Fastening tool for packing nut of stuffing box

Abstract

The present disclosure relates to a fastening tool for packing box compression nut, the fastening tool comprising: a handle comprising a holding section and a compression section, the compression section being connected at one end of the holding section; and a locking portion connected on the compression section, the end of the locking portion being used to extend into the blind hole of the packing box compression nut, and after the end of the locking portion extends into the blind hole, the surface of the compression section near the locking portion is used to abut against the end of the packing box compression nut in the axial direction. When the packing box compression nut is rotated by the fastening tool, the end of the locking portion will not slip and collide in the blind hole, and the fastening tool and the packing box compression nut will not produce uncontrollable displacement during disassembly, which not only ensures the safety of the operation of the construction personnel, but also reduces the probability of hammering the bottom wall and the side wall of the blind hole, so as to reduce the probability of damage to the blind hole. Thus, the service life of the packing box compression nut is improved, and the long-period operation cost of the reciprocating pump is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of chemical equipment parts repair technology, specifically to a fastening tool for a packing box clamping nut. Background Technology

[0002] The hydraulic end packing seal of a reciprocating pump relies on compressing the packing to ensure tight contact between it and the surface of the plunger and the inner surface of the stuffing box. When the packing wears down during prolonged operation, the pumped medium will leak along the gaps between the plunger and the packing, or between the packing and the stuffing box. This leakage accelerates the wear of the hydraulic end packing, leading to increased leakage and severely impacting the safe, long-term operation of the equipment. The primary method for adjusting and tightening the packing in a reciprocating pump is to tighten the packing compression nut at the tail end of the stuffing box.

[0003] When the packing leakage exceeds a certain amount, the tightening nut needs to be adjusted to increase the packing clamping force and reduce leakage. The existing method for adjusting the packing box tightening nut involves inserting a thin, long, round rod into a set of evenly distributed blind holes on the outer circumference of the nut, using a lever principle to rotate the nut. However, the rod is prone to slipping during use, causing the center of the rod to become non-perpendicular to the center of the tightening nut. This not only requires applying greater force to the rod, making it laborious, but also repeatedly hammers the bottom and side walls of the blind holes, causing the internal diameter of the blind holes to enlarge and the hole walls to become smooth. At this point, the blind hole cannot be properly fitted with the rod, and the next blind hole must be replaced. After multiple consecutive blind holes are damaged, the packing lock nut will no longer be able to tighten, leading to increased packing leakage, making the equipment unable to continue operating, and requiring shutdown and replacement of the packing clamping lock nut. Utility Model Content

[0004] The purpose of this disclosure is to provide a fastening fixture for a stuffing box clamping nut, so as to reduce the probability of damage to the blind hole of the nut while fastening the stuffing box clamping nut.

[0005] To achieve the above objectives, this disclosure provides a fastening fixture for a stuffing box clamping nut, the fastening fixture comprising: The handle includes a gripping section and a clamping section, the clamping section being connected to one end of the gripping section; and A locking part is connected to the clamping section. The end of the locking part is used to extend into the blind hole of the packing box clamping nut. After the end of the locking part extends into the blind hole, the surface of the clamping section near the locking part is used to abut against the end of the packing box clamping nut in the axial direction.

[0006] Optionally, in the width direction of the handle, the size of the pressing section is larger than the size of the gripping section.

[0007] Optionally, the clamping section includes a connecting plate and a pressure plate. The two ends of the connecting plate are respectively connected to the gripping section and the pressure plate. The pressure plate is used to cooperate with the packing box clamping nut. The connecting plate has a gradually expanding structure where the size gradually increases from the connection with the gripping section to the connection with the pressure plate.

[0008] Optionally, the locking portion includes: A connecting block, connected to the clamping section, and the connecting block extending along the thickness direction of the handle; and A locking element is connected to the connecting block and spaced apart from the clamping section. The locking element is used to extend into the blind hole of the packing box clamping nut, and the connecting block can abut against the outer wall surface of the packing box clamping nut after the locking element extends into the blind hole.

[0009] Optionally, the locking member includes a locking section and a connecting section arranged in a stepped manner, the connecting section cooperating with the connecting block, and the locking section being used to extend into the blind hole.

[0010] Optionally, the end of the locking segment is an arc-shaped surface.

[0011] Optionally, the axial direction of the locking member is perpendicular to the surface of the connecting block.

[0012] Optionally, in the length direction of the handle, the clamping section is provided with a plurality of mounting ports at intervals, and the connecting block selectively mates with one of the mounting ports.

[0013] Optionally, the handle is a one-piece molded structure.

[0014] Optionally, both the handle and the locking part are made of metal.

[0015] Through the above technical solution, the clamping section is tightly attached to the end face of the stuffing box clamping nut, and the locking part extends into the blind hole on the stuffing box clamping nut. The locking part and the clamping section can also limit the axial direction of the stuffing box clamping nut, so that the end of the locking part can be fixed in the blind hole. When the stuffing box clamping nut is rotated by the fastening fixture, the end of the locking part will not slip or bump in the blind hole. In this way, during the disassembly process, the fixture and the stuffing box clamping nut will not experience uncontrollable displacement. This ensures the safety of construction personnel during the tightening and disassembly of the stuffing box clamping nut, and also reduces the probability of hammering the bottom and side walls of the blind hole, thereby reducing the probability of damage to the blind hole. This improves the service life of the stuffing box clamping nut and reduces the long-term operating cost of the reciprocating pump.

[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the fastening fixture for the stuffing box clamping nut and its engagement with the stuffing box clamping nut according to one embodiment of this disclosure.

[0018] Figure 2 This is another perspective schematic diagram of the fastening fixture for the stuffing box clamping nut and its engagement with the stuffing box clamping nut according to one embodiment of the present disclosure.

[0019] Figure 3 This is a schematic diagram of a fastening fixture for a stuffing box clamping nut according to one embodiment of the present disclosure.

[0020] Figure 4 This is a front view of a fastening fixture for a stuffing box clamping nut according to one embodiment of the present disclosure.

[0021] Figure 5 This is a schematic diagram of a packing box clamping nut fastened by a fastening fixture according to one embodiment of the present disclosure.

[0022] Explanation of reference numerals in the attached figures 1-Handle; 11-Grip section; 12-Pressure section; 121-Connecting plate; 122-Pressure plate; 2-Connecting block; 3-Locking component; 4-Filling box clamping nut; 41-Blind hole; 42-Outer wall surface. Detailed Implementation

[0023] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0024] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" are used in relation to the outline of the corresponding components. Furthermore, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements.

[0025] According to one embodiment of this disclosure, such as Figures 1 to 5As shown, a fastening fixture for a stuffing box compression nut is provided. The fastening fixture may include a handle 1 and a locking part. The handle 1 may include a gripping section 11 and a clamping section 12, with the clamping section 12 connected to one end of the gripping section 11. The locking part may be connected to the clamping section 12, and the end of the locking part is used to extend into the blind hole 41 of the stuffing box compression nut 4. After the end of the locking part extends into the blind hole 41, the surface of the clamping section 12 near the locking part is used to abut against the axial end of the stuffing box compression nut 4.

[0026] Through the above technical solution, the clamping section 12 is tightly attached to the end face of the stuffing box clamping nut 4, and the locking part extends into the blind hole 41 on the stuffing box clamping nut 4. The locking part and the clamping section 12 can also limit the stuffing box clamping nut 4 in the axial direction, so that the end of the locking part can be fixed in the blind hole 41. When the stuffing box clamping nut 4 is rotated by the fastening fixture, the end of the locking part will not slip or bump in the blind hole 41. In this way, during the disassembly process, the fixture and the stuffing box clamping nut 4 will not have uncontrollable displacement. This not only ensures the safety of the construction personnel during the fastening and disassembly of the stuffing box clamping nut 4, but also reduces the probability of hammering the bottom wall and side wall of the blind hole 41, thereby reducing the probability of damage to the blind hole 41. This improves the service life of the stuffing box clamping nut 4 and reduces the long-term operating cost of the reciprocating pump.

[0027] It should be noted that the handle 1 can be a one-piece molded structure. One-piece molding avoids potential weak points in the connections between the various parts of the handle 1, which are often joined by welding or splicing. This makes the overall structure of the handle 1 more stable and stronger in terms of load-bearing capacity, thus extending its service life. Both the handle 1 and the locking part can be made of metal. Metal has high strength and high hardness, capable of withstanding significant forces and torques during fastening operations, preventing deformation, breakage, or other damage to the tooling due to insufficient material strength. Specifically, it can be made of iron, steel, or aluminum; this disclosure does not limit the choice.

[0028] Furthermore, such as Figures 1 to 3 As shown, in the width direction of the handle, the size of the clamping section 12 can be larger than that of the gripping section 11. A wider clamping section 12 increases the contact area with the end face of the stuffing box clamping nut 4 in the axial direction. When abutting against the end of the stuffing box clamping nut 4, the force can be transmitted more evenly to the stuffing box clamping nut 4, preventing deformation of the end of the stuffing box clamping nut 4 due to excessive localized force and protecting the structural integrity of the stuffing box clamping nut 4. At the same time, the wider clamping section 12 also provides more space for the installation of the locking part, facilitating a stable connection between the locking part and the clamping section 12 and reducing the problem of insecure connection caused by limited installation space.

[0029] Furthermore, such as Figures 1 to 4As shown, the clamping section 12 may include a connecting plate 121 and a pressure plate 122. The two ends of the connecting plate 121 are connected to the holding section 11 and the pressure plate 122, respectively. The pressure plate 122 is used to cooperate with the stuffing box clamping nut 4. The connecting plate 121 has a gradually expanding structure, with its dimensions gradually increasing from the connection point with the holding section 11 to the connection point with the pressure plate 122. This gradually expanding structure of the connecting plate 121 buffers between the pressure plate 122 and the holding section 11, optimizing the force transmission path, achieving smooth force transmission, effectively avoiding stress concentration caused by abrupt changes in size, reducing the risk of breakage of the connecting plate 121 under stress, and improving the overall structural strength and load-bearing capacity of the clamping section 12.

[0030] According to one embodiment of this disclosure, such as Figures 1 to 4 As shown, the locking part may include a connecting block 2 and a locking member 3. The connecting block 2 can be connected to the clamping section 12, and extends along the thickness direction of the handle 1. The locking member 3 can be connected to the connecting block 2 and is spaced apart from the clamping section 12. The locking member 3 is used to extend into the blind hole 41 of the stuffing box clamping nut 4, and the connecting block 2, after the locking member 3 extends into the blind hole 41, can abut against the outer wall surface 42 of the stuffing box clamping nut 4. It should be noted that there are multiple blind holes 41, which are circumferentially formed on the outer wall surface 42 of the stuffing box clamping nut 4. The connecting block 2 can abut against the outer wall surface 42. Thus, the size of the locking member 3 can be set such that when the connecting block 2 abuts against the outer wall surface 42, the depth of its extension into the blind hole 41 is less than the depth of the blind hole 41 itself. In this way, since the connecting block 2 can abut against the outer wall surface 42, the fastening fixture can form a unilateral radial limit on the packing box clamping nut 4. The locking member 3 and the clamping section 12 can limit the packing box clamping nut 4 axially. In this way, the end of the locking member 3 does not need to contact the bottom of the blind hole 41, and the packing box clamping nut 4 can be fastened by the fastening fixture, thereby further reducing the probability of damage to the blind hole 41 and increasing the service life of the packing box clamping nut 4.

[0031] Furthermore, such as Figure 1 and Figure 2As shown, the locking component 3 may include a stepped locking section and a connecting section. The connecting section cooperates with the connecting block 2, and the locking section is used to extend into the blind hole 41. This allows the locking component 3 and the connecting block 2 to be detachably connected. This facilitates the replacement of locking components 3 with different diameters and lengths to accommodate different blind hole 41 sizes, ensuring a better fit between the locking section and the blind hole 41. For different sizes of blind holes 41, a locking section with a diameter matching its inner diameter can be selected, reducing the probability of the locking section wobbling after extending into the blind hole 41. This further reduces the probability of damage to the blind hole 41 while improving the versatility of the fastening fixture. It also facilitates the installation and removal of the locking component 3. When the locking component 3 becomes worn, it can be quickly replaced, improving the maintenance convenience of the fixture and ensuring long-term reliability. Here, the outer wall of the locking component section can be a screen, and the connecting section and the connecting block 2 can be threaded together. Of course, the locking component 3 can also be a pin that can be inserted into the connecting block 2; this disclosure does not limit this.

[0032] Here, as Figure 3 As shown, the end of the locking section can also be configured as an arc-shaped surface. The arc-shaped surface effectively prevents the sharp edges of the locking section from scratching the inner wall of the blind hole 41 when it extends into the blind hole 41. This protects the integrity of the inner wall of the blind hole 41, extends the service life of the stuffing box clamping nut 4, and also provides good guidance. When the locking section is inserted into the blind hole 41, the arc-shaped surface guides the locking section smoothly into place, reducing insertion resistance. Furthermore, the arc-shaped surface makes the contact between the locking section and the inner wall of the blind hole 41 smoother. During tightening, the force is transmitted to the inner wall of the blind hole 41 through the arc-shaped surface, avoiding local stress concentration and preventing deformation of the inner wall of the blind hole 41 due to excessive local force. It also reduces wear on the end of the locking section, extends the service life of the locking component 3, and ensures that the tooling maintains good positioning and tightening effects over a long period.

[0033] It should be noted that the axial direction of the locking element 3 is perpendicular to the surface of the connecting block 2. This ensures that the locking element 3 can be fully inserted into the blind hole 41 while the connecting block 2 can be tightly pressed against the outer wall surface 42 of the stuffing box clamping nut 4, reducing the probability of the locking element 3 slipping in the blind hole 41 and achieving the best positioning effect. In addition, since the connecting block 2 extends along the thickness direction of the handle 1, that is, while the axial direction of the locking element 3 is perpendicular to the surface of the connecting block 2, its axial direction is the same as the length direction of the handle 1. Thus, when the locking element 3 is inserted into the blind hole 41, its axis will be consistent with the axis of the blind hole 41, achieving precise alignment and avoiding excessive friction on one side of the inner wall of the blind hole 41 due to the tilted insertion of the locking element 3. This further reduces the wear of the locking element 3 and the blind hole, and improves the service life of the blind hole 41.

[0034] Furthermore, to further enhance the adaptability of the fastening fixture, multiple mounting ports can be spaced apart along the length of the handle 1 on the clamping section 12, with the connecting block 2 selectively engaging with one of these ports. This allows for the selection of a suitable mounting port based on the dimensions of the stuffing box clamping nut 4, thus enabling the selection of an appropriate torque. Additionally, the dimensions of the contact area between the clamping section 12 and the stuffing box clamping nut 4 can be adjusted according to the thickness of the stuffing box clamping nut 4, ensuring sufficient contact area between the clamping section 12 and the stuffing box clamping nut 4. This not only allows for a more even distribution of force to the stuffing box clamping nut 4, preventing deformation of the nut 4's end due to excessive localized stress and protecting its structural integrity, but also improves the versatility of the fastening fixture.

[0035] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0036] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0037] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A fastening fixture for a stuffing box clamping nut, characterized in that, The fastening fixture includes: The handle includes a gripping section and a clamping section, the clamping section being connected to one end of the gripping section; and A locking part is connected to the clamping section. The end of the locking part is used to extend into the blind hole of the packing box clamping nut. After the end of the locking part extends into the blind hole, the surface of the clamping section near the locking part is used to abut against the end of the packing box clamping nut in the axial direction.

2. The fastening fixture for the packing box clamping nut according to claim 1, characterized in that, In the width direction of the handle, the size of the pressing section is larger than the size of the gripping section.

3. The fastening fixture for the packing box clamping nut according to claim 2, characterized in that, The clamping section includes a connecting plate and a pressure plate. The two ends of the connecting plate are respectively connected to the gripping section and the pressure plate. The pressure plate is used to cooperate with the packing box clamping nut. The connecting plate has a gradually expanding structure, with the size of the connecting plate gradually increasing from the connection point with the gripping section to the connection point with the pressure plate.

4. The fastening fixture for the packing box clamping nut according to claim 1, characterized in that, The locking portion includes: A connecting block, connected to the clamping section, and the connecting block extending along the thickness direction of the handle; and A locking element is connected to the connecting block and spaced apart from the clamping section. The locking element is used to extend into the blind hole of the packing box clamping nut, and the connecting block can abut against the outer wall surface of the packing box clamping nut after the locking element extends into the blind hole.

5. The fastening fixture for the packing box clamping nut according to claim 4, characterized in that, The locking member includes a locking section and a connecting section arranged in a stepped manner. The connecting section cooperates with the connecting block, and the locking section is used to extend into the blind hole.

6. The fastening fixture for the packing box clamping nut according to claim 5, characterized in that, The end of the locking segment is an arc-shaped surface.

7. The fastening fixture for the packing box clamping nut according to claim 4, characterized in that, The axial direction of the locking member is perpendicular to the surface of the connecting block.

8. The fastening fixture for the packing box clamping nut according to claim 4, characterized in that, Along the length of the handle, the clamping section is provided with a plurality of mounting ports at intervals, and the connecting block selectively mates with one of the mounting ports.

9. The fastening fixture for the packing box clamping nut according to claim 1, characterized in that, The handle is a one-piece molded structure.

10. The fastening fixture for the packing box clamping nut according to claim 1, characterized in that, Both the handle and the locking part are made of metal.

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