Pump head of plunger pump and plunger pump

Abstract

The utility model relates to the technical field of feed liquid conveying, in particular to a plunger pump head and a plunger pump, the plunger pump head comprises a pump head body, the pump head body is made of stainless steel, the pump head body is provided with a water inlet cavity, a water outlet cavity and a plurality of plunger cavities, and the water inlet cavity and the water outlet cavity are communicated with the plunger cavities. The stainless steel material has the characteristics of high strength, corrosion resistance and high temperature resistance, the pump head body is made of the stainless steel material, the structural strength of the pump head body can be improved, the service life of the pump head body is further prolonged, the plunger cavities are formed, the water inlet cavity and the water outlet cavity are communicated with the plunger cavities, simultaneous work of the plungers is facilitated, and the service life of the pump head body is prolonged. And the working efficiency of the plunger pump is improved.

Description

Technical Field

[0001] This application relates to the technical field of liquid delivery, and particularly relates to a plunger pump head and a plunger pump. Background Art

[0002] A plunger pump is an important device in a hydraulic system. It relies on the reciprocating motion of a plunger in a cylinder block to change the volume of the sealed working chamber, thereby achieving oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, and convenient flow regulation, and is widely used in occasions that require high pressure, large flow, and flow regulation, such as hydraulic presses, construction machinery, and ships.

[0003] The plunger pump mainly drives the plunger to reciprocate by the rotation of a crankshaft, realizes the change of the sealed volume in the pump head, and realizes the suction and discharge of liquid. The pump head is the main pressure-bearing component. The pump head is affected by alternating pressure for a long time, and there is a situation where the pump head is damaged due to insufficient structural strength of the pump head. Due to the short service life, the maintenance cost is high, and there is also downtime. Utility Model Content

[0004] In order to enhance the structural strength of the pump head and improve the service life of the plunger pump, this application provides a plunger pump head and a plunger pump.

[0005] In the first aspect, this application provides a plunger pump head, adopting the following technical solution:

[0006] A plunger pump head includes a pump head body. The pump head body is made of stainless steel. The pump head body is provided with a water inlet chamber, a water outlet chamber, and a plurality of plunger chambers. The water inlet chamber and the water outlet chamber are communicated with the plunger chambers.

[0007] By adopting the above technical solution, stainless steel has the characteristics of high strength, corrosion resistance, and high temperature resistance. The pump head body is made of stainless steel, which helps to improve the structural strength of the pump head body, and thus improves the service life of the pump head body. A plurality of plunger chambers are provided, and the water inlet chamber and the water outlet chamber are communicated with a plurality of plunger chambers, which is convenient for a plurality of plungers to work simultaneously and improves the working efficiency of the plunger pump.

[0008] Preferably, the pump head body includes a cylinder block, a drainage body, and a water inlet body. The plunger chambers are located in the cylinder block, the water inlet chamber is located in the water inlet body, the water outlet chamber is located in the drainage body, the water inlet body is connected to one side of the cylinder block along the axis direction of the plunger chamber, and the drainage body is connected to one side of the cylinder block along the vertical direction.

[0009] By adopting the above technical solution, the pump head body is composed of a cylinder block, a water inlet body, and a drainage body, which is convenient for repairing and replacing the cylinder block, the water inlet body, and the drainage body respectively, improves the service life of the pump head body, and reduces the production cost.

[0010] Preferably, a gusset plate is connected to the outer wall of the cylinder block. The gusset plate is provided with a first fixing hole, and the water inlet body is provided with a first connection hole for a bolt to pass through and be threadedly connected to the first fixing hole. On the side of the drain body close to the cylinder block, a second fixing hole is provided, and the axis of the second fixing hole is vertical. The cylinder block is provided with a second connection hole that penetrates the cylinder block along the axis direction of the second fixing hole for a bolt to pass through and be threadedly connected to the second fixing hole.

[0011] By adopting the above technical solution, the drain body and the water inlet body are fixedly connected to the cylinder block through bolts, improving the connection stability between the drain body and the water inlet body and the cylinder block. When maintenance is required, loosen the bolts to relatively separate the drain body and the water inlet body from the cylinder block, improving work efficiency.

[0012] Preferably, a reinforcing rib is further included, which extends from the gusset plate to the outer wall of the cylinder block.

[0013] By adopting the above technical solution, the reinforcing rib extends from the gusset plate to the outer wall of the cylinder block, improving the structural strength between the gusset plate and the cylinder block, reducing the possibility of fracture at the connection between the gusset plate and the cylinder block due to stress concentration, and increasing the service life of the cylinder block.

[0014] Preferably, several first convex rings are connected to the side of the water inlet body close to the cylinder block. The several first convex rings are spaced apart along the length direction of the water inlet body. A first positioning ring is connected to the side of the cylinder block close to the water inlet body. The number of the first positioning rings is the same as that of the first convex rings and they correspond one by one. The first positioning ring is coaxially embedded in the first convex ring, and the outer wall of the first positioning ring fits with the inner wall of the first convex ring.

[0015] By adopting the above technical solution, the first positioning ring and the first convex ring cooperate to initially position the installation of the water inlet body and the cylinder block, making the first connection hole directly opposite to the first fixing hole, facilitating the bolt to pass through the first connection hole and be threadedly connected to the first fixing hole to realize the fixed connection between the water inlet body and the cylinder block.

[0016] Preferably, a first fillet is provided at the inner wall of the first convex ring near the end close to the cylinder block for the outer wall of the first positioning ring near the end close to the water inlet body to abut against.

[0017] By adopting the above technical solution, the first fillet is for the outer wall of the first positioning ring to abut against, guiding the first positioning ring and facilitating the first positioning ring to be embedded in the first convex ring, improving the installation efficiency of the pump head body.

[0018] Preferably, a plurality of second convex rings are connected to one side of the drain body close to the cylinder block. The plurality of second convex rings are distributed at intervals along the length direction of the drain body. A second positioning ring is connected to the outer wall of the cylinder block close to the drain body. The number of the second positioning rings is the same as that of the second convex rings and they correspond one by one. The second convex rings are coaxially embedded in the second positioning rings, and the outer wall of the second convex ring is in contact with the inner wall of the second positioning ring.

[0019] By adopting the above technical solution, the second positioning ring and the second convex ring cooperate to play a preliminary positioning role in the installation of the drain body and the cylinder block, so that the second connection hole is aligned with the second fixing hole, which is convenient for the bolt to pass through the second connection hole and then be threadedly connected to the second fixing hole, realizing the fixed connection between the drain body and the cylinder block.

[0020] In a second aspect, the present application provides a plunger pump, adopting the following technical solution:

[0021] A plunger pump includes the plunger pump head as described in the first aspect.

[0022] By adopting the above technical solution, the plunger pump adopts a plunger pump head with relatively high structural strength, which improves the service life of the plunger pump head, and further improves the service life of the plunger pump.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The stainless steel material has the characteristics of high strength, corrosion resistance and high temperature resistance. The pump head body is made of stainless steel material, which helps to improve the structural strength of the pump head body, and further improves the service life of the pump head body. Multiple plunger cavities are provided, and the water inlet cavity and the water outlet cavity are both connected to the multiple plunger cavities, which is convenient for multiple plungers to work simultaneously and improves the working efficiency of the plunger pump;

[0025] 2. The pump head body is composed of a cylinder block, a water inlet body and a drain body, which is convenient for repairing and replacing the cylinder block, the water inlet body and the drain body respectively, improves the service life of the pump head body, and reduces the production cost;

[0026] 3. The first positioning ring and the first convex ring cooperate to play a preliminary positioning role in the installation of the water inlet body and the cylinder block, so that the first connection hole is aligned with the first fixing hole, which is convenient for the bolt to pass through the first connection hole and then be threadedly connected to the first fixing hole, realizing the fixed connection between the water inlet body and the cylinder block; the second positioning ring and the second convex ring cooperate to play a preliminary positioning role in the installation of the drain body and the cylinder block, so that the second connection hole is aligned with the second fixing hole, which is convenient for the bolt to pass through the second connection hole and then be threadedly connected to the second fixing hole, realizing the fixed connection between the drain body and the cylinder block. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the plunger pump head.

[0028] Figure 2 It is a cross-sectional view of the pump head of a plunger pump.

[0029] Figure 3 It is a schematic structural diagram of the pump head of the plunger pump from another perspective.

[0030] Figure 4 It is Figure 2 an enlarged view of part A in

[0031] Figure 5 a cross-sectional view of the pump head of the plunger pump.

[0032] Figure 6 It is a schematic structural diagram of the plunger pump.

[0033] Description of reference numerals:

[0034] 1. Pump head body; 11. Cylinder block; 111. Plunger cavity; 112. Ear plate; 1121. First fixing hole; 113. Fixed column; 1131. Second connection hole; 114. Reinforcing rib; 115. First positioning ring; 116. Second positioning ring; 117. Connecting plate; 1171. Mounting hole; 118. First internal thread section; 119. Connecting seat; 1191. Embedded groove; 1192. Second internal thread section; 1110. First through hole; 1111. Water inlet channel; 1112. Water outlet channel; 12. Water inlet body; 121. Water inlet cavity; 122. First connection hole; 123. First convex ring; 1231. First fillet; 124. Second through hole; 125. Water inlet pipe; 1251. First external thread section; 126. Water inlet; 13. Drainage body; 131. Water outlet cavity; 132. Second fixing hole; 133. Second convex ring; 134. Third through hole; 135. Water outlet; 136. Third internal thread section;

[0035] 2. Box body; 21. Mounting seat; 211. Third fixing hole;

[0036] 3. Plunger;

[0037] 4. Gas cylinder;

[0038] 5. Pressure regulating valve;

[0039] 6. Pressure gauge;

[0040] 7. Water outlet switch. Detailed implementation manners

[0041] The following further describes the present application in detail with reference to the accompanying drawings.

[0042] Refer to Figure 1, an embodiment of the present application discloses a plunger pump pump head including a pump head body 1. In this embodiment, the pump head body 1 is made of stainless steel. The pump head body 1 includes a cylinder block 11. An outer wall of one end of the cylinder block 11 in the width direction of the cylinder block 11 is fixedly connected with a connecting plate 117. One side surface of the connecting plate 117 in the width direction of the cylinder block 11 is flush with an end surface of the cylinder block 11 close to the connecting plate 117. There are two connecting plates 117, and the two connecting plates 117 are symmetrically distributed in the length direction of the cylinder block 11. The connecting plate 117 is provided with mounting holes 1171. One connecting plate 117 is provided with two mounting holes 1171, and the two mounting holes 1171 are spaced apart vertically. The mounting holes 1171 are used for bolts to pass through and be threadedly connected with the plunger pump body. One end of the cylinder block 11 close to the connecting plate 117 is provided with a plunger cavity 111. An axial direction of the plunger cavity 111 is parallel to the width direction of the cylinder block 11. There are several plunger cavities 111, and the several plunger cavities 111 are spaced apart in a direction perpendicular to the axial direction of the plunger cavity 111, and adjacent two plunger cavities 111 are not communicated. In this embodiment, there are three plunger cavities 111, and the three plunger cavities 111 are evenly distributed in a direction perpendicular to the axial direction of the plunger cavity 111.

[0043] Refer to Figure 1 and Figure 2 , a first internal thread section 118 is provided at a cavity wall of one end of the plunger cavity 111 close to the connecting plate 117. A connecting seat 119 is fixedly connected to an outer wall of the cylinder block 11. The connecting seat 119 is located above the cylinder block 11, and an axis of the connecting seat 119 is vertical. The number of connecting seats 119 is the same as the number of plunger cavities 111 and they correspond one by one. An insertion groove 1191 is coaxially provided at one end of the connecting seat 119 away from the cylinder block 11. A second internal thread section 1192 is provided at a groove wall of the insertion groove 1191. A first through hole 1110 is coaxially provided at a bottom of the insertion groove 1191. The first through hole 1110 is communicated with the plunger cavity 111, and the first through hole 1110 is located on a side of the first internal thread section 118 away from the connecting plate 117.

[0044] Refer to Figure 1 and Figure 3, the pump head body 1 further includes a water inlet body 12, and the water inlet body 12 is fixedly connected to one end of the cylinder block 11 away from the connecting plate 117. There are two ear plates 112 fixedly connected to the outer wall of the cylinder block 11, and the two ear plates 112 are symmetrically distributed along the length direction of the cylinder block 11. A reinforcing rib 114 is fixedly connected to the side of the ear plate 112 away from the water inlet body 12. The number of the reinforcing ribs 114 is the same as and corresponds one-to-one with the number of the ear plates 112, and the reinforcing rib 114 extends from the ear plate 112 to the outer wall of the cylinder block 11. The ear plate 112 is provided with a first fixing hole 1121, and the first fixing hole 1121 penetrates through the ear plate 112 along the width direction of the cylinder block 11. The water inlet body 12 is provided with a first connection hole 122. The number of the first connection holes 122 is the same as and corresponds one-to-one with the number of the first fixing holes 1121. The first connection hole 122 is used for a bolt to pass through and be threadedly connected into the first fixing hole 1121.

[0045] Referring to Figure 2 and Figure 4 , on the side of the plunger chamber 111 close to the water inlet body 12, a water inlet passage 1111 is coaxially provided, and the water inlet passage 1111 is communicated with the outside. A first positioning ring 115 is fixedly connected to the side of the cylinder block 11 close to the water inlet body 12. The first positioning ring 115 is arranged around the water inlet passage 1111. The number of the first positioning rings 115 is the same as and corresponds one-to-one with the number of the water inlet passages 1111, and the axis of the first positioning ring 115 coincides with the axis of the water inlet passage 1111. A first convex ring 123 is fixedly connected to the side of the water inlet body 12 close to the cylinder block 11. The number of the first convex rings 123 is the same as and corresponds one-to-one with the number of the first positioning rings 115. The first positioning ring 115 is coaxially embedded in the first convex ring 123, and the outer wall of the first positioning ring 115 is in contact with the inner wall of the first convex ring 123. One end of the first convex ring 123 close to the cylinder block 11 abuts against one end of the cylinder block 11 away from the connecting plate 117. A first rounded corner 1231 is provided on the inner wall of one end of the first convex ring 123 close to the cylinder block 11, and the first rounded corner 1231 is used for the end of the outer wall of the first positioning member close to the water inlet body 12 to abut against.

[0046] Referring to Figure 3 and Figure 4 , the water inlet body 12 is provided with a water inlet chamber 121. A second through hole 124 is provided on the chamber wall of the water inlet chamber 121 on the side close to the cylinder block 11. The axis of the second through hole 124 coincides with the axis of the first convex ring 123. The number of the second through holes 124 is the same as and corresponds one-to-one with the number of the first convex rings 123. A water inlet pipe 125 is fixedly connected to the side of the water inlet body 12 away from the cylinder block 11. The axis of the water inlet pipe 125 is parallel to the axis of the second through hole 124. A first external thread section 1251 is provided on the outer periphery of the water inlet pipe 125. A water inlet 126 is provided on the chamber wall of the water inlet chamber 121 on the side away from the cylinder block 11. The water inlet 126 is communicated with the water inlet pipe 125, and the axis of the water inlet 126 coincides with the axis of the water inlet pipe 125.

[0047] Referring to Figure 2And Figure 4 The pump head body 1 further includes a drain body 13, and the drain body 13 is fixedly connected to the upper end of the cylinder block 11. An outlet passage 1112 is provided at the chamber wall on the side of the plunger chamber 111 close to the drain body 13, and the outlet passage 1112 communicates with the outside. A second positioning ring 116 is fixedly connected to the outer wall on the side of the cylinder block 11 close to the drain body 13. The second positioning ring 116 is arranged around the outlet passage 1112. The number of the second positioning rings 116 is the same as that of the outlet passages 1112 and they correspond one by one. The axis of the second positioning ring 116 coincides with the axis of the outlet passage 1112. A second convex ring 133 is fixedly connected to the side of the drain body 13 close to the cylinder block 11. The number of the second convex rings 133 is the same as that of the second positioning rings 116 and they correspond one by one. The second convex ring 133 is coaxially embedded in the second positioning ring 116. The outer wall of the second convex ring 133 is in contact with the inner wall of the second positioning ring 116. One end of the second positioning ring 116 away from the cylinder block 11 abuts against the side of the drain body 13 close to the cylinder block 11.

[0048] Refer to Figure 3 And Figure 4 The drain body 13 is provided with a water outlet chamber 131. A third through hole 134 is provided at the chamber wall on the side of the water outlet chamber 131 close to the cylinder block 11. The axis of the third through hole 134 coincides with the axis of the second convex ring 133. The number of the third through holes 134 is the same as that of the second convex rings 133 and they correspond one by one. A water outlet 135 is provided at the chamber wall on the side of the water outlet chamber 131 close to the water inlet body 12. There are three water outlets 135, and the three water outlets 135 are evenly distributed along the length direction of the drain body 13. A third internal thread section 136 is provided at the inner wall of the water outlet 135.

[0049] Refer to Figure 5 The cylinder block 11 is fixedly connected with fixing columns 113. The axial direction of the fixing columns 113 is vertical. There are several fixing columns 113, and the several fixing columns 113 are spaced apart along the length direction of the cylinder block 11. In this embodiment, there are two fixing columns 113, and one fixing column 113 is provided between two adjacent plunger chambers 111. The fixing column 113 is coaxially provided with a second connection hole 1131, and the second connection hole 1131 penetrates through the fixing column 113 along the axial direction of the fixing column 113.

[0050] The side of the drain body 13 close to the cylinder block 11 is provided with second fixing holes 132. The number of the second fixing holes 132 is the same as that of the second connection holes 1131 and they correspond one by one. The second connection holes 1131 are used for bolts to pass through and then be threadedly connected to the second fixing holes 132.

[0051] The implementation principle of the plunger pump head in the embodiment of the present application is as follows: The connecting plate 117 is fitted to the plunger pump body, and the bolts pass through the mounting holes 1171 and are threadedly connected to the plunger pump body, so as to relatively fix the cylinder block 11 and the plunger pump body.

[0052] The first fillet 1231 is abutted against the outer wall of the first positioning ring 115, so that the first positioning piece is embedded in the first convex ring 123, to achieve preliminary fixation of the water inlet body 12 and the cylinder body 11, so that the first connecting hole 122 is opposite to the first fixing hole 1121, and the bolt is passed through the first connecting hole 122 and then threaded into the first fixing hole 1121, to achieve relative fixation of the water inlet body 12 and the cylinder body 11.

[0053] The second positioning ring 116 is embedded in the second convex ring 133 to achieve preliminary fixation of the drain body 13 and the cylinder body 11, so that the second connecting hole 1131 and the second fixing hole 132 are opposite to each other, and the bolt is passed through the second connecting hole 1131 from the bottom of the cylinder body 11 and then threaded into the second fixing hole 132 to achieve relative fixation of the drain body 13 and the cylinder body 11.

[0054] The pump head body 1 is made of stainless steel, which helps to improve the structural strength of the pump head body 1 and further increase the service life of the pump head body 1 .

[0055] Reference Figure 6 The embodiment of the present application further discloses a plunger pump including a housing 2. The housing 2 is fixedly connected to a side of the cylinder 11 away from the water inlet 12, and a mounting seat 21 is fixedly connected to a side of the housing 2 close to the cylinder 11. The number of mounting seats 21 is the same as the number of connecting plates 117 and corresponds one to one. The surface of the side of the connecting plate 117 away from the water inlet 12 is in contact with the surface of the side of the mounting seat 21 close to the cylinder 11. The mounting seat 21 is provided with a third fixing hole 211. The number of the third fixing hole 211 is the same as the number of the mounting hole 1171 and corresponds one to one. The bolt passes through the mounting hole 1171 and is threadedly connected to the third fixing hole 211.

[0056] A plunger pump further includes a plunger 3. The number of the plungers 3 is the same as the number of the plunger cavities 111 and corresponds one to one. One end of the plunger 3 away from the box body 2 is coaxially slidably embedded in the plunger cavity 111.

[0057] A plunger pump further includes a gas cylinder 4 , a pressure regulating valve 5 and a pressure gauge 6 , wherein the gas cylinder 4 , the pressure regulating valve 5 and the pressure gauge 6 are all fixedly connected to a side of the drainage body 13 away from the cylinder body 11 .

[0058] A plunger pump further includes a water outlet switch 7. The number of the water outlet switches 7 is the same as the number of the water outlets 135 and corresponds one to one. One end of the water outlet switch 7 is coaxially threadedly connected to the water outlet 135, and the water outlet switch 7 is connected to the water outlet 135.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A plunger pump head, characterized in that: The pump head body (1) comprises a pump head body (1); the pump head body (1) is made of stainless steel; the pump head body (1) is provided with a water inlet chamber (121), a water outlet chamber (131) and a plunger chamber (111); a plurality of plunger chambers (111) are provided; the water inlet chamber (121) and the water outlet chamber (131) are in communication with the plunger chamber (111); The pump head body (1) comprises a cylinder body (11), a water discharge body (13) and a water inlet body (12); The outer wall of the cylinder body (11) is connected to an ear plate (112); the ear plate (112) is provided with a first fixing hole (1121); the water inlet body (12) is provided with a first connecting hole (122); the first connecting hole (122) is used for a bolt to pass through and then be threadedly connected to the first fixing hole (1121); a second fixing hole (132) is provided on a side of the drainage body (13) close to the cylinder body (11); the axis of the second fixing hole (132) is vertical; the cylinder body (11) is provided with a second connecting hole (1131); the second connecting hole (1131) passes through the cylinder body (11) along the axis direction of the second fixing hole (132); the second connecting hole (1131) is used for a bolt to pass through and then be threadedly connected to the second fixing hole (132); It also includes a reinforcing rib (114); the reinforcing rib (114) extends from the ear plate (112) to the outer wall of the cylinder body (11).

2. The plunger pump head according to claim 1, characterized in that: The plunger cavity (111) is located in the cylinder body (11); the water inlet cavity (121) is located in the water inlet body (12); the water outlet cavity (131) is located in the water discharge body (13); the water inlet body (12) is connected to one side of the cylinder body (11) along the axial direction of the plunger cavity (111); and the water discharge body (13) is connected to one side of the cylinder body (11) along the vertical direction.

3. The plunger pump head according to claim 1, characterized in that: A plurality of first convex rings (123) are connected to a side of the water inlet body (12) close to the cylinder body (11); the plurality of first convex rings (123) are spaced apart along the length direction of the water inlet body (12); a first positioning ring (115) is connected to a side of the cylinder body (11) close to the water inlet body (12); the number of the first positioning rings (115) is the same as the number of the first convex rings (123) and they correspond one to one; the first positioning ring (115) is coaxially embedded in the first convex ring (123); and the outer wall of the first positioning ring (115) is in contact with the inner wall of the first convex ring (123).

4. The plunger pump head according to claim 3, characterized in that: A first rounded corner (1231) is provided on the inner wall of the first convex ring (123) close to one end of the cylinder body (11); the first rounded corner (1231) is used for abutting against one end of the outer wall of the first positioning ring (115) close to the water inlet (12).

5. The plunger pump head according to claim 1, characterized in that: A plurality of second convex rings (133) are connected to one side of the drainage body (13) close to the cylinder body (11); the plurality of second convex rings (133) are spaced apart along the length direction of the drainage body (13); a second positioning ring (116) is connected to the outer wall of the cylinder body (11) close to the drainage body (13); the number of the second positioning rings (116) is the same as the number of the second convex rings (133) and they correspond one to one; the second convex ring (133) is coaxially embedded in the second positioning ring (116); and the outer wall of the second convex ring (133) is in contact with the inner wall of the second positioning ring (116).

6. A plunger pump, characterized in that: It comprises a plunger pump head as described in any one of claims 1 to 5.

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