Pump head body and pump head body processing method

Abstract

The present invention relates to the field of pump technology, and in particular to a pump head body and a method for processing the pump head body. The pump head body of the present invention includes at least two spherical shell units, all of which are connected in sequence, and the spherical shell unit includes a first hemispherical shell and a second hemispherical shell. The first hemispherical shell and the second hemispherical shell are connected to form a spherical shell unit, and all the first hemispherical shells and the second hemispherical shells are in an alternatingly connected structure. The spherical shell unit is formed by connecting the first hemispherical shell and the second hemispherical shell to each other, and then the pump head body is formed by connecting at least two spherical shell units in sequence, thereby avoiding the pump head body from being forged. Compared with forging, the internal tensile stress of the pump head body is smaller, quality inspection is relatively convenient, and product quality is more guaranteed. In addition, the alternatingly connected first hemispherical shell and second hemispherical shell can avoid the intersection or overlap between the connection position of the first hemispherical shell and the second hemispherical shell of the same spherical shell unit and the connection position of the adjacent spherical shell unit.

Description

Technical Field

[0001] The present invention relates to the technical field of pumps, and in particular to a pump head body and a method for processing the pump head body. Background Art

[0002] As a pressure-bearing component, the pump head must withstand alternating ultra-high pressure loads during operation. Existing pump heads are typically processed using one-piece forging, but this process requires heating to a temperature above the plasticity point. This high temperature leads to uneven heat dissipation, inevitably leading to defects such as internal tensile stress, poor core forging performance, and difficulty in internal quality inspection, resulting in unstable product quality. Summary of the Invention

[0003] The problem solved by the present invention is that the pump head body is forged and formed, resulting in unstable product quality.

[0004] To solve the above problems, the present invention provides a pump head body, comprising at least two spherical shell units, all of which are connected in sequence, and the spherical shell unit comprises a first hemispherical shell and a second hemispherical shell, the first hemispherical shell and the second hemispherical shell are connected to form the spherical shell unit, and all of the first hemispherical shells and the second hemispherical shells are in an alternatingly connected structure.

[0005] Optionally, a first connecting platform is provided on the outer wall of the first hemispherical shell, and a second connecting platform is provided on the outer wall of the second hemispherical shell, and the first connecting platform is connected to the second connecting platform of the adjacent spherical shell unit.

[0006] Optionally, a first arc-shaped through groove is provided on the first hemispherical shell, and a second arc-shaped through groove is provided on the second hemispherical shell. The edges of the first arc-shaped through groove and the second arc-shaped through groove of the same spherical shell unit are connected to form a first through hole, and the first through hole penetrates the spherical shell unit along a first radial direction.

[0007] Optionally, a third arc-shaped through groove is provided on the first hemispherical shell, and a fourth arc-shaped through groove is provided on the second hemispherical shell. The edges of the third arc-shaped through groove and the fourth arc-shaped through groove of the same spherical shell unit are connected to form a second through hole. The second through hole passes through the spherical shell unit along the second radial direction, and the first through hole and the second through hole intersect.

[0008] Optionally, four connecting pipes are further included, and the four connecting pipes are respectively connected to the spherical shell unit, and the four connecting pipes are respectively located at the opposite ends of the first through hole and the second through hole for connection.

[0009] Optionally, the first hemispherical shell and the second hemispherical shell are connected by friction welding; and the connecting pipe and the spherical shell unit are connected by friction welding.

[0010] Compared with the prior art, the pump head body of the present invention has the following beneficial effects:

[0011] The present invention interconnects the first and second hemispherical shells to form a spherical shell unit, and then sequentially connects at least two spherical shell units to form the pump head body, eliminating the need for forging. Compared to forging, the pump head body exhibits lower internal tensile stress, facilitates quality inspection, and ensures higher product quality. Furthermore, the alternating connection of the first and second hemispherical shells prevents the connection points of the first and second hemispherical shells of a given spherical shell unit from intersecting or overlapping with those of adjacent spherical shell units.

[0012] The present invention also provides a method for processing a pump head body, comprising:

[0013] connecting the first hemispherical shell and the second hemispherical shell by friction welding to form a spherical shell unit;

[0014] connecting different spherical shell units by friction welding so that all the first hemispherical shells and the second hemispherical shells are in an alternatingly connected structure;

[0015] respectively forming a first through hole and a second through hole on different spherical shell units, so that the first through hole and the second through hole intersect;

[0016] Connecting pipes are respectively connected at both ends of the first through hole and the second through hole by friction welding.

[0017] Optionally, connecting the first hemispherical shell and the second hemispherical shell by friction welding to form a spherical shell unit includes:

[0018] aligning the first surfaces to be connected of the first hemispherical shell and the second hemispherical shell;

[0019] Applying pressure to the first hemispherical shell and the second hemispherical shell to fit the first hemispherical shell and the second hemispherical shell;

[0020] The first hemispherical shell and / or the second hemispherical shell are controlled to rotate so that the first surfaces to be connected of the first hemispherical shell and the second hemispherical shell are melted to form the spherical shell unit.

[0021] Optionally, the connecting the different spherical shell units by friction welding comprises:

[0022] aligning the second surfaces to be connected of two adjacent spherical shell units;

[0023] Applying pressure to two adjacent spherical shell units respectively to make the two adjacent spherical shell units fit together;

[0024] The two spherical shell units are controlled to rotate relative to each other so that the second surfaces to be connected of the two spherical shell units are melted and then connected.

[0025] Optionally, the connecting pipes at both ends of the first through hole and the second through hole are connected by friction welding respectively, comprising:

[0026] Positioning all the spherical shell units, aligning one of the connecting pipes with the third surface to be connected of the spherical shell unit, wherein the third surface to be connected corresponds to the position of the first through hole;

[0027] Applying pressure to the connecting tube so that the connecting tube fits into one end of the first through hole;

[0028] The connecting tube is controlled to rotate so that the connecting tube and the third surface to be connected of the spherical shell unit are melted and then connected.

[0029] Compared with the prior art, the processing method of the pump head body of the present invention has the following beneficial effects:

[0030] The present invention first connects the first hemispherical shell and the second hemispherical shell by friction welding to form a spherical shell unit, then sequentially connects the different spherical shell units. After the spherical shell units are connected, the first through hole and the second through hole are opened. As a result, the first arcuate through groove and the third arcuate through groove are respectively located on the first hemispherical shell, and the second arcuate through groove and the fourth arcuate through groove are located on the second hemispherical shell. This avoids the trouble of aligning the first arcuate through groove and the second arcuate through groove caused by pre-grooving the first and second hemispherical shells. It also ensures the parallelism of the first through holes and the second through holes on all the spherical shell units. In addition, opening the first through hole and the second through hole after the spherical shell units are connected can relieve some of the stress after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a top view of a pump head body in an embodiment of the present invention;

[0032] Figure 2 is a cross-sectional view of a pump head body in an embodiment of the present invention;

[0033] Figure 3 is a side view of a pump head body in an embodiment of the present invention;

[0034] Figure 4 is a cross-sectional view of the connection between the connecting pipe and the spherical shell unit in an embodiment of the present invention;

[0035] Figure 5 Schematic diagram of the process of the pump head body in an embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 1-spherical shell unit, 2-first through hole, 3-second through hole, 4-connecting pipe, 5-discharge pipe, 6-valve body mounting pipe, 7-suction pipe, 8-plunger positioning pipe, 11-first hemispherical shell, 12-second hemispherical shell, 111-first connecting platform, 121-second connecting platform, 21-first arcuate through groove, 22-second arcuate through groove, 31-third arcuate through groove, 32-fourth arcuate through groove, 41-tube body, 42-connecting section. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] Throughout this specification, references to the terms "embodiment," "one embodiment," and "an implementation" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

[0041] An embodiment of the present invention provides a pump head body, such as Figure 1 and Figure 2 As shown, it includes at least two spherical shell units 1, all of which are connected in sequence. The spherical shell unit 1 includes a first hemispherical shell 11 and a second hemispherical shell 12. The first hemispherical shell 11 and the second hemispherical shell 12 are connected to form the spherical shell unit 1, and all of the first hemispherical shells 11 and the second hemispherical shells 12 are in an alternatingly connected structure.

[0042] Here, the first hemispherical shell 11 and the second hemispherical shell 12 can be connected by welding or bonding, and the first hemispherical shell 11 and the second hemispherical shell 12 can also be connected by snapping and bonding. Here, one or two spherical shell units 1 are used as an example for explanation, and the two spherical shell units 1 are respectively the first spherical shell unit and the second spherical shell 12 of the first spherical shell unit and the first hemispherical shell 11 of the second spherical shell unit are connected, so that the first hemispherical shell 11, the second hemispherical shell 12 of the first spherical shell unit and the first hemispherical shell 11, the second hemispherical shell 12 of the second spherical shell unit are connected in sequence. The recessed parts of the first hemispherical shell 11 and the second hemispherical shell 12 of the same spherical shell unit 1 are arranged facing each other to enclose and form the spherical shell unit 1, and the outer walls of different spherical shell units 1 are connected. Preferably, there can be two, three, four or five spherical shell units 1, and all the spherical shell units 1 can be arranged side by side.

[0043] Thus, the first hemispherical shell 11 and the second hemispherical shell 12 are connected to form a spherical shell unit 1, and then at least two spherical shell units 1 are sequentially connected to form the pump head body, eliminating the need for forging. Compared to forging, the pump head body has lower internal tensile stress, is relatively easy to inspect, and provides better product quality assurance. Furthermore, the alternating connection of the first and second hemispherical shells 11, 12 prevents the connection points of the first and second hemispherical shells of one spherical shell unit from intersecting or overlapping with those of adjacent spherical shell units.

[0044] Alternatively, as Figure 1 and Figure 2 As shown, a first connecting platform 111 is formed on the outer wall of the first hemispherical shell 11, and a second connecting platform 121 is formed on the outer wall of the second hemispherical shell 12. Here, the first connecting platform 111 and the second connecting platform 121 are of matching size, and the first connecting platform 111 is connected to the second connecting platform 121 of the adjacent spherical shell unit 1, for example, by welding or adhesive bonding. The provision of the first connecting platform 111 and the second connecting platform 121 can increase the area of ​​the connecting surface of adjacent spherical shell units 1, thereby making the connection between adjacent spherical shell units 1 more stable. When the first connecting platform 111 and the second connecting platform 121 are connected by friction welding, it can facilitate the positioning of the first hemispherical shell 11 and the second hemispherical shell 12 of the same spherical shell unit 1 when connected.

[0045] Alternatively, as Figure 2 As shown, a first arc-shaped through groove 21 is provided on the first hemispherical shell 11, and a second arc-shaped through groove 22 is provided on the second hemispherical shell 12. The edges of the first arc-shaped through groove 21 and the second arc-shaped through groove 22 of the same spherical shell unit 1 are connected to form a first through hole 2, and the first through hole 2 passes through the spherical shell unit 1 along a first radial direction.

[0046] In one embodiment, the first through hole 2 can be formed after the first hemispherical shell 11 and the second hemispherical shell 12 are connected, so that the first arcuate through groove 21 is located on the first hemispherical shell 11 and the second arcuate through groove 22 is located on the second hemispherical shell 12. In one embodiment, the first arcuate through groove 21 can be first formed in the first hemispherical shell 11 and the second arcuate through groove 22 can be first formed in the second hemispherical shell 12, and then the first hemispherical shell 11 and the second hemispherical shell 12 are bonded together so that the first arcuate through groove 21 and the second arcuate through groove 22 together form the first through hole 2. The first through hole 2 is suitable for installing the connecting pipe 4.

[0047] By opening the first through hole 2 at the connection between the first hemispherical shell 11 and the second hemispherical shell 12 , when the connecting pipe 4 is connected at the first through hole 2 , the connection structure between the first hemispherical shell 11 and the second hemispherical shell 12 can be strengthened.

[0048] Alternatively, as Figure 2 As shown, the first hemispherical shell 11 is provided with a third arcuate through-slot 31, and the second hemispherical shell 12 is provided with a fourth arcuate through-slot 32. The edges of the third arcuate through-slot 31 and the fourth arcuate through-slot 32 of the same spherical shell unit 1 are connected to form a second through-hole 3. The second through-hole 3 penetrates the spherical shell unit 1 along a second radial direction, and the first through-hole 2 and the second through-hole 3 intersect. The first radial direction and the second radial direction indicate different directions.

[0049] For the same spherical shell unit 1, in one embodiment, the second through hole 3 can be opened after the first hemispherical shell 11 and the second hemispherical shell 12 are connected, so that the third arcuate through groove 31 is located on the first hemispherical shell 11 and the fourth arcuate through groove 32 is located on the second hemispherical shell 12. In one embodiment, the third arcuate through groove 31 can be first opened on the first hemispherical shell 11 and the fourth arcuate through groove 32 can be opened on the second hemispherical shell 12, and then the first hemispherical shell 11 and the second hemispherical shell 12 can be bonded together so that the third arcuate through groove 31 and the fourth arcuate through groove 32 together form the second through hole 3. The second through hole 3 is suitable for installing the connecting pipe 4.

[0050] By providing a second through hole 3 at the connection between the first hemispherical shell 11 and the second hemispherical shell 12, and connecting a connecting tube 4 to the second through hole 3, the connection structure between the first hemispherical shell 11 and the second hemispherical shell 12 can be strengthened. Furthermore, when the first through holes 2 and the second through holes 3 are arranged in a cross pattern, a more uniform distribution can be achieved. When the connecting tubes 4 are connected to both ends of the first through hole 2 and the second through hole 3, the connecting tubes 4 can form a cross-shaped structure.

[0051] Alternatively, as Figure 3 As shown, the pump head body also includes four connecting tubes 4, which are respectively connected to the spherical shell unit 1, and the four connecting tubes 4 are respectively located at the opposite ends of the first through hole 2 and the second through hole 3, for example, by bonding or welding, so as to achieve the reinforcement of the connection structure between the first hemispherical shell 11 and the second hemispherical shell 12, and the connecting tubes 4 can achieve communication with the interior of the spherical shell unit 1.

[0052] Preferably, the four connecting pipes 4 are respectively a suction pipe 7, a discharge pipe 5, a plunger positioning pipe 8 and a valve body mounting pipe 6. The suction pipe 7 and the discharge pipe 5 are respectively connected to the two ends of the second through hole 3, and the plunger positioning pipe 8 and the valve body mounting pipe 6 are respectively connected to the two ends of the first through hole 2. In other words, the suction pipe 7 and the discharge pipe 5 are respectively located at the opposite ends of the spherical shell unit 1 and are respectively communicated with the spherical shell unit 1, and the plunger positioning pipe 8 and the valve body mounting pipe 6 are respectively located at the opposite ends of the spherical shell unit 1 and are respectively communicated with the spherical shell unit 1. Here, each of the spherical shell units 1 is respectively connected to a suction pipe 7, a discharge pipe 5, a plunger positioning pipe 8 and a valve body mounting pipe 6.

[0053] Alternatively, as Figure 3 and Figure 4 As shown, the connecting tube 4 includes a connected tube body 41 and a connecting section 42. The diameter d2 of the connecting section 42 is larger than the diameter d1 of the tube body 41, and the connecting section 42 is connected to the spherical shell unit 1. In other words, the diameter of the end of the connecting tube 4 connected to the spherical shell unit 1 is relatively large, which can increase the connection strength between the connecting tube 4 and the spherical shell unit 1. Here, the connecting section 42 is a tubular structure, and the tube body 41 and the connecting section 42 are connected to achieve mutual conductivity between the two.

[0054] Optionally, the diameter D of the spherical shell unit 1 is less than twice the diameter d1 of the tube body 41; and the wall thickness of the spherical shell unit 1 is equal to the wall thickness of the tube body 41. By defining the specific parameters of the spherical shell unit 1 and the connecting tube 4, the pump head body quality and overall stability can be guaranteed while maximizing the flow rate of the pump head body.

[0055] Optionally, the first hemispherical shell 11 and the second hemispherical shell 12 are connected by friction welding; and the connecting tube 4 is connected to the spherical shell unit 1 by friction welding. Here, the connection between the first hemispherical shell 11 and the second hemispherical shell 12 can refer to the connection of the first hemispherical shell 11 and the second hemispherical shell 12 of the same spherical shell unit 1 by friction welding; it can also refer to the connection of the first hemispherical shell 11 of one spherical shell unit 1 and the second hemispherical shell 12 of another spherical shell unit 1. Friction welding generates heat quickly, and the metal melts quickly on the friction surface. Due to high load extrusion, the presence of oxide scale, and the extrusion and repair of cracked surfaces, pressurized rotation makes the metal microparticles at the welding position delicate and elongated. At the same time, harmful gases find it difficult to enter the welding surface and affect the welding strength, thereby enhancing the connection strength between the first hemispherical shell 11 and the second hemispherical shell 12, and also enhancing the connection strength between the connecting tube 4 and the spherical shell unit 1.

[0056] Another embodiment of the present invention provides a pump comprising the pump head body described above. The pump has the same beneficial effects as the pump head body, which will not be described in detail herein. The pump may be a mud pump, a cementing pump, or a fracturing pump.

[0057] Another embodiment of the present invention provides a method for processing a pump head body, such as Figure 5 As shown, the method includes the following steps:

[0058] Step S100: connecting the first hemispherical shell 11 and the second hemispherical shell 12 by friction welding to form a spherical shell unit 1;

[0059] Step S200: connecting the different spherical shell units 1 by friction welding so that all the first hemispherical shells 11 and the second hemispherical shells 12 are in an alternatingly connected structure;

[0060] Step S300: opening a first through hole 2 and a second through hole 3 on different spherical shell units 1 respectively, so that the first through hole 2 and the second through hole 3 intersect;

[0061] Step S400: connecting the connecting pipe 4 at both ends of the first through hole 2 and the second through hole 3 by friction welding.

[0062] First, the first hemispherical shell 11 and the second hemispherical shell 12 are connected by friction welding to form a spherical shell unit 1. Then, the different spherical shell units 1 are connected in sequence. After the spherical shell units 1 are connected, the first through hole 2 and the second through hole 3 are opened, so that the first arcuate through groove 21 and the third arcuate through groove 31 are respectively located on the first hemispherical shell 11, and the second arcuate through groove 22 and the fourth arcuate through groove 32 are located on the second hemispherical shell 12. This avoids the trouble of aligning the first arcuate through groove 21 and the second arcuate through groove 22 caused by pre-grooving the first hemispherical shell 11 and the second hemispherical shell 12. It also ensures the parallelism of the first through holes 2 on all the spherical shell units 1 and the parallelism of the second through holes 3 on all the spherical shell units 1. In addition, opening the first through hole 2 and the second through hole 3 after the spherical shell units 1 are connected can relieve some of the stress after welding.

[0063] Optionally, step S100 includes the following steps:

[0064] Align the first surfaces to be connected of the first hemispherical shell 11 and the second hemispherical shell 12 ; here, the first surfaces to be connected refer to the edges of the recessed portions of the first hemispherical shell 11 and the second hemispherical shell 12 .

[0065] Applying pressure to the first hemispherical shell 11 and the second hemispherical shell 12 to fit the first hemispherical shell 11 and the second hemispherical shell 12 together; the pressure applied to the first hemispherical shell 11 and the second hemispherical shell 12 may be a first pressure greater than 5 tons and less than 10 tons;

[0066] The first hemispherical shell 11 and / or the second hemispherical shell 12 are controlled to rotate so that the first surfaces to be connected of the first hemispherical shell 11 and the second hemispherical shell 12 are melted to form the spherical shell unit 1, thereby achieving friction welding of the first hemispherical shell 11 and the second hemispherical shell 12.

[0067] In one embodiment, the first hemispherical shell 11 can be positioned to control the rotation of the second hemispherical shell 12, with the rotation speed of the second hemispherical shell 12 being greater than 500 rpm. In one embodiment, the second hemispherical shell 12 can be positioned to control the rotation of the first hemispherical shell 11, with the rotation speed of the first hemispherical shell 11 being greater than 500 rpm. In one embodiment, the first hemispherical shell 11 and the second hemispherical shell 12 can be simultaneously controlled to rotate toward each other, with the sum of the rotation speeds of the first hemispherical shell 11 and the second hemispherical shell 12 being greater than 500 rpm.

[0068] When controlling the rotation of the first hemispherical shell 11, a positioning fixture can be provided at the end of the rotating shaft to clamp the first hemispherical shell 11, and when the rotating shaft rotates, the first hemispherical shell 11 rotates. When controlling the rotation of the second hemispherical shell 12, a positioning fixture can be provided at the end of the rotating shaft to clamp the second hemispherical shell 12, and when the rotating shaft rotates, the second hemispherical shell 12 rotates. After welding, the weld is polished.

[0069] Optionally, step S200 includes the following steps:

[0070] Align the second surfaces to be connected of the two adjacent spherical shell units 1 ; here, the second surface to be connected is the outer wall of the spherical shell unit 1 , specifically, it can be the fitting surface of the first connecting platform 111 and the second connecting platform 121 .

[0071] Apply pressure to the two adjacent spherical shell units 1 respectively to make the two adjacent spherical shell units 1 fit together; the pressure applied to the two adjacent spherical shell units 1 can be a second pressure, which is greater than 5 tons and less than 10 tons

[0072] The two adjacent spherical shell units 1 are controlled to rotate relative to each other so that the second surfaces to be connected of the two spherical shell units 1 are melted and then connected, thereby achieving friction welding of the two adjacent spherical shell units 1 .

[0073] In one embodiment, one spherical shell unit 1 can be positioned to control the rotation of the other spherical shell unit 1, with the rotation speed of the spherical shell unit 1 exceeding 500 rpm. In another embodiment, the two spherical shell units 1 can be simultaneously controlled to rotate toward each other, with the sum of the rotation speeds of the two spherical shell units 1 exceeding 500 rpm. When controlling the rotation of the spherical shell unit 1, a positioning fixture can be provided at the end of the rotating shaft to clamp the spherical shell unit 1. When the rotating shaft rotates, the spherical shell unit 1 is driven to rotate.

[0074] Optionally, step S400 includes the following steps:

[0075] All the spherical shell units 1 are positioned, and one of the connecting tubes 4 is aligned with the third surface to be connected of the spherical shell unit 1, where the third surface to be connected corresponds to the position of the first through hole 2; the third surface to be connected may refer to the end surface of the connecting tube 4 and the outer wall of the spherical shell unit 1; here, the spherical shell unit 1 remains stationary after positioning;

[0076] Applying pressure to the connecting tube 4 so that the connecting tube 4 fits into one end of the first through hole 2; the pressure applied to the connecting tube 4 may be a third pressure, which is greater than 5 tons and less than 10 tons;

[0077] The connecting tube 4 is controlled to rotate so that it is melted and connected to the third surface to be connected of the spherical shell unit 1. The rotation speed of the connecting tube 4 is greater than 500 rpm. When the connecting tube 4 is controlled to rotate, a positioning fixture can be provided at the end of the rotating shaft to clamp the connecting tube 4. When the rotating shaft rotates, the connecting tube 4 is driven to rotate.

[0078] Here, the connection between the connecting tube 4 and the spherical shell unit 1 can be reinforced, for example, by adding a reinforcing ring or increasing the wall thickness of the connection between the connecting tube 4 and the spherical shell unit 1. Repeat the above steps to connect the four connecting tubes 4 to the spherical shell unit 1 in sequence. In this way, by positioning the spherical shell unit 1, the connecting tube 4 can be rotated to achieve friction welding between the connecting tube 4 and the spherical shell unit 1, making positioning and installation more convenient.

[0079] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A pump head body, characterized in that, The invention relates to a spherical shell unit (1) comprising at least two spherical shell units (1), all of which are connected in sequence, wherein the spherical shell unit (1) comprises a first hemispherical shell (11) and a second hemispherical shell (12), wherein the first hemispherical shell (11) and the second hemispherical shell (12) are connected by friction welding to form the spherical shell unit (1), wherein a first connecting platform (111) is provided on the outer wall of the first hemispherical shell (11), and a second connecting platform (121) is provided on the outer wall of the second hemispherical shell (12), wherein the first connecting platform (111) is connected to an adjacent The second connection platform (121) of the spherical shell unit (1) is connected by friction welding; all the first hemispherical shells (11) and the second hemispherical shells (12) are in an alternating connection structure; the first through hole (2) and the second through hole (3) are opened after the spherical shell units are connected, wherein the first through hole (2) is opened after the first hemispherical shell (11) and the second hemispherical shell (12) are connected, the first hemispherical shell (11) is provided with a first arc-shaped through groove (21), and the second hemispherical shell (12) is provided with a second arc-shaped through groove (21). The arc-shaped through groove (22) is connected to the edges of the first arc-shaped through groove (21) and the second arc-shaped through groove (22) of the same spherical shell unit (1) to form the first through hole (2), and the first through hole (2) passes through the spherical shell unit (1) along the first radial direction; the second through hole (3) is opened after the first hemispherical shell (11) and the second hemispherical shell (12) are connected; the first hemispherical shell (11) is provided with a third arc-shaped through groove (31), and the second hemispherical shell (12) is provided with a fourth arc-shaped through groove (32). The edges of the third arc-shaped through groove (31) and the fourth arc-shaped through groove (32) of the same spherical shell unit (1) are connected to form the second through hole (3), the second through hole (3) passes through the spherical shell unit (1) along the second radial direction, and the first through hole (2) and the second through hole (3) intersect; and the invention also includes four connecting pipes (4), the four connecting pipes (4) are respectively connected to the spherical shell unit (1), and the four connecting pipes (4) are respectively located at the opposite ends of the first through hole (2) and the second through hole (3).

2. The pump head body according to claim 1, characterized in that: The first hemispherical shell (11) and the second hemispherical shell (12) are connected by friction welding; and the connecting pipe (4) and the spherical shell unit (1) are connected by friction welding.

3. A method for processing a pump head body, for processing the pump head body according to any one of claims 1 to 2, characterized in that: include: The first hemispherical shell (11) and the second hemispherical shell (12) are connected by friction welding to form a spherical shell unit (1); Connecting the different spherical shell units (1) by friction welding so that all the first hemispherical shells (11) and the second hemispherical shells (12) present an alternately connected structure; A first through hole (2) and a second through hole (3) are respectively provided on different spherical shell units (1), so that the first through hole (2) and the second through hole (3) intersect; Connecting pipes (4) are respectively connected at both ends of the first through hole (2) and the second through hole (3) by friction welding.

4. The method for processing a pump head body according to claim 3, characterized in that: The method of connecting the first hemispherical shell (11) and the second hemispherical shell (12) by friction welding to form a spherical shell unit (1) comprises: Aligning the first surfaces to be connected of the first hemispherical shell (11) and the second hemispherical shell (12); Applying pressure to the first hemispherical shell (11) and the second hemispherical shell (12) to fit the first hemispherical shell (11) and the second hemispherical shell (12); The first hemispherical shell (11) and / or the second hemispherical shell (12) are controlled to rotate so that the first surfaces to be connected of the first hemispherical shell (11) and the second hemispherical shell (12) are melted and connected to form the spherical shell unit (1).

5. The method for processing a pump head body according to claim 3, characterized in that: The method of connecting the different spherical shell units (1) by friction welding comprises: Aligning the second surfaces to be connected of two adjacent spherical shell units (1); Applying pressure to two adjacent spherical shell units (1) respectively to make the two adjacent spherical shell units (1) fit together; The two adjacent spherical shell units (1) are controlled to rotate relative to each other, so that the second surfaces to be connected of the two spherical shell units (1) are melted and connected.

6. The method for processing a pump head body according to claim 3, characterized in that: The connecting pipe (4) connected at both ends of the first through hole (2) and the second through hole (3) by friction welding comprises: Positioning all the spherical shell units (1), aligning one of the connecting pipes (4) with the third surface to be connected of the spherical shell unit (1), wherein the third surface to be connected corresponds to the position of the first through hole (2); Applying pressure to the connecting tube (4) so ​​that the connecting tube (4) fits into one end of the first through hole (2); The connecting tube (4) is controlled to rotate so that the connecting tube (4) and the third surface to be connected of the spherical shell unit (1) are melted and then connected.

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