A lift valve pump

Abstract

The present invention discloses a lifting valve pump, including an actuator part, a hydraulic power part and an electrical control part; the actuator part includes a discharge chamber, a feed chamber, a washing chamber, two main oil cylinders for pushing materials, two material cylinders, and four switching valve switch oil cylinders; two transversely placed main oil cylinders for pushing materials are installed at the right end of the chassis, and the left ends of the two main oil cylinders for pushing materials are respectively fixedly connected to the washing chamber, and two transversely placed material cylinders are installed at the left end of the chassis, and the right ends of the two material cylinders are respectively fixedly connected to the washing chamber; the output end of the switching valve switch oil cylinder is connected to a blocking piston. The lifting valve pump is reasonably designed, and can realize the long-distance, high-lift transportation of paste materials using pipelines without backflow, and has the advantages of low failure rate, simple use and convenient maintenance, few wear parts, low maintenance cost, good sealing effect, etc.

Description

Technical Field

[0001] The invention relates to the technical field of paste conveying, in particular to a lift valve pump. Background Art

[0002] The existing paste pump can only realize short-distance transportation of paste materials in pipelines, and cannot realize transportation over longer distances and with larger lifts. In addition, there is a backflow phenomenon when changing direction. The longer the transportation distance, the greater the lift, and the more serious the backflow, which reduces the transportation efficiency. Especially for the long-distance transportation of highly compressible paste materials (sludge, coal slime), the backflow is serious and the efficiency is low.

[0003] Existing paste pumps mainly use S-shaped swing valves to frequently change direction for suction and discharge. There are many sealing structures and moving parts. The overall equipment has many wearing parts, a high failure rate, and high maintenance costs. In addition, if materials are transported over long distances and at high lifts, the paste pump will experience backflow of materials when the S-shaped swing valve changes direction. The longer the distance, the more serious the backflow phenomenon, and the paste material cannot be effectively transported to the designated location through the pipeline.

[0004] Therefore, the present invention provides a lift valve pump which can realize long-distance and high-lift transportation of paste materials by pipeline. Summary of the invention

[0005] The object of the present invention is to provide a lift valve pump to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A lifting valve pump comprises an actuator part; the actuator part comprises a discharge chamber, a feed chamber, a washing chamber, two main oil cylinders for pushing materials, two material cylinders, and four switching valve switch cylinders; the four switching valve switch cylinders are two discharge chamber switching valve switch cylinders and two feed chamber switching valve switch cylinders; two transversely placed main oil cylinders for pushing materials are installed at the right end of the base frame, the two main oil cylinders for pushing materials are arranged up and down, and the left ends of the two main oil cylinders for pushing materials are respectively fixedly connected to the washing chamber, and two transversely placed material cylinders are installed at the left end of the base frame, the two material cylinders are arranged up and down, and the right ends of the two material cylinders are respectively fixedly connected to the washing chamber, and two transversely placed material cylinders are installed at the left end of the base frame, The two ends are fixedly connected to the washing chamber respectively, and the main pushing oil cylinder corresponds to the material cylinder on the left and right one by one; the left ends of the two material cylinders are fixedly connected to the feeding chamber, on which two feeding chamber switching valve switch oil cylinders are installed, and the left end of the feeding chamber is fixedly connected to the discharging chamber, on which two discharging chamber switching valve switch oil cylinders are installed, and the left end of the discharging chamber is fixedly connected to the discharging pipe; a discharging chamber port is provided on the discharging chamber, and the output ends of the two discharging chamber switching valve switch oil cylinders are connected to the blocking piston; a feeding chamber port is provided on the feeding chamber, and the output ends of the two feeding chamber switching valve switch oil cylinders are also connected to the blocking piston.

[0008] As a further solution of the present invention: it also includes a hydraulic power part and an electrical control part.

[0009] As a further solution of the present invention: the blocking piston includes a piston support, a piston pressure cover and a piston retaining ring; the piston support is fixedly connected to the piston pressure cover, the piston pressure cover is fixedly connected to the output end of the switching cylinder of the switching valve, and a sealing groove for sealing the discharge chamber opening or the feed chamber opening is provided on the piston support, and a piston retaining ring is provided between the piston support and the piston pressure cover.

[0010] As a further solution of the present invention: the outer side of the piston retaining ring is folded downward.

[0011] As a further solution of the present invention: the discharge chamber adopts a herringbone tube structure.

[0012] As a further solution of the present invention: the blocking piston adopts a conical structure.

[0013] As a further solution of the present invention: the base frame includes a left bracket vertically at the left end, a base in the middle and a right bracket vertically at the right end, and the lower ends of the left bracket and the right bracket are fixedly connected to the base; two horizontally placed main oil cylinders for pushing materials are installed on the right bracket, and two horizontally placed material cylinders are installed on the left bracket.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The lifting valve pump is reasonably designed, which can realize the long-distance and high-lift transportation of paste materials through pipelines, and has the following advantages: First, the structure is simple and reliable, with few moving parts, low failure rate and simple use; second, the dynamic blocking piston adopts a tapered piston structure, and the blocking piston and piston retaining ring are made of special materials, which are wear-resistant and have good sealing effect. It can build up a relatively high outlet pressure to meet the transportation requirements of ultra-long distance and ultra-high altitude; third, the discharge chamber adopts a streamlined design of "human" pipe structure, so that the paste material is streamlined, with good sealing performance, no mechanical obstruction to discharge, small material flow resistance, high volumetric efficiency, and can pump materials with larger solid particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the front view of the lift valve pump.

[0017] Figure 2 A side view of a poppet valve pump.

[0018] Figure 3 This is one of the schematic diagrams of the lift valve pump.

[0019] Figure 4 This is the second schematic diagram of the lift valve pump.

[0020] Figure 5It is a schematic diagram of the assembly structure of the feed chamber in the lift valve pump.

[0021] Among them: 1-discharging pipe; 2-discharging chamber switching valve switch cylinder; 3-discharging chamber; 4-feeding chamber; 5-base frame; 6-material cylinder; 7-washing chamber; 8-pushing main cylinder; 9-feeding chamber switching valve switch cylinder; 10-blocking piston; 11-piston support; 12-piston pressure cover; 13-piston retaining ring. DETAILED DESCRIPTION

[0022] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0023] See also Figure 1-5 , a lifting valve pump, including an actuator part, a hydraulic power part and an electrical control part; the actuator part includes a discharge chamber 3, a feed chamber 4, a washing chamber 7, two main pusher oil cylinders 8, two material cylinders 6, and four switching valve switch oil cylinders; the four switching valve switch oil cylinders are two discharge chamber switching valve switch oil cylinders 2 and two feed chamber switching valve switch oil cylinders 9;

[0024] The base frame 5 includes a left bracket vertically at the left end, a base in the middle and a right bracket vertically at the right end. The lower ends of the left bracket and the right bracket are fixedly connected to the base. Two transversely placed main pushing cylinders 8 are installed on the right bracket. The two main pushing cylinders 8 are arranged up and down. The left ends of the two main pushing cylinders 8 are respectively fixedly connected to the washing chamber 7. Two transversely placed material cylinders 6 are installed on the left bracket. The two material cylinders 6 are arranged up and down. The right ends of the two material cylinders 6 are respectively fixedly connected to the washing chamber 7; the main pushing cylinders 8 correspond to the material cylinders 6 on the left and right; the left ends of the two material cylinders 6 are both fixedly connected to the feeding chamber 4, and two feeding chamber switching valve switch cylinders 9 are installed on the feeding chamber 4. The left end of the feeding chamber 4 is fixedly connected to the discharging chamber 3, and two discharging chamber switching valve switch cylinders 2 are installed on the discharging chamber 3. The left end of the discharging chamber 3 is fixedly connected to the discharging pipe 1; the discharging chamber 3 adopts a "human" pipe structure;

[0025] The discharge chamber 3 is provided with a discharge chamber opening, and the output ends of the two discharge chamber switching valve switch cylinders 2 are connected to the blocking piston 10, and the two discharge chamber switching valve switch cylinders 2 drive the blocking piston 10 to seal and open the discharge chamber opening; the feed chamber 4 is provided with a feed chamber opening, and the output ends of the two feed chamber switching valve switch cylinders 9 are also connected to the blocking piston 10, and the two feed chamber switching valve switch cylinders 9 drive the blocking piston 10 to seal and open the discharge chamber opening; the blocking piston 10 adopts a conical structure;

[0026] The blocking piston 10 includes a piston support 11, a piston pressure cover 12 and a piston retaining ring 13; the piston support 11 and the piston pressure cover 12 are fixedly connected by bolts, the piston pressure cover 12 is fixedly connected to the output end of the switching cylinder of the switching valve, and a sealing groove for sealing the discharge chamber opening or the feed chamber opening is provided on the piston support 11, and the discharge chamber opening or the feed chamber opening is embedded and connected in the sealing groove, and the sealing groove is adapted to the size of the discharge chamber opening or the feed chamber opening. A piston retaining ring 13 is provided between the piston support 11 and the piston pressure cover 12, and the outer side of the piston retaining ring 13 is folded downward. The piston retaining ring 13 is used for sealing between the piston support 11 and the piston pressure cover 12 and between the piston pressure cover 12 and the inner wall of the discharge chamber or the inner wall of the feed chamber.

[0027] like Figure 3-4 As shown in the figure, A1, A2, A3, and A4 are four switching valve switch cylinders, of which A1 and A2 are the switching valve switch cylinders 2 of the discharge chamber, and A3 and A4 are the switching valve switch cylinders 9 of the feed chamber; B1 and B2 are two main push cylinders 8. The flow direction of hydraulic oil is indicated by a single arrow, the flow direction of materials is indicated by a double arrow, and the action sequence is indicated by "①, ②". Figure 3 For position one, Figure 4 For position two.

[0028] like Figure 3 As shown, in position 1: Step 1: After receiving the action end signal from the proximity switch of hydraulic cylinder B, hydraulic cylinders A2 and A3 act synchronously, pushing the blocking piston to block the discharge chamber and feed chamber ports respectively (action time 2s), and the discharge chamber needs to maintain pressure after blocking. After hydraulic cylinders A2 and A3 are in place, the proximity switch of hydraulic cylinder A sends an action start signal. Step 2: After receiving the action signal from the proximity switch A, hydraulic cylinders B1 and B2 act synchronously in series, the B1 oil cylinder pushes the piston to feed out, and the B2 oil cylinder pulls the piston to suck the material into the material cylinder. At the same time, A1 and A4 act, pulling the blocking piston to open the discharge chamber and feed chamber ports respectively. After hydraulic cylinders B1 and B2 are in place, the proximity switch of hydraulic cylinder B sends an action signal.

[0029] like Figure 4As shown, in position 2: Step 1: After receiving the action signal from the proximity switch of hydraulic cylinder B, hydraulic cylinders A1 and A4 act synchronously, pushing the blocking piston to block the outlet and feed chamber openings respectively (action time 2s), and the discharge chamber needs to maintain pressure after blocking. After hydraulic cylinders A1 and A4 are in place, the proximity switch of hydraulic cylinder A sends an action start signal. Step 2: After receiving the action signal from the proximity switch of hydraulic cylinder A, hydraulic cylinders B1 and B2 act in series and synchronously in the opposite direction. The B1 oil cylinder pulls the piston to suck the material into the material cylinder, and the B2 oil cylinder pulls the piston to feed the material out. At the same time, A2 and A3 act, pulling the blocking piston to open the outlet and feed chamber openings respectively (action time 2s). After hydraulic cylinders B1 and B2 are in place, the proximity switch of hydraulic cylinder B sends an action end signal.

[0030] The working principle of the present invention is: the lifting valve pump uses the motor as the power source, adopts full hydraulic drive and PLC control, the hydraulic power part and the lifting valve pump are independent of each other, and the two are connected by a hydraulic hose; the paste pump hydraulic station is used as the power source of the pumping system to provide power for the feeding mechanism. Under the control of the PLC, the two material cylinders 6 are driven by the two main oil cylinders 8 to alternately suck and pump out the paste material, so that the paste material is continuously transported to the fully enclosed sludge discharge pipe 1, realizing the transportation of the paste material over a long distance and with a large head, and there is no reflux or leakage of the paste material. The main wear seal can be made of wear-resistant materials.

[0031] The lifting valve pump is reasonably designed, which can realize the long-distance and high-lift transportation of paste materials through pipelines, and has the following advantages: First, the structure is simple and reliable, with few moving parts, low failure rate and simple use; second, the dynamic blocking piston adopts a tapered piston structure, and the blocking piston and piston retaining ring are made of special materials, which are wear-resistant and have good sealing effect. It can build up a relatively high outlet pressure to meet the transportation requirements of ultra-long distance and ultra-high altitude; third, the discharge chamber adopts a streamlined design of "human" pipe structure, so that the paste material is streamlined, with good sealing performance, no mechanical obstruction to discharge, small material flow resistance, high volumetric efficiency, and can pump materials with larger solid particles.

[0032] In the description of the lift valve pump, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected" and "connected" 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 directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A lift valve pump, characterized in that: The invention comprises an actuator part; the actuator part comprises a discharge chamber (3), a feed chamber (4), a washing chamber (7), two main oil cylinders for pushing materials (8), two material cylinders (6), and four switching valve switch oil cylinders; the four switching valve switch oil cylinders are two switching valve switch oil cylinders (2) for the discharge chamber and two switching valve switch oil cylinders (9) for the feed chamber; two main oil cylinders for pushing materials (8) are installed at the right end of the base frame (5), the two main oil cylinders for pushing materials (8) are arranged up and down, and the left ends of the two main oil cylinders for pushing materials (8) are respectively fixedly connected to the washing chamber (7); two main oil cylinders for pushing materials (6) are installed at the left end of the base frame (5), the two material cylinders (6) are arranged up and down, and the right ends of the two material cylinders (6) are respectively fixedly connected to the washing chamber (7); The feeding chamber (7) is provided with a main material pushing cylinder (8) and a material cylinder (6) corresponding to each other on the left and right sides; the left ends of the two material cylinders (6) are fixedly connected to the feeding chamber (4), two feeding chamber switching valve switch cylinders (9) are installed on the feeding chamber (4), the left end of the feeding chamber (4) is fixedly connected to the discharging chamber (3), two discharging chamber switching valve switch cylinders (2) are installed on the discharging chamber (3), and the left end of the discharging chamber (3) is fixedly connected to the discharging pipe (1); the discharging chamber (3) is provided with a discharging chamber opening, and the output ends of the two discharging chamber switching valve switch cylinders (2) are connected to the blocking piston (10); the feeding chamber (4) is provided with a feeding chamber opening, and the output ends of the two feeding chamber switching valve switch cylinders (9) are also connected to the blocking piston (10).

2. The lift valve pump according to claim 1, characterized in that: It also includes hydraulic power part and electrical control part.

3. The lift valve pump according to claim 1, characterized in that: The blocking piston (10) comprises a piston support (11), a piston pressure cover (12) and a piston retaining ring (13); the piston support (11) is fixedly connected to the piston pressure cover (12), the piston pressure cover (12) is fixedly connected to the output end of the switching cylinder of the switching valve, the piston support (11) is provided with a sealing groove for sealing the discharge chamber opening or the feed chamber opening, and a piston retaining ring (13) is provided between the piston support (11) and the piston pressure cover (12).

4. The lift valve pump according to claim 3, characterized in that: The outer side of the piston retaining ring (13) is folded downward.

5. The lift valve pump according to claim 1, characterized in that: The discharge chamber (3) adopts a herringbone tube structure.

6. The lift valve pump according to claim 1, characterized in that: The blocking piston (10) adopts a conical structure.

7. The lift valve pump according to claim 1, characterized in that: The base frame (5) comprises a left bracket vertically disposed at the left end, a base in the middle, and a right bracket vertically disposed at the right end, wherein the lower ends of the left bracket and the right bracket are fixedly connected to the base; two transversely disposed main oil cylinders (8) for pushing materials are installed on the right bracket, and two transversely disposed material cylinders (6) are installed on the left bracket.

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