A device for multi-point swaging of a port for a valve assembly and method of use

Abstract

This invention relates to the field of mechanical assembly and discloses a device and method for multi-point punching and closing of a valve assembly. The multi-point punching and closing assembly includes a tightening device, an auxiliary guide cover plate device, a locking device, and a base plate. A mounting hole is provided on one end of the base plate, and the valve assembly is positioned and installed within the mounting hole. The tightening device is located at one end of the base plate, and its tightening end presses horizontally against the valve assembly. The auxiliary guide cover plate device and the locking device are respectively located on opposite sides of the other end of the base plate. The surface of the auxiliary guide cover plate device covers the valve assembly directly above it and is locked to the locking device. Two sets of punches are provided at the end of the punch assembly. These two sets of punches pass vertically through the surface of the auxiliary guide cover plate device and are guided symmetrically by the auxiliary guide cover plate device to abut against the punching points of the valve assembly. This invention enables synchronous punching of the valve assembly through the punch assembly, allowing the valve assembly to close in a short time.

Description

Technical Field

[0001] This invention relates to the field of mechanical assembly, specifically to a device and method for multi-point punching and closing of a valve assembly. Background Technology

[0002] During the assembly and use of the valve assembly, the locking state of the steel ball within the valve seat socket is a crucial factor determining the assembly's performance. According to usage requirements, before the valve assembly is put into use, the steel ball must be stably locked in the valve seat socket, and after locking, two core indicators must be met: first, the steel ball must have no play to ensure structural stability during the valve's opening and closing process; second, the steel ball must be precisely positioned at the center of the valve to ensure the coaxiality of the valve and subsequent related components, thereby guaranteeing the valve's sealing performance and operational reliability.

[0003] Currently, the industry commonly employs a "single-point punching and closing" process for locking steel balls in valve components. This involves punching a point around the ball socket in the valve seat using a single-point punching device. The plastic deformation of the valve seat material during punching creates a wrapping structure around the steel ball, ultimately locking it in place. However, this existing process has significant drawbacks in practical applications, severely restricting the production quality and efficiency of valve components: Firstly, the positional accuracy of the steel ball is difficult to control, failing to meet the centering requirements. Because the striking force of a single-point punch is unidirectional, and the striking point position relies on manual positioning, during the four-punch process, deviations in the force of each punch, slight shifts in the striking point position, and the cumulative effect of deformation of the valve seat material after multiple punches all cause the steel ball to deviate from the valve center after closing. This deviation directly violates the requirement for the valve assembly's steel ball to be centered, affecting not only the assembly accuracy of the valve and subsequent components but also potentially leading to valve jamming, sealing failure, and other problems, significantly reducing product qualification rates and even causing the component to be scrapped.

[0004] Secondly, the processing efficiency is low and it is difficult to adapt to the needs of mass production. The existing process requires four punches to complete the closing and locking of a single valve component. The processing flow of a single component is cumbersome and time-consuming, and the number of components processed per unit time is limited. This cannot meet the industry's efficiency requirements for mass production of valve components and restricts the overall capacity of the production line.

[0005] Third, the operation threshold is high and the quality consistency is poor. The position layout and force of the four punching points must be controlled entirely by the operator's operating experience, which requires a very high level of skill. If the spacing between the punching points is uneven or the force is inconsistent, it will not only aggravate the steel ball deviation problem, but also lead to significant differences in the closing quality of different valve components, further reducing the stability of product quality. At the same time, the high operation threshold also increases the personnel training cost and is not conducive to the standardized management of the production line.

[0006] In summary, the existing steel ball locking process for valve components based on single-point punching has insurmountable defects in terms of steel ball position accuracy control, processing efficiency, and ease of operation, and cannot meet the production requirements of high precision, high efficiency, and high consistency for valve components. Therefore, there is an urgent need for a steel ball locking processing solution that can solve the above problems. Summary of the Invention

[0007] In order to overcome the defects of the prior art, the purpose of this invention is to provide a device and method for multi-point punching and closing of a valve assembly, so as to solve the technical problem that single-point punching cannot guarantee the symmetry of the punching point position in the prior art.

[0008] Technical issues related to improving the punching efficiency and sealing performance of valve components.

[0009] This invention is achieved through the following technical solution: In a first aspect, the present invention provides a device for multi-point punching and closing of a valve assembly, comprising a multi-point punching and closing assembly and a punch assembly; The multi-point punching and closing assembly includes a clamping device, an auxiliary guide cover plate device, a locking device, and a base plate; A mounting hole is provided on one end of the base plate, and the valve assembly is positioned and installed in the mounting hole; the clamping device is provided at one end of the base plate, and the clamping end of the clamping device is horizontally pressed against the valve assembly; The auxiliary guide cover plate device and the locking device are respectively installed on both sides of the other end of the base plate, wherein the plate surface of the auxiliary guide cover plate device covers the top of the valve assembly and is locked to the locking device. The end of the punch assembly is provided with two sets of punches. The two sets of punches pass vertically through the plate surface of the auxiliary guide cover device and are guided by the auxiliary guide cover device to symmetrically abut against the punching point position of the valve assembly, so as to perform symmetrical punching at the punching point position of the valve assembly.

[0010] Preferably, the tightening device includes a screw, a support platform, a support pressure plate seat, and a tightening block; The support platform is vertically fixed to the end face of the base plate with screws, the support pressure plate seat is fixed to the plate surface of the base plate, one end of the screw is threaded into the support pressure plate seat through the support platform, one end of the clamping block abuts against the screw in the support pressure plate seat, and the other end contacts the valve assembly, and the clamping block is pressed against the valve assembly by the screw; the movement direction of the screw and the clamping block is coaxial.

[0011] Preferably, the auxiliary guide cover device includes a first boss, a pressure plate, and a guide sleeve block; The first boss is fixed to one side of the base plate. One end of the pressure plate is hinged to the first boss, and the other end is a free end. When the other end of the pressure plate is horizontally locked to the locking device, the valve assembly is located directly below the pressure plate. The pressure plate has a through hole at the position corresponding to the valve assembly. A first bushing is fitted inside the through hole. The guide sleeve block is placed on the through hole of the pressure plate. The guide sleeve block has a fixed angle hole that is connected to the through hole. The end of the punch assembly passes vertically through the fixed angle hole and is guided by the first bushing to abut against the valve assembly. The guide sleeve block is positioned on the pressure plate by a positioning pin.

[0012] Furthermore, the shape of the fixed-angle hole of the guide sleeve block corresponds to the section of the valve assembly that extends into the fixed-angle hole, so as to make the valve assembly lock onto the fixed-angle hole.

[0013] Furthermore, the locking device includes a second boss and a locking pin; The second boss is on the bottom plate and is located on the opposite side of the first boss; The second boss has a concave structure, wherein the two ends of the second boss are provided with connecting holes along the same horizontal axis, and the free end of the pressure plate is provided with a through hole. When the free end of the pressure plate is located between the two ends of the second boss, the locking pin is inserted into the connecting hole and the through hole in sequence to fix the free end of the pressure plate.

[0014] Furthermore, a second bushing is provided in the mounting hole of the base plate, and a positioning groove is provided on the second bushing. The valve assembly is placed on the second bushing and positioned by the positioning groove.

[0015] Furthermore, the valve assembly includes a valve seat and a steel ball; The valve seat is placed on the second bushing, the steel ball is placed on the valve seat, and the ends of the punch assembly symmetrically surround and abut against both sides of the steel ball; Oil passage holes are provided on both sides of the valve seat. The valve seat is positioned on the second bushing after being connected to the positioning groove through the oil passage holes.

[0016] Furthermore, it also includes a pin, which is used to position the valve seat on the second bushing. When the pin is inserted into the oil passage hole and extends into the positioning groove, the valve seat is positioned on the second bushing.

[0017] Furthermore, the punch assembly includes two sets of interlocking punches; The punch comprises, from top to bottom, a cylindrical section, a guide section, and a punch head; The cylindrical section and the punch are coaxially arranged. The guide section has a semi-cylindrical structure and the diameter of the guide section is larger than that of the cylindrical section. When the two sets of punches are engaged, the guide sections of the two sets of punches abut against the fixed angle hole of the guide sleeve block.

[0018] Secondly, the present invention also provides a method of using a device for multi-point punching and closing of a valve assembly, based on the above-described device for multi-point punching and closing of a valve assembly, comprising the following process: Open the auxiliary guide cover device and position the valve assembly into the mounting hole on the bottom plate, and press it horizontally onto the valve assembly through the tightening end of the tightening device; Next, fix the auxiliary guide cover plate device with the locking device. At this time, the valve assembly is located directly below the plate surface of the auxiliary guide cover plate device. The end of the punch assembly is vertically passed through the plate surface of the auxiliary guide cover plate device and guided by the auxiliary guide cover plate device to abut against the valve assembly. Use a hammer or press to make multiple sets of symmetrical punches on the valve assembly.

[0019] Compared with the prior art, the present invention has the following beneficial technical effects: This invention provides a device for multi-point punching and closing of a valve assembly. The mounting holes of the base plate define the radial position of the valve assembly, and then the clamping device presses the valve assembly horizontally to prevent the valve assembly from shifting and shaking during the punching and closing process. The punch assembly passes vertically through the surface of the auxiliary guide cover device and is guided by it to abut against the valve assembly, avoiding problems such as punch tilting or uneven depth caused by the punch tilting, and ensuring the symmetry of the punching point position on the valve assembly. This invention can perform synchronous punching on the valve assembly through the punch assembly, so that the closing of the valve assembly can be completed in a short time.

[0020] Furthermore, the support platform is vertically fixed to the end face of the base plate with screws, and the support pressure plate seat is fixed to the plate surface of the base plate. One end of the screw is threaded into the support pressure plate seat through the support platform. One end of the clamping block abuts against the screw in the support pressure plate seat, and the other end contacts the valve assembly. The clamping block is pressed against the valve assembly by the screw, which provides horizontal pressure to the valve assembly and ensures that the valve assembly does not shift or shake during the closing process.

[0021] Furthermore, the first boss is fixed to one side of the base plate. One end of the pressure plate is hinged to the first boss, and the other end is a free end. When the other end of the pressure plate is horizontally locked to the locking device, the valve assembly is located directly below the pressure plate, which facilitates the punch assembly to punch the valve assembly through the pressure plate. The pressure plate has a through hole at the position corresponding to the valve assembly. A first bushing is fitted inside the through hole. The guide block is placed on the through hole of the pressure plate. The guide block has a fixed angle hole, which is connected to the through hole. The end of the punch assembly passes vertically through the fixed angle hole and is guided by the first bushing to abut against the valve assembly. The fixed angle hole plays a role in fixing the angle of the punch assembly, and the first bushing plays a role in centering the punch assembly, so that the punch assembly can punch the valve assembly synchronously. The guide block is positioned on the pressure plate by a positioning pin, so that the guide block can be positioned on the pressure plate without shaking.

[0022] Furthermore, the shape of the fixed angle hole of the guide sleeve block corresponds to the section of the valve assembly that extends into the fixed angle hole, so that the valve assembly is locked in the fixed angle hole, ensuring the punching point position of the punch assembly on the valve assembly.

[0023] Furthermore, the locking device secures the pressure plate during the punching process, preventing it from shaking and affecting the punch assembly.

[0024] Furthermore, a second bushing is provided in the mounting hole of the base plate, and a positioning groove is provided on the second bushing. The valve assembly is placed on the second bushing and positioned by the positioning groove, so that the valve assembly can be positioned and aligned on the base plate, which facilitates the improvement of the punching efficiency of the punch assembly on the valve assembly.

[0025] Furthermore, the oil passage holes on both sides of the valve seat are matched with the positioning grooves to allow the valve seat to be positioned on the second bushing.

[0026] Furthermore, when the pin is inserted into the oil passage hole and extends into the positioning groove, the valve seat is positioned on the second bushing, which improves the accuracy of the valve seat positioning on the second bushing.

[0027] Furthermore, by using a combination of two punches and welding them with hard alloy, the strength of the punch is improved, allowing the two punching points to be completed synchronously during symmetrical punching, thus ensuring the symmetry of the punching point positions.

[0028] The present invention also provides a method of using a device for multi-point punching and closing of a valve assembly, wherein the valve assembly is horizontally pressed onto the base by the tightening end of the tightening device, and the punch assembly is guided and positioned by an auxiliary guide cover device, so that the punch assembly can punch symmetrically at the punching point position of the valve assembly. Attached Figure Description

[0029] Figure 1This is a structural diagram of the multi-point punching and closing device in an embodiment of the present invention; Figure 2 This is a top view of the multi-point punching and closing device in an embodiment of the present invention; Figure 3 This is a side sectional view of the multi-point punching and closing device in an embodiment of the present invention; Figure 4 This is a schematic diagram of the punch structure in an embodiment of the present invention; Figure 5 This is a top view of the punch in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the valve assembly in an embodiment of the present invention; In the diagram: 1. Multi-point punching and closing assembly; 2. Tightening device; 3. Auxiliary guide cover plate device; 4. Locking device; 5. Base plate; 6. Punch assembly; 7. Pin; 8. Valve assembly; 21. Screw; 22. Support platform; 23. Support pressure plate seat; 24. Tightening block; 31. First boss; 32. Pressure plate; 33. Locating pin; 34. Guide sleeve block; 35. Angle hole; 36. First bushing; 41. Second boss; 42. Locking pin; 51. Second bushing; 52. Positioning groove; 61. Punch; 611. Cylindrical section; 612. Guide section; 613. Punch head; 81. Valve seat; 82. Steel ball; 83. Oil passage hole. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] The purpose of this invention is to provide a device and method for multi-point punching and closing of a valve assembly, so as to solve the technical problem that single-point punching cannot guarantee the symmetry of the punching point position in the prior art.

[0033] The present invention will now be described in further detail with reference to the accompanying drawings: Example 1 See Figure 1 , Figure 2 as well as Figure 3 In one embodiment of the present invention, a device for multi-point punching and closing of a valve assembly is provided, including a multi-point punching and closing assembly 1 and a punch assembly 6; the multi-point punching and closing assembly 1 includes a tightening device 2, an auxiliary guide cover plate device 3, a locking device 4, and a base plate 5; a mounting hole is provided on one end of the base plate 5, and the valve assembly 8 is positioned and installed in the mounting hole; the tightening device 2 is disposed at one end of the base plate 5, and the tightening end of the tightening device 2 is horizontally pressed against the valve assembly 8; the auxiliary guide cover plate device 3 and the locking device 4 are respectively disposed on the other two sides of the base plate 5, wherein the plate surface of the auxiliary guide cover plate device 3 covers the valve assembly 8 directly above it and is locked to the locking device 4; the end of the punch assembly 6 is provided with two sets of punches 613, the two sets of punches 613 pass vertically through the plate surface of the auxiliary guide cover plate device 3, and are guided by the auxiliary guide cover plate device 3 to symmetrically abut against the punching point position of the valve assembly 8, for symmetrical punching at the punching point position of the valve assembly 8.

[0034] Specifically, the tightening device 2 includes a screw 21, a support platform 22, a support pressure plate seat 23, and a tightening block 24. The support platform 22 is vertically fixed to the end face of the base plate 5 by screws, and the support pressure plate seat 23 is fixed to the plate surface of the base plate 5. One end of the screw 21 is threadedly connected to the support pressure plate seat 23 through the support platform 22. One end of the tightening block 24 abuts against the screw 21 inside the support pressure plate seat 23, and the other end contacts the valve assembly 8. The screw 21 pushes and drives the tightening block 24 to press against the valve assembly 8. The screw 21 and the tightening block 24 are coaxial in their direction of movement.

[0035] Specifically, the auxiliary guide cover plate device 3 includes a first boss 31, a pressure plate 32, and a guide sleeve block 34; the first boss 31 is fixed to one side of the base plate 5, one end of the pressure plate 32 is hinged to the first boss 31, and the other end is a free end. When the other end of the pressure plate 32 is horizontally locked on the locking device 4, the valve assembly 8 is located directly below the pressure plate 32; wherein the plate surface of the pressure plate 32 is provided with a through hole at the position corresponding to the valve assembly 8, wherein a first bushing 36 is sleeved in the through hole, the guide sleeve block 34 is placed on the through hole of the pressure plate 32, wherein the guide sleeve block 34 is provided with a fixed angle hole 35, wherein the fixed angle hole 35 is connected to the through hole, the end of the punch assembly 6 passes vertically through the fixed angle hole 35 and is guided by the first bushing 36 to abut against the valve assembly 8, wherein the guide sleeve block 34 is positioned on the pressure plate 32 by a positioning pin 33.

[0036] The shape of the fixed angle hole 35 of the guide sleeve block 34 corresponds to the section of the valve assembly 8 that extends into the fixed angle hole 35, so that the valve assembly 8 is locked in the fixed angle hole 35.

[0037] Specifically, the locking device 4 includes a second boss 41 and a locking pin 42; the second boss 41 is on the base plate 5 and located on the opposite side of the first boss 31; the second boss 41 has a concave structure, wherein the two ends of the second boss 41 are provided with connecting holes along the same horizontal axis, and the free end of the pressure plate 32 is provided with a through hole. When the free end of the pressure plate 32 is located between the two ends of the second boss 41, the locking pin 42 is inserted into the connecting hole and the through hole in sequence to fix the free end of the pressure plate 32.

[0038] Specifically, a second bushing 51 is provided in the mounting hole of the base plate 5, and a positioning groove 52 is provided on the second bushing 51. The valve assembly 8 is placed on the second bushing 51 and positioned by the positioning groove 52.

[0039] according to Figure 6As shown, in this embodiment, the valve assembly 8 includes a valve seat 81 and a steel ball 82; the valve seat 81 is placed on the second bushing 51, the steel ball 82 is placed on the valve seat 81, and the end of the punch assembly 6 symmetrically surrounds and abuts against both sides of the steel ball 82; oil passage holes 83 are respectively opened on both sides of the valve seat 81, and the valve seat 81 is positioned on the second bushing 51 after communicating with the positioning groove 52 through the oil passage holes 83.

[0040] This embodiment also includes a pin 7, which is used to position the valve seat 81 on the second bushing 51. When the pin 7 is inserted into the oil passage hole 83 and extends into the positioning groove 52, the valve seat 81 is positioned on the second bushing 51.

[0041] according to Figure 4 and Figure 5 As shown, in this embodiment, the punch assembly 6 includes two sets of punches 61 that are fastened together. The punch 61 includes a cylindrical section 611, a guide section 612, and a punch head 613 in sequence from top to bottom. The cylindrical section 611 and the punch head 613 are coaxially arranged. The guide section 612 has a semi-cylindrical structure, and the diameter of the guide section 612 is larger than the diameter of the cylindrical section 611. When the two sets of punches 61 are fastened together, the guide sections 612 of the two sets of punches 61 abut against the fixed angle hole 35 of the guide sleeve block 34.

[0042] In this embodiment, the punch 61 adopts an eccentric design. The conical punch head 613 and the cylindrical section 611 of the punch are concentric. The guide section R8-0.013-0.028 is eccentric to the punch head 613 by 2.75±0.03. After the two punches 61 are combined, the eccentricity is just enough to ensure that the punch head 613 is positioned on the circumference of φ5.5. The outer circles of the two punches 61 are positioned by the bushing to ensure that the valve seat and the punch are concentric after combination.

[0043] In this embodiment, two punches are combined into a group, and the punch base is enlarged by eccentric positioning to ensure the strength of the punch. Hard alloy is welded to the head of the punch, and the radius of the tip is precisely required to be R0.3±0.03 to ensure the strength of the punch. This ensures that the height of the two punches is always consistent, and the two points of symmetrical punching can be completed synchronously, ensuring that the steel ball is centered after punching. The punch is guided by a combination of a first bushing and a guide block. The bushing ensures the centering of the punch after assembly, and the front of the angle-fixing hole of the guide block ensures the positioning of the combined punch at one angle. Then, the side is flipped to ensure the positioning of the punch at the other angle, which is convenient and quick.

[0044] In summary, this embodiment provides a multi-point punching and closing device for a valve assembly. The mounting holes on the base plate define the radial position of the valve assembly, and the clamping device presses the valve assembly horizontally to prevent the valve assembly from shifting or shaking during the punching and closing process. The punch assembly passes vertically through the surface of the auxiliary guide cover device and is guided by it to abut against the valve assembly, avoiding problems such as punch point skew or uneven depth caused by punch tilting, and ensuring the symmetry of the punch point position on the valve assembly. This invention enables the valve assembly to be punched synchronously through the punch assembly, allowing the valve assembly to be closed in a short time.

[0045] Example 2 This embodiment provides a method for using a device for multi-point punching and closing of a valve assembly. Based on the above-described device for multi-point punching and closing of a valve assembly, the method includes the following process: When in use, first open the pressure plate 32, combine the valve seat 81 and the steel ball 82 and put them into the second bushing 51 of the bottom plate 5. Align the valve seat 81 and the positioning groove with the pin 7, tighten the valve seat with the clamping block 24, remove the pin 7, and then fix the pressure plate 32 on the second boss 31. After the two sets of punches 61 are combined, they are placed at the punching point position of the valve seat 81 through the fixed angle hole 35 in the guide sleeve block 34 and the first bushing 36. The valve seat 81 is then symmetrically punched and closed in one direction using a hammer or press. Take out two sets of punches 61, flip the guide sleeve block 34 and place it on the pressure plate 32. Then, combine the two sets of punches 61 and place them on the punching point position of the valve seat 81 through the fixed angle hole 35 in the guide sleeve block 34 and the first bushing 36. Use a hammer or press to complete the symmetrical punching point closing in another direction of the valve seat 81. The test verifies that the steel ball after closing is locked in the center of the valve seat and cannot be moved, which meets the technical requirements of the valve component.

[0046] In summary, the present invention also provides a method for using a multi-point punching and closing device for a valve assembly. The valve assembly is horizontally pressed onto a base by the tightening end of a tightening device, and the punch assembly is guided and positioned by an auxiliary guide cover device, facilitating symmetrical punching at punching points in one direction of the valve assembly. Simultaneously, the flipping guide block allows the punch assembly to perform symmetrical punching at punching points in another direction of the valve assembly.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A device for multi-point punching and closing of a valve assembly, characterized in that, It includes a multi-point punching closing assembly (1) and a punch assembly (6); The multi-point punching and closing assembly (1) includes a clamping device (2), an auxiliary guide cover plate device (3), a locking device (4), and a base plate (5); The base plate (5) has an installation hole on one end of its surface, and the valve assembly (8) is positioned and installed in the installation hole; the clamping device (2) is located at one end of the base plate (5), and the clamping end of the clamping device (2) is horizontally pressed against the valve assembly (8); The auxiliary guide cover plate device (3) and the locking device (4) are respectively set on the other side of the bottom plate (5), wherein the plate surface of the auxiliary guide cover plate device (3) is placed directly above the valve assembly (8) and locked on the locking device (4); The end of the punch assembly (6) is provided with two sets of punches (613). The two sets of punches (613) pass vertically through the plate surface of the auxiliary guide cover device (3) and are guided by the auxiliary guide cover device (3) to symmetrically abut against the punching point position of the valve assembly (8) for symmetrical punching at the punching point position of the valve assembly (8).

2. The device for multi-point punching and closing of a valve assembly according to claim 1, characterized in that, The clamping device (2) includes a screw (21), a support platform (22), a support pressure plate seat (23), and a clamping block (24); The support platform (22) is vertically fixed to the end face of the base plate (5) by screws. The support pressure plate seat (23) is fixed to the plate surface of the base plate (5). One end of the screw (21) is threadedly connected to the support pressure plate seat (23) through the support platform (22). One end of the clamping block (24) abuts against the screw (21) in the support pressure plate seat (23), and the other end contacts the valve assembly (8). The screw (21) pushes and drives the clamping block (24) to press against the valve assembly (8). The movement directions of the screw (21) and the clamping block (24) are coaxial.

3. The device for multi-point punching and closing of a valve assembly according to claim 1, characterized in that, The auxiliary guide cover plate device (3) includes a first boss (31), a pressure plate (32), and a guide sleeve block (34). The first boss (31) is fixed on one side of the base plate (5). One end of the pressure plate (32) is hinged to the first boss (31), and the other end is a free end. When the other end of the pressure plate (32) is horizontally locked on the locking device (4), the valve assembly (8) is located directly below the pressure plate (32). The pressure plate (32) has a through hole at the position corresponding to the valve assembly (8), and a first bushing (36) is fitted inside the through hole. The guide block (34) is placed on the through hole of the pressure plate (32), and the guide block (34) has a fixed angle hole (35), which is connected to the through hole. The end of the punch assembly (6) passes vertically through the fixed angle hole (35) and is guided to abut against the valve assembly (8) by the first bushing (36). The guide block (34) is positioned on the pressure plate (32) by a positioning pin (33).

4. The device for multi-point punching and closing of a valve assembly according to claim 3, characterized in that, The shape of the fixed angle hole (35) of the guide sleeve block (34) corresponds to the section of the valve assembly (8) that extends into the fixed angle hole (35), so that the valve assembly (8) is locked in the fixed angle hole (35).

5. The device for multi-point punching and closing of a valve assembly according to claim 3, characterized in that, The locking device (4) includes a second boss (41) and a locking pin (42). The second boss (41) is on the base plate (5) and is located on the opposite side of the first boss (31); The second boss (41) has a concave structure, wherein the two ends of the second boss (41) are provided with connecting holes along the same horizontal axis, and the free end of the pressure plate (32) is provided with a through hole. When the free end of the pressure plate (32) is located between the two ends of the second boss (41), the locking pin (42) is inserted into the connecting hole and the through hole in sequence to fix the free end of the pressure plate (32).

6. The device for multi-point punching and closing of a valve assembly according to claim 5, characterized in that, The mounting hole of the base plate (5) is provided with a second bushing (51), and a positioning groove (52) is provided on the second bushing (51). The valve assembly (8) is placed on the second bushing (51) and positioned by the positioning groove (52).

7. The device for multi-point punching and closing of a valve assembly according to claim 6, characterized in that, The valve assembly (8) includes a valve seat (81) and a steel ball (82). The valve seat (81) is placed on the second bushing (51), the steel ball (82) is placed on the valve seat (81), and the ends of the punch assembly (6) are symmetrically wrapped around and abut against both sides of the steel ball (82). Oil passage holes (83) are respectively opened on both sides of the valve seat (81). The valve seat (81) is connected to the positioning groove (52) through the oil passage hole (83) and then positioned on the second bushing (51).

8. The device for multi-point punching and closing of a valve assembly according to claim 7, characterized in that, It also includes a pin (7), which is used to position the valve seat (81) on the second bushing (51). When the pin (7) is inserted into the oil passage hole (83) and extends into the positioning groove (52), the valve seat (81) is positioned on the second bushing (51).

9. The device for multi-point punching and closing of a valve assembly according to claim 7, characterized in that, The punch assembly (6) includes two sets of interlocking punches (61). The punch (61) includes a cylindrical section (611), a guide section (612) and a punch head (613) from top to bottom. The cylindrical section (611) and the punch (613) are coaxially arranged. The guide section (612) has a semi-cylindrical structure and the diameter of the guide section (612) is larger than that of the cylindrical section (611). When the two sets of punches (61) are engaged, the guide sections (612) of the two sets of punches (61) abut against the fixed angle hole (35) of the guide sleeve block (34).

10. A method of using a multi-point punching and closing device for a valve assembly, characterized in that, A multi-point punching and closing device for a valve assembly according to any one of claims 1-9 includes the following process: Open the auxiliary guide cover device (3) and position the valve assembly (8) in the mounting hole of the bottom plate (5), and press it horizontally onto the valve assembly (8) by the tightening end of the tightening device (2); Then fix the auxiliary guide cover plate device (3) with the locking device (4). At this time, the valve assembly (8) is located directly below the plate surface of the auxiliary guide cover plate device (3). The end of the punch assembly (6) is vertically passed through the plate surface of the auxiliary guide cover plate device (3) and guided by the auxiliary guide cover plate device (3) to abut against the valve assembly (8). Use a hammer or press to make multiple sets of symmetrical punches on the valve assembly.

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