings conveying system. In addition, the price of wearing parts such as diaphragms is relatively high, and the investment and operation and maintenance costs are high, which brings a heavy economic burden to enterprises.

[0004] For S-tube valve delivery pumps, although these impurities can be cut off to achieve reliable switching of the reversing valve, the S-tube valve pump has an insurmountable problem of material backflow. The backflow of materials not only causes pulsation shock of pumping pressure, but also greatly reduces the delivery efficiency. Moreover, the longer the delivery distance, the more serious the backflow, which also leads to its short delivery distance and cannot meet the needs of high-efficiency and long-distance pipeline delivery projects. Utility Model Content

[0005] The utility model aims to provide a sliding shear cover plate valve to overcome or at least alleviate the problem of impurities blocking the valve and realize reliable switching of the valve.

[0006] To achieve the above object, the utility model provides a sliding shear cover valve, the sliding shear cover valve comprising:

[0007] A flow body, one end of which is provided with a first matching surface, a flow hole is provided in the flow body, and the flow hole penetrates the flow body and the first matching surface;

[0008] A cover plate, one end of which is provided with a second mating surface, the second mating surface is adapted to be fitted with the first mating surface of the fluid-passing body, and the cover plate can move between an open position and a closed position relative to the fluid-passing body; in the closed position, the cover plate is aligned with the flow hole, covers and closes the flow hole, and cuts off the flow passage of the valve; in the open position, the cover plate leaves the closed position and opens the flow hole;

[0009] A driving device, the driving device is connected to the cover plate and is used to drive the cover plate to move between the open position and the closed position;

[0010] In which, during the process of the cover plate closing the flow hole for the fluid, the cover plate and the fluid slide relatively, and the edge of the cover plate and the edge of the opening of the flow hole for the fluid can shear the material that blocks its closure, thereby avoiding the failure of closing due to the obstruction of the obstacle; when the cover plate is in the closed position, the opening of the closed flow hole for the fluid that contacts the cover plate is all located within the second matching surface of the cover plate, and the pressure of the material directly presses the cover plate against the fluid, so that the first matching surface of the fluid and the second matching surface of the cover plate fit tightly, and the greater the pressure of the material, the tighter the two fitting surfaces fit, and the tighter the seal.

[0011] Preferably, the sliding shear cover plate valve further comprises a dragging body, and the driving device is connected to and drives the cover plate via the dragging body.

[0012] Preferably, the sliding shear cover valve also includes an elastomer, which applies an elastic force to the cover plate toward the fluid flow, so that the second mating surface remains in contact with the first mating surface, and compensates for the wear of the first mating surface of the fluid flow and the second mating surface of the cover plate, so that even after wear, the first mating surface of the fluid flow and the second mating surface of the cover plate can still fit closely together, thereby ensuring the reliability of the fit seal.

[0013] Under the action of the elastic force of the elastomer, the wear of the cover plate and / or the flow fluid can be compensated. Therefore, when the cover plate and / or the flow fluid are worn, the elastomer can still press the cover plate and the flow fluid together tightly, thereby meeting the sealing requirements for closing the flow hole.

[0014] Preferably, the dragging body is provided with a mounting hole, and the mounting hole is a through hole. The cover plate is located at one end of the mounting hole of the dragging body and is connected to the dragging body. The elastic body is located in the mounting hole of the dragging body and is in contact with the dragging body and the cover plate at the same time. The mounting hole of the dragging body is used to connect the elastic body and the cover plate on the one hand, and can make the pressure of the material act on the cover plate through the mounting hole on the other hand, and push the cover plate toward the flow-through body. The greater the material pressure, the greater the sealing pressure between the cover plate and the flow-through body, and the better the sealing performance. Preferably, the flow-through body has two flow holes, and the cover plate can slide relative to the flow-through body, so as to alternately open or close the two flow holes to realize the switching of the material flow channel. The open position and closed position of the cover plate relative to one flow hole of the flow-through body are the closed position and open position relative to the other flow hole. Two flow holes, for example, have the following advantages: since the cover plate can move between the two through holes, the two flow holes can be alternately opened and closed, and the two flow holes will not be closed at the same time. When used as a discharge valve, the reliability is higher.

[0015] The utility model also provides a delivery pump, which comprises a feed valve and / or a discharge valve, wherein the feed valve and / or the discharge valve is the sliding shear cover valve as described above.

[0016] Preferably, the delivery pump comprises a feed valve and a discharge valve, wherein the feed valve and the discharge valve are the sliding shear cover valves as described above.

[0017] The pumping cylinder is connected to the feed valve, which is in turn connected to the discharge valve. The cavity between the feed valve, the discharge valve and the pumping cylinder is a valve chamber. The cover plate on the feed valve is located on one side inside the valve chamber, and the cover plate on the discharge valve is located on one side outside the valve chamber.

[0018] Preferably, the feed valve includes a first feed valve and a second feed valve, wherein the first feed valve and the second feed valve are both sliding shear cover valves as described above, the pumping cylinder includes a first pumping cylinder and a second pumping cylinder, the pumping hydraulic cylinder includes a first pumping hydraulic cylinder and a second pumping hydraulic cylinder, the first pumping hydraulic cylinder is connected to the first pumping cylinder, the first pumping cylinder is connected to the first feed valve, the first feed valve is further connected to the discharge valve, the second pumping hydraulic cylinder is connected to the second pumping cylinder, the second pumping cylinder is connected to the second feed valve, the second feed valve is further connected to the discharge valve, and the flow passage of the discharge valve has two flow holes.

[0019] Preferably, the delivery pump further includes a pumping hydraulic pump, a connecting chamber hydraulic pump, a connecting chamber hydraulic valve group, a first pumping hydraulic valve group, a second pumping hydraulic valve group, a first feed hydraulic valve group, a second feed hydraulic valve group and a discharge hydraulic valve group, the first feed valve further includes a first feed valve driving cylinder, which is used to drive and control the opening and closing of the first feed valve, the second feed valve further includes a second feed valve driving cylinder, which is used to drive and control the opening and closing of the second feed valve, the discharge valve further includes a discharge valve driving cylinder, which is used to drive and control the cross-flow of the two through-flow holes of the discharge valve. The first pumping hydraulic cylinder and the second pumping hydraulic cylinder are connected in parallel, and the connecting chamber is connected to the connecting chamber hydraulic valve group through an oil circuit, and the connecting chamber hydraulic valve group is connected to the return oil pipeline and the connecting chamber hydraulic pump through an oil circuit; the connecting chamber hydraulic valve group can control the opening and closing of the connecting chamber of the first pumping hydraulic cylinder and the second pumping hydraulic cylinder, the connecting chamber hydraulic pump and the return oil circuit. When the connecting chamber of the first pumping hydraulic cylinder and the second pumping hydraulic cylinder is connected to the return oil circuit, the hydraulic oil in the connecting chamber flows back to the oil tank through the return oil circuit. When the first pumping hydraulic cylinder and the second pumping hydraulic cylinder are connected to the return oil circuit, the hydraulic oil in the connecting chamber flows back to the oil tank through the return oil circuit. When the connecting chamber of the connecting chamber is connected with the connecting chamber hydraulic pump, the hydraulic oil pumped out by the connecting chamber hydraulic pump enters the connecting chamber of the first pumping hydraulic cylinder and the second pumping hydraulic cylinder, so that the suction piston retreats quickly; the first pumping hydraulic valve group is simultaneously connected to the non-connecting chamber of the first pumping hydraulic cylinder, the pumping hydraulic pump and the return oil pipeline through the oil circuit, and the first pumping hydraulic valve group can control the opening and closing of the oil circuit between the non-connecting chamber of the first pumping hydraulic cylinder and the pumping hydraulic pump, as well as the opening and closing of the non-connecting chamber of the first pumping hydraulic cylinder and the return oil pipeline; the second pumping hydraulic valve group is simultaneously connected to the non-connecting chamber of the second pumping hydraulic cylinder, the pumping hydraulic pump and the return oil pipeline The through cavity, the pumping hydraulic pump and the return oil pipeline are connected through the oil circuit. The second pumping hydraulic valve group can control the opening and closing of the oil circuit between the non-connected cavity of the second pumping hydraulic cylinder and the pumping hydraulic pump, as well as the opening and closing of the non-connected cavity of the second pumping hydraulic cylinder and the return oil pipeline; the first feed hydraulic valve group is connected to the first feed valve driving cylinder to control the opening and closing of the first feed valve; the second feed hydraulic valve group is connected to the second feed valve driving cylinder to control the opening and closing of the second feed valve; the discharge hydraulic valve group is connected to the discharge valve driving cylinder to control the alternating opening and closing of the two flow holes of the discharge valve.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. Since the mating surface (sealing surface) of the cover plate fits the mating surface (sealing surface) of the fluid flow, when the sliding shear cover plate valve is closed, the edge of the cover plate and the opening of the flow hole of the fluid flow form a shearing motion, that is, the edge of the cover plate and the opening of the flow hole of the fluid flow form a shearing edge. Thus, various block materials and / or fibrous materials that block the closure of the flow hole can be cut off and the closing action can be completed to cut off the flow hole of the fluid flow. This makes the sliding shear cover plate valve of the utility model suitable for pumping materials containing block impurities and fibrous impurities.

[0022] 2. Since the projection of the end face of the flow hole of the fluid on the sealing surface of the cover plate is all located inside the sealing surface of the cover plate, a covering blockage of the flow hole of the fluid is formed, which makes it have extremely strong one-way sealing performance. The greater the pressure of the logistics on the cover plate, the greater the fit between the sealing surface of the cover plate and the sealing surface of the fluid, and the tighter the seal, which not only allows the pumping pressure to be set very high, thereby greatly increasing the conveying distance, but also overcomes the problem of traditional conveying pumps that the reversing valve is not closed tightly, causing the material to flow back and erode the reversing valve, thereby causing damage to the reversing valve and equipment failure due to pumping pressure loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic front view of a sliding shear cover valve according to an embodiment of the utility model.

[0024] Figure 2 is based on Figure 1 AA section view.

[0025] Figure 3 It is a front view of a sliding shear cover valve according to a second preferred embodiment of the first purpose of the utility model.

[0026] Figure 4 is based on Figure 3 A partial enlarged view of point E.

[0027] Figure 5 is based on Figure 3 AA section view.

[0028] Figure 6 It is a stereoscopic diagram of a delivery pump according to a preferred embodiment of the second purpose of the utility model.

[0029] Figure 7 is based on Figure 6 A front view of a delivery pump according to a preferred embodiment of the second object of the present invention.

[0030] Figure 8 is based on Figure 6 A top view of a delivery pump according to a preferred embodiment of the second object of the present invention.

[0031] Fig. 9 is based on Figure 6 A hydraulic principle diagram of a delivery pump in a preferred embodiment of the second object of the present invention.

[0032] In the figure: 1 fluid, 2 cover plate, 3 driving device, 4 drag body, 5 elastic body, 6 sliding shear cover valve, 7 pumping cylinder, 8 pumping hydraulic cylinder, 61 feed valve, 62 discharge valve, 611 first feed valve, 612 second feed valve, 71 first pumping cylinder, 72 second pumping cylinder, 81 first pumping hydraulic cylinder, 82 second pumping hydraulic cylinder, 10 pumping hydraulic pump, 11 connecting cavity hydraulic pump, 12 connecting cavity hydraulic valve group, 13 first pumping hydraulic valve group, 14 second pumping hydraulic valve group, 15 first feed hydraulic valve group, 16 second feed hydraulic valve group, 17 discharge hydraulic valve group, 6111 driving cylinder, 6121 driving cylinder, 621 driving cylinder. DETAILED DESCRIPTION

[0033] In the drawings, the same or similar reference numerals are used to represent the same or similar elements or elements with the same or similar functions. The embodiments of the present utility model are described in detail below in conjunction with the drawings.

[0034] In the description of the present invention, the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "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 should not be understood as limiting the scope of protection of the present invention.

[0035] Figure 1 and Figure 2 A schematic structural diagram of a sliding shear cover valve according to the first embodiment of the utility model is shown.

[0036] The sliding shear cover valve comprises a flow body 1 , a cover plate 2 , a driving device 3 , a dragging body 4 and an elastic body 5 .

[0037] The sliding shear cover valve has a sliding cover plate 2 and a fluid body 1 with a flow hole, and the cover plate 2 can cover the flow hole of the fluid body 1 and thereby close the valve (i.e., close the sliding shear cover valve). The sliding shear cover valve can open the valve by laterally moving the cover plate 2 away from the position covering the flow hole. When closing the valve, the sliding shear cover valve can make the edge of the cover plate 2 and the edge of the orifice of the flow hole of the fluid body 1 cooperate with each other to shear the material that blocks the sliding of the cover plate 2. Moreover, when the valve is closed, the contact lines between the flow hole of the fluid body 1 and the cover plate 2 are all located within the second matching surface of the cover plate 2, so that the cover plate 2 completely covers the flow hole of the fluid body 1.

[0038] As shown in the figure, the flow passage 1 has a flow hole that passes through the flow passage for fluid circulation, and a first mating surface is provided at one end of the flow hole. The first mating surface fits with the second mating surface of the cover plate 2 to form a sealing structure, and the cover plate 2 can slide in a state where the first mating surface of the flow passage fits with the second mating surface of the cover plate 2, thereby covering the flow hole or moving away from the flow hole to achieve the closing or opening of the sliding shear cover valve. In the illustrated embodiment, the flow passage 1 is flat and is independently provided from the valve body (valve housing), but the utility model is not limited thereto. For example, the flow passage 1 can be provided as a flat plane only at the first mating surface, and the shapes of other parts can be provided as needed. For another example, the flow passage 1 can also be provided as an integral body with the valve housing.

[0039] The cover plate 2 is adjacent to the fluid flow passage, and is used to cover the flow hole of the fluid flow passage or to move away from the flow hole of the fluid flow passage, so as to realize the closing or opening of the sliding shear cover plate valve. The cover plate 2 is provided with a boss and a second mating surface. The second mating surface is a plane, and is matched with the first mating surface of the fluid flow passage 1. The boss is provided on the side away from the second mating surface, and is used to connect with the driving device 3 or the dragging body 4.

[0040] When the cover plate 2 covers the fluid flow hole, the portion of the fluid flow hole on the first mating surface is completely located in the second mating surface of the cover plate 2. During the sliding process of the cover plate 2 toward the fluid flow hole, when the outer edge of the cover plate 2 intersects with the edge of the fluid flow hole, the material that blocks its sliding will be sheared, thereby removing the obstacle and allowing the cover plate 2 to completely cover the fluid flow hole. The boss of the cover plate 2 is located in the mounting hole of the dragging body, so that the dragging body can drag the cover plate 2 through the mounting hole. When the cover plate 2 is dragged, it maintains contact with the fluid 1. In other words, the first mating surface of the fluid and the second mating surface of the cover plate 2 remain in contact.

[0041] In an optional embodiment, the driving device 3 is a hydraulic cylinder, and any other appropriate driving device may be used, for example, a rotary driving device may be used to drive the cover plate 2 by rotation, which is also within the protection scope of the present utility model. The driving device 3 is indirectly connected to the cover plate 2 through the dragging body 4, and is used to drive the cover plate 2 to slide in a state where the first mating surface of the fluid flow 1 and the second mating surface of the cover plate 2 are in contact, thereby covering the flow hole of the fluid flow or moving away from the flow hole of the fluid flow, and providing the cover plate 2 and the fluid flow 1 with power to shear the material.

[0042] The dragging body 4 is connected to the driving device 3 and can move left and right along a straight line parallel to the first mating surface of the flow passage 1 under the drive of the driving device 3. A through mounting hole is also provided on it, which is used to drag the cover plate 2 so that the cover plate 2 can slide when the first mating surface of the flow passage 1 is in contact with the second mating surface of the cover plate 2, so as to open or close the flow hole of the flow passage 1.

[0043] The elastic body 5 is located in the mounting hole of the drag body 4 and between the drag body 4 and the cover plate 2. The elastic body 5 pushes the cover plate 2 toward the flow body 1 through elastic force, so that the first mating surface of the flow body 1 and the second mating surface of the cover plate 2 are closely fitted.

[0044] The driving device 3 is connected to the dragging body 4, and the dragging body 4 is connected to the cover plate 2. The elastic body 5 is located between the dragging body 4 and the cover plate 2. One end of the elastic body 5 contacts the dragging body 4, and the other end contacts the cover plate 2. The flow-through body 1 is provided with a flow-through hole and a first matching surface, and the cover plate 2 is provided with a second matching surface. The elastic body 5 pushes the cover plate 2 toward the flow-through body 1, so that the first matching surface of the flow-through body 1 and the second matching surface of the cover plate 2 fit together. The driving device 3 drives the dragging body 4 and drives the cover plate 2 through the dragging body 4, so that the cover plate 2 can move along the first matching surface with the flow-through body 1. The cover plate 2 reciprocates in a straight line direction parallel to the mating surface, thereby covering the flow hole of the fluid 1 or moving away from the flow hole of the fluid 1. When the cover plate 2 covers the flow hole of the fluid 1, the flow hole openings of the flow hole of the fluid 1 on its first mating surface are all located in the second mating surface of the cover plate 2. The mounting hole of the dragging body is a through hole, so that the material can contact the cover plate 2. The pressure of the material on the cover plate 2 makes the second mating surface of the cover plate 2 fit more tightly with the first mating surface of the fluid 1, and the higher the pressure, the tighter the cover plate 2 fits with the fluid 1 and the tighter the seal.

[0045] In the process of closing the through-flow hole through which the fluid 1 passes, the cover plate 2 and the through-flow hole through which the fluid 1 passes form a shearing motion, and can shear the obstruction.

[0046] Figure 3 , Figure 4 and Figure 5 A schematic structural diagram of a sliding shear cover valve according to another embodiment of the utility model is shown.

[0047] The sliding shear cover valve of this embodiment includes a flow body 1, a cover plate 2, a driving device 3, a dragging body 4 and an elastic body 5. The driving device 3 is connected to the dragging body 4, which is in turn connected to the cover plate 2. The elastic body 5 is located between the dragging body 4 and the cover plate 2. The flow body 1 has two flow holes and a first mating surface. Thus, two-way valve control can be achieved. More flow holes can be set on the flow body as needed, which is also within the protection scope of the utility model.

[0048] Correspondingly, the cover plate 2 has a second mating surface. The elastic body 5 pushes the cover plate 2 toward the fluid flow 1, so that the first mating surface of the fluid flow 1 and the second mating surface of the cover plate 2 fit together. The driving device 3 drives the dragging body 4 and drives the cover plate 2 through the dragging body 4, so that the cover plate 2 can move along a straight line parallel to the first mating surface of the fluid flow 1, thereby alternately opening or closing the two through-flow holes on the fluid flow 1. When the cover plate 2 covers the first through-flow hole of the fluid flow 1, the through-flow hole openings of the through-flow hole of the fluid flow 1 on its first mating surface are all located in the second mating surface of the cover plate 2. The dragging body 4 has a mounting hole, and the mounting hole is a through hole. Through the mounting hole, the pressure of the material on the cover plate 2 makes the second mating surface of the cover plate 2 fit more tightly with the first mating surface of the fluid flow 1, and the higher the pressure, the tighter the cover plate 2 fits with the fluid flow 1, and the tighter the seal. When the cover plate 2 covers the second through-flow hole of the fluid flow 1, the through-flow hole openings of the through-flow hole of the fluid flow 1 on the first mating surface are all located in the second mating surface of the cover plate 2.

[0049] In the process of closing any one of the through-flow holes of the fluid flow passage 1 , the cover plate 2 and the edge of the through-flow hole of the fluid flow passage 1 form a shearing motion, and can shear the obstruction.

[0050] In the illustrated embodiment, when the first through hole is opened, the second through hole is closed; correspondingly, when the second through hole is opened, the first through hole is closed. In other words, the two through holes are opened and closed alternately. The two through holes can also be opened or closed synchronously.

[0051] Figure 6 , Figure 7 , Figure 8 and Fig. 9 A schematic structural diagram of a delivery pump according to an embodiment of the utility model is shown.

[0052] The conveying pump of this embodiment includes a first feed valve 611, a second feed valve 612, a discharge valve 62, a first pumping cylinder 71, a second pumping cylinder 72, a first pumping hydraulic cylinder 81 and a second pumping hydraulic cylinder 82, a connecting chamber hydraulic pump 11, a connecting chamber hydraulic valve group 12, a first pumping hydraulic valve group 13, a second pumping hydraulic valve group 14, a first feed hydraulic valve group 15, a second feed hydraulic valve group 16, and a discharge hydraulic valve group 17.

[0053] The first feed valve 611 further includes a first feed valve driving cylinder 6111, which is used to drive the opening and closing of the first feed valve 611; the second feed valve 612 further includes a second feed valve driving cylinder 6121, which is used to drive the opening and closing of the second feed valve 612; the discharge valve 62 further includes a discharge valve driving cylinder 621, which is used to drive the discharge valve 62 so that its two flow holes are alternately opened and closed.

[0054] The first pumping hydraulic cylinder 81, the first pumping cylinder 71 and the first feed valve 611 are connected in sequence to form a first pumping unit; the second pumping hydraulic cylinder 82, the second pumping cylinder 72 and the second feed valve 612 are connected in sequence to form a second pumping unit; the first pumping unit and the second pumping unit are also connected to the discharge valve 62 at the same time.

[0055] The first pumping hydraulic cylinder 81 and the second pumping hydraulic cylinder 82 are connected in parallel, and the connecting chamber is connected to the connecting chamber hydraulic valve group 12 through an oil circuit, and the connecting chamber hydraulic valve group 12 is connected to the return oil pipeline and the connecting chamber hydraulic pump 11 through an oil circuit; the connecting chamber hydraulic valve group 12 can control the opening and closing of the connecting chambers of the first pumping hydraulic cylinder 81 and the second pumping hydraulic cylinder 82 and the return oil circuit, as well as the opening and closing of the connecting chamber hydraulic pump 11. When the connecting chamber is connected to the return oil circuit, the hydraulic oil in the connecting chamber flows back to the oil tank through the return oil circuit; when the return oil circuit of the connecting chamber is connected to the connecting chamber hydraulic pump 11, the hydraulic oil pumped out by the connecting chamber hydraulic pump 11 enters the connecting chamber, causing the suction piston to retreat quickly; the first pumping hydraulic cylinder 81 and the second pumping hydraulic cylinder 82 are connected to the return oil circuit, and the connecting chamber hydraulic pump 11 is connected to the return oil circuit. The valve group 13 is simultaneously connected to the non-connected chamber of the first pumping hydraulic cylinder 81, the pumping hydraulic pump 10 and the return oil pipeline through the oil circuit. The first pumping hydraulic valve group 13 can control the opening and closing of the oil circuit between the non-connected chamber of the first pumping hydraulic cylinder 81 and the pumping hydraulic pump 10, as well as the opening and closing of the non-connected chamber of the first pumping hydraulic cylinder 81 and the return oil pipeline; the second pumping hydraulic valve group 14 is respectively connected to the non-connected chamber of the second pumping hydraulic cylinder 82, the pumping hydraulic pump 10 and the return oil pipeline through the oil circuit. The second pumping hydraulic valve group 14 can control the opening and closing of the oil circuit between the non-connected chamber of the second pumping hydraulic cylinder 82 and the pumping hydraulic pump 10, as well as the opening and closing of the non-connected chamber of the second pumping hydraulic cylinder 82 and the return oil pipeline.

[0056] The first feed hydraulic valve group 16 is connected to the first feed valve driving cylinder 6111 of the first feed valve 611, and is used to control the opening and closing of the first feed valve 611; the second feed hydraulic valve group 15 is connected to the second feed valve driving cylinder 6121 of the second feed valve 612, and is used to control the opening and closing of the second feed valve 612; the discharge hydraulic valve group 17 is connected to the discharge valve driving cylinder 621 of the discharge valve 62, and is used to control the opening and closing of the two flow holes of the discharge valve 62.

[0057] The working process of the delivery pump is as follows.

[0058] Process 1: The first pumping unit pumps, the second pumping unit sucks and quickly retreats

[0059] When the channel between the discharge valve 62 and the second pumping unit is completely closed, the first feed valve 611 is closed, the second feed valve 612 is opened, the discharge valve 62 is connected to the flow hole of the first pumping unit and the flow hole of the second pumping unit is closed, the connecting chamber of the first pumping hydraulic cylinder 81 and the second pumping hydraulic cylinder 82 is connected to the connecting chamber hydraulic pump 11, the hydraulic oil pumped out by the connecting chamber hydraulic pump 11 enters the connecting chamber, the non-connecting chamber of the first pumping hydraulic cylinder 81 is connected to the pumping hydraulic pump 10, and the non-connecting chamber of the second pumping hydraulic cylinder 82 is connected to the return oil pipeline, the first pumping unit pumps forward and the second pumping unit retreats to absorb material.

[0060] Step 2: The first pumping unit continues pumping, and the second pumping unit stops

[0061] After the second pumping unit retreats to its position, the communicating chambers of the first pumping hydraulic cylinder 81 and the second pumping hydraulic cylinder 82 are connected to the oil return line, the second feed valve 612 is closed, the second pumping unit stops, and the first pumping unit continues to move forward to pump.

[0062] Step 3: Pumping by the first pumping unit, pumping by the second pumping unit

[0063] When the first pumping unit moves forward to the set position, the discharge valve 62 starts to reverse, and at the same time, the oil circuit between the non-connected chamber of the first pumping hydraulic cylinder 82 and the pumping hydraulic pump 10 is connected, the oil circuit between the non-connected chamber of the second pumping hydraulic cylinder 82 and the pumping hydraulic pump 10 is connected, and the connecting chambers of the first pumping hydraulic cylinder 81 and the second pumping hydraulic cylinder 82 are connected to the return oil circuit. As the flow area between the discharge valve 62 and the first pumping unit gradually decreases and the flow area between the second pumping unit gradually increases, the first pumping unit moves forward slower and slower, and the second pumping unit moves forward faster and faster.

[0064] Process 4: The first pumping unit sucks the material and quickly retreats, and the second pumping unit pumps

[0065] When the passage between the discharge valve 62 and the first pumping unit is completely closed, the first pumping unit stops moving forward, and the second pumping unit moves forward at full speed, completing the pumping switch between the first pumping unit and the second pumping unit. Then, the first feed valve 611 opens, the connecting chambers of the first pumping hydraulic cylinder 81 and the second pumping hydraulic cylinder 82 are connected to the connecting chamber hydraulic pump 11, the non-connecting chamber of the first pumping hydraulic cylinder 81 is connected to the return oil circuit, and the non-connecting chamber of the second pumping hydraulic cylinder 81 is connected to the oil circuit between the pumping hydraulic pump 10, the first pumping unit retreats to absorb the material, and the second pumping unit moves forward to pump.

[0066] Step 5: The first pumping unit stops and the second pumping unit continues pumping

[0067] The first pumping unit retreats to its proper position, the first feed valve 611 is closed, the first pumping unit stops, and the second pumping unit continues to move forward to pump.

[0068] Step 6: Pumping by the first pumping unit, pumping by the second pumping unit

[0069] When the second pumping unit moves forward to the set position, the discharge valve 62 starts to reverse, and at the same time, the oil circuit between the non-connected chamber of the first pumping hydraulic cylinder 81 and the pumping hydraulic pump 10 is connected, the oil circuit between the non-connected chamber of the second pumping hydraulic cylinder 82 and the pumping hydraulic pump 10 is connected, and the connecting chambers of the first pumping hydraulic cylinder 81 and the second pumping hydraulic cylinder 82 are connected to the return oil circuit. As the flow area between the discharge valve 62 and the second pumping unit gradually decreases, and the flow area between the discharge valve 62 and the first pumping unit gradually increases, the second pumping unit moves forward slower and slower, and the first pumping unit moves forward faster and faster.

[0070] The above steps 1 to 6 are repeated to realize continuous pumping operation of the delivery pump.

[0071] The delivery pump of the utility model can achieve the following advantages.

[0072] When the pumping cylinder starts to suck material, the pressure in the suction chamber decreases, the positive pressure between the cover plate of the feed valve and the fluid is reduced, and the friction between the cover plate and the fluid is very small. The cover plate can be moved away from the flow hole of the fluid with a small force, so that the suction flow channel can be easily opened. When the suction is completed and the suction channel needs to be closed, the pressure of the material on the cover plate is also very small, and the force driving the cover plate to move and close the flow hole of the fluid is also very small. Therefore, the suction valve can be opened and closed flexibly and quickly, and because the positive pressure is extremely small, the wear of the cover plate and the fluid is also extremely small, and the service life is very long.

[0073] When the pumping cylinder starts to discharge, the pressure in the suction chamber increases, the pressure difference on both sides of the cover plate of the discharge valve becomes smaller, the positive pressure between it and the fluid decreases, and the friction between the cover plate and the fluid is very small. With a small force, the cover plate can be moved from one flow hole of the fluid to another flow hole, so that the two flow holes can be easily switched on and off. Therefore, the discharge valve can be opened and closed flexibly and quickly. In addition, due to the extremely small positive pressure, the wear of the cover plate and the fluid is extremely small, and the service life is long.

[0074] Through the coordinated logical action of two pumping hydraulic cylinders, two suction valves and one discharge valve, a seamless and smooth transition of the pumping of the two pumping hydraulic cylinders is realized, thereby achieving pulsation-free pressure and flow of the output material, eliminating the adverse effects of pressure pulsation shock on machine parts, and improving the fatigue life of equipment. It meets the needs of various pulse-free pipeline transportation projects, such as the pipeline transportation of slurry, oil, and tailings for tens or even hundreds of kilometers, and reduces the probability of blocking the conveying pipeline by filling materials in mine filling projects.

[0075] Since there is no material backflow, the defect that S-tube valve pumps cannot be used in parallel is overcome. Multiple delivery pumps can be used in parallel without interfering with each other, meeting the needs of large-flow pumping projects.

[0076] Since the switch of the cover plate of the discharge valve between the two flow holes for passing the fluid is a gradual process, the pumping switch of the two pumping cylinders is smoother and the discharge pressure fluctuation is smaller.

[0077] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Those skilled in the art should understand that the technical solutions described in the above embodiments can be modified, or some of the technical features can be replaced by equivalents; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A sliding shear cover valve, characterized in that: include: A flow passage (1) having a first mating surface at one end thereof, a flow hole being provided in the flow passage (1), the flow hole penetrating the flow passage (1) and penetrating the first mating surface; A cover plate (2) is provided with a second mating surface at one end thereof, the second mating surface being adapted to fit with the first mating surface of the flow passage (1), the cover plate (2) being able to move between an open position and a closed position relative to the flow passage (1); in the closed position, the cover plate (2) is aligned with the flow passage hole, covers and closes the flow passage hole, and cuts off the flow passage of the valve; in the open position, the cover plate (2) leaves the closed position and opens the flow passage hole; A driving device (3), the driving device (3) being connected to the cover plate (2) and being used for driving the cover plate (2) to move between the open position and the closed position; In the process of the cover plate (2) closing the flow hole of the fluid (1), the cover plate (2) and the fluid (1) slide relative to each other, and the edge of the cover plate (2) and the edge of the opening of the flow hole of the fluid (1) can shear the material that blocks the closure, thereby avoiding the failure of closure due to the obstruction of the obstruction; when the cover plate (2) is in the closed position, the opening of the closed flow hole of the fluid (1) in contact with the cover plate (2) are all located within the second matching surface of the cover plate (2), and the pressure of the material directly presses the cover plate (2) against the fluid (1), so that the first matching surface of the fluid (1) and the second matching surface of the cover plate (2) are tightly fitted, and the greater the pressure of the material, the tighter the two fitting surfaces fit, and the tighter the seal.

2. The sliding shear cover valve according to claim 1, characterized in that: It also comprises a dragging body (4), and the driving device (3) is connected to and drives the cover plate (2) via the dragging body (4).

3. The sliding shear cover valve according to claim 2, characterized in that: It also includes an elastic body (5), which applies an elastic force to the cover plate (2) toward the fluid flow body (1), so that the second mating surface is kept in contact with the first mating surface, and compensates for the wear of the first mating surface of the fluid flow body (1) and the second mating surface of the cover plate (2), so that even after wear, the first mating surface of the fluid flow body (1) and the second mating surface of the cover plate (2) can still be closely fitted together, thereby ensuring the reliability of the fitting seal.

4. The sliding shear cover valve according to claim 2, characterized in that: The dragging body (4) is provided with a mounting hole, and the mounting hole is a through hole. The cover plate (2) is located at one end of the mounting hole of the dragging body (4) and is connected to the dragging body (4). The elastic body (5) is located in the mounting hole of the dragging body (4) and is in contact with the dragging body (4) and the cover plate (2) at the same time. The mounting hole of the dragging body (4) is used to connect the elastic body (5) and the cover plate (2) on the one hand, and on the other hand, enables the pressure of the material to act on the cover plate (2) through the mounting hole and push the cover plate (2) toward the fluid (1). The greater the material pressure, the greater the sealing pressure between the cover plate (2) and the fluid (1), and the better the sealing performance.

5. The sliding shear cover valve according to any one of claims 1 to 3, characterized in that: The flow passage (1) has two flow holes, and the cover plate (2) can slide relative to the flow passage (1) so as to alternately open or close the two flow holes, thereby switching the material flow passage, and the open position and closed position of the cover plate (2) relative to one flow hole of the flow passage (1) are the closed position and open position relative to the other flow hole.

6. The sliding shear cover valve according to claim 4, characterized in that: The flow passage (1) has two flow holes, and the cover plate (2) can slide relative to the flow passage (1) so as to alternately open or close the two flow holes, thereby switching the material flow passage, and the open position and closed position of the cover plate (2) relative to one flow hole of the flow passage (1) are the closed position and open position relative to the other flow hole.

7. A delivery pump, characterized in that: It comprises a feed valve (61) and / or a discharge valve (62), wherein the feed valve (61) and / or the discharge valve (62) is a sliding shear cover valve (6) according to any one of claims 1 to 6.

8. The delivery pump according to claim 7, characterized in that: The delivery pump comprises a feed valve (61) and a discharge valve (62), wherein the feed valve (61) and the discharge valve (62) are the sliding shear cover valve (6), The pumping cylinder (7) is connected to the feed valve (61), which is in turn connected to the discharge valve (62). The cavity between the feed valve (61), the discharge valve (62) and the pumping cylinder (7) is a valve chamber. The cover plate (2) on the feed valve (61) is located on one side inside the valve chamber, and the cover plate (2) on the discharge valve (62) is located on one side outside the valve chamber (9).

9. The delivery pump according to claim 8, characterized in that: The feed valve (61) comprises a first feed valve (611) and a second feed valve (612), wherein the first feed valve (611) and the second feed valve (612) are both the sliding shear cover valves, the pumping cylinder (7) comprises a first pumping cylinder (71) and a second pumping cylinder (72), the pumping hydraulic cylinder (8) comprises a first pumping hydraulic cylinder (81) and a second pumping hydraulic cylinder (82), the first pumping hydraulic cylinder (81) and the first pumping hydraulic cylinder (82) are connected to each other. The first pumping cylinder (71) is connected to the first feed valve (611), the first feed valve (611) is further connected to the discharge valve (62), the second pumping hydraulic cylinder (82) is connected to the second pumping cylinder (72), the second pumping cylinder (72) is connected to the second feed valve (612), the second feed valve (612) is further connected to the discharge valve (62), and the flow passage of the discharge valve (62) has two flow holes.

10. The delivery pump according to claim 9, characterized in that The invention also includes a pumping hydraulic pump (10), a connecting chamber hydraulic pump (11), a connecting chamber hydraulic valve group (12), a first pumping hydraulic valve group (13), a second pumping hydraulic valve group (14), a first feed hydraulic valve group (15), a second feed hydraulic valve group (16) and a discharge hydraulic valve group (17); the first feed valve (611) further includes a first feed valve driving cylinder (6111) for driving and controlling the opening and closing of the first feed valve (611); the second feed valve (612) further includes a second feed valve driving cylinder (6121) for driving and controlling the opening and closing of the second feed valve (612); the discharge valve (62) further includes a discharge valve driving cylinder (621) for driving and controlling the opening and closing of the discharge valve (621). ), the first pumping hydraulic cylinder (81) and the second pumping hydraulic cylinder (82) are connected in parallel and the connecting chamber is connected to the connecting chamber hydraulic valve group (12) through an oil circuit, and the connecting chamber hydraulic valve group (12) is connected to the return oil pipeline and the connecting chamber hydraulic pump (11) through an oil circuit; the connecting chamber hydraulic valve group (12) can control the opening and closing of the connecting chamber of the first pumping hydraulic cylinder (81) and the second pumping hydraulic cylinder (82) and the connecting chamber hydraulic pump (11) and the return oil circuit; when the connecting chamber of the first pumping hydraulic cylinder (81) and the second pumping hydraulic cylinder (82) is connected to the return oil circuit, the hydraulic oil in the connecting chamber flows back to the oil tank through the return oil circuit; when the connecting chamber of the first pumping hydraulic cylinder (81) and the second pumping hydraulic cylinder (82) is connected to the return oil circuit, the hydraulic oil in the connecting chamber flows back to the oil tank through the return oil circuit; When the connecting chamber of the first pumping hydraulic cylinder (81) and the connecting chamber hydraulic pump (11) are connected, the hydraulic oil pumped out by the connecting chamber hydraulic pump (11) enters the connecting chambers of the first pumping hydraulic cylinder (81) and the second pumping hydraulic cylinder (82), so that the suction piston quickly retreats; the first pumping hydraulic valve group (13) is simultaneously connected to the non-connecting chamber of the first pumping hydraulic cylinder (81), the pumping hydraulic pump (10) and the return oil pipeline through the oil circuit, and the first pumping hydraulic valve group (13) can control the opening and closing of the oil circuit between the non-connecting chamber of the first pumping hydraulic cylinder (81) and the pumping hydraulic pump (10) and the opening and closing of the non-connecting chamber of the first pumping hydraulic cylinder (81) and the return oil pipeline; the second pumping hydraulic valve group (14) is simultaneously connected to the non-connecting chamber of the second pumping hydraulic cylinder (82), the pumping hydraulic pump (10) and the return oil pipeline The hydraulic pump (10) and the oil return pipeline are connected via an oil circuit, and the opening and closing of the oil circuit between the non-connected chamber of the second pumping hydraulic cylinder (82) and the pumping hydraulic pump (10) and the opening and closing of the non-connected chamber of the second pumping hydraulic cylinder (82) and the oil return pipeline can be controlled via the second pumping hydraulic valve group (14); the first feed hydraulic valve group (15) is connected to the first feed valve driving cylinder (6111) and is used to control the opening and closing of the first feed valve (611); the second feed hydraulic valve group (16) is connected to the second feed valve driving cylinder (6121) and is used to control the opening and closing of the second feed valve (612); the discharge hydraulic valve group (17) is connected to the discharge valve driving cylinder (621) and is used to control the alternating opening and closing of the two flow holes of the discharge valve (62).

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