A type of sealing installation fixture

Abstract

This utility model provides a sealing ring installation fixture, relating to the field of sealing ring installation technology, comprising: a cylindrical outer shell and a pressing shaft; wherein, the cylindrical outer shell has a through shaft hole; the pressing shaft is axially movable and disposed in the shaft hole, and its front end has an annular step; an annular groove for accommodating the sealing ring is formed between the annular step and the front end wall of the shaft hole, and the diameter of the front end of the shaft hole matches the diameter of the inner bore of the valve body; the rear end of the pressing shaft extends out of the cylindrical outer shell so that the sealing ring can be pressed into the inner bore of the valve body under the action of external force. Thus, it has the advantages of easy installation and high installation quality.

Description

Technical Field

[0001] This utility model relates to the field of sealing installation technology, and in particular to a sealing installation fixture. Background Technology

[0002] In existing technology, a plug seal is typically used to seal the rotating shaft of a screw rotary pump from the pump body. The plug seal usually has an interference fit with the pump body's inner bore to ensure sealing performance. However, in actual assembly, the installation of the plug seal still relies on manual pressing. Due to the large size of the plug seal's front end and the interference fit with the pump body's inner bore, deformation or damage is easily caused during installation, resulting in a high rate of plug seal failure.

[0003] Furthermore, manual pressing installation is not only inefficient, but also makes it difficult to control the installation quality. If the seal is damaged or deformed and not detected in time, it may lead to pump body seal failure, resulting in malfunction of the dispensing valve, equipment failure, or leakage.

[0004] Therefore, a pan-sealing installation fixture that is easy to install and has high installation quality needs to be designed. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing installation fixture to address the defects and shortcomings of the existing technology, thereby solving at least one of the above-mentioned technical problems. It has the advantages of easy installation and high installation quality.

[0006] To achieve the above objectives, this utility model provides a sealing installation fixture, comprising: A cylindrical outer shell with a through-hole shaft; An extrusion shaft is axially movable in the shaft hole, and its front end is provided with an annular step; An annular groove for accommodating the plug seal is formed between the annular step and the front end wall of the shaft hole, and the diameter of the front end of the shaft hole matches the diameter of the inner hole of the valve body. The rear end of the extrusion shaft extends outside the cylindrical outer shell so that the plug can be pressed into the valve body's inner bore under external force.

[0007] Optionally, the shaft hole is a stepped hole, and the extrusion shaft is a stepped shaft that mates with it; It also includes an elastic element, which is sleeved on the outer periphery of the extrusion shaft, with one end abutting against the stepped surface of the stepped hole and the other end abutting against the stepped surface of the extrusion shaft.

[0008] Optionally, the elastic element is a compression spring.

[0009] Optionally, the extrusion shaft sleeved on the rear end of the elastic member is further provided with an annular groove, and the shaft hole is provided with a stroke limiting member protruding from the inner wall of the shaft hole to limit the stroke of the extrusion shaft.

[0010] Optionally, the cylindrical outer shell is provided with a plurality of threaded holes in a circumferential array, and the travel limiting member is a nut screw that is threaded to the threaded holes and extends into the shaft hole.

[0011] Optionally, the shaft hole includes, from front to back, a first shaft hole section that matches the diameter of the valve body's inner bore, and a second shaft hole section with a diameter larger than the first shaft hole section; The extrusion shaft comprises, from front to back, a plug seal receiving section, a spring mounting section with a diameter larger than the plug seal receiving section, a first limiting section with a diameter larger than the spring mounting section, a stroke limiting section with a diameter smaller than the first limiting section, and a second limiting section with a diameter equal to the first limiting section. The compression spring is sleeved on the spring mounting section, with one end abutting against the stepped surface formed by the first shaft hole section and the second shaft hole section, and the other end abutting against the stepped surface formed by the spring mounting section and the first limiting section; The travel limit segment, together with the stepped surface formed by the first limit segment and the second limit segment, defines the annular groove.

[0012] Optionally, the front end of the plug seal receiving section of the extrusion shaft is also coaxially provided with a positioning section. The diameter of the positioning section is smaller than the diameter of the plug seal receiving section. It is used to insert into the inner hole of the valve cavity before the plug seal is pressed into the inner hole of the valve body, so as to ensure that the valve body cavity is coaxial with the cylindrical outer shell.

[0013] Optionally, the Pan-Seal mounting fixture further includes a pressure ring separately disposed from the cylindrical housing, the pressure ring being used to press the Pan-Seal into the annular groove.

[0014] Optionally, the rear end of the extrusion shaft is provided with an extension section, the diameter of which is less than or equal to the inner hole of the plug seal, and a barb structure is provided at the end circumferentially for locking the plug seal and pulling it out of the valve body's inner hole when removing the plug seal.

[0015] Optionally, the extension section comprises at least two spaced elastic extension rods arranged circumferentially and capable of radially contracting when inserted into the inner hole of the plug seal, and elastically rebounding to fit against the inner wall of the plug seal after passing through; the ends of the extension rods are provided with the barb structure.

[0016] Compared with the prior art, the advantages of this application are: This plug seal installation fixture uses a cylindrical outer shell with a shaft hole and an axially movable extrusion shaft to pre-position the plug seal using an annular groove. The extrusion shaft then pushes the plug seal into the valve body's inner bore evenly and stably, achieving a reliable interference fit installation. This reduces damage or deformation to the plug seal and improves the ease and quality of installation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the sealing installation fixture and the sealing seal before assembly, according to an embodiment of the present invention. Figure 2 This is another structural diagram of the sealing installation fixture and the sealing seal before assembly, according to an embodiment of this utility model; Figure 3 This is a cross-sectional structural diagram of the assembly of the plug seal installation fixture and the plug seal according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the installation cross-sectional structure of the plug seal according to an embodiment of the present utility model, wherein the plug seal is not pressed into the body hole of the valve body; Figure 5 This is a schematic diagram of the installation cross-sectional structure of the plug seal according to an embodiment of the present utility model, wherein the plug seal has been pressed into the body bore of the valve body; Figure 6 This is a schematic diagram of the installation cross-sectional structure of the plug seal according to an embodiment of the present utility model, wherein the plug seal installation fixture has been removed from the valve body's inner bore; Figure 7 This is a cross-sectional structural diagram of the cylindrical outer shell according to an embodiment of the present utility model; Figure 8 This is a cross-sectional structural diagram of the extrusion shaft of this utility model; Figure 9 This is a schematic diagram of the disassembly cross-sectional structure of the pan-sealed seal according to an embodiment of the present utility model, wherein the barb structure has hooked the pan-sealed seal; Figure 10 This is a schematic diagram of the disassembly cross-sectional structure of the plug seal according to an embodiment of the present invention, wherein the plug seal has been removed from the body hole of the valve body.

[0019] Explanation of reference numerals in the attached figures 100-Pan plug seal installation fixture; 1-Cylindrical outer shell; o1-Shaft hole; o2-Threaded hole; 11-First shaft hole section; 12-Second shaft hole section; 2-Extrusion shaft; a-Annular step; 21-Positioning section; 22-Sealing section; 23-Spring mounting section; 24-First limiting section; 25-Stroke limiting section; 26-Second limiting section; 27-Extension section; 28-Barb structure; 29-Extension rod; b-Annular groove; 3-Compression spring; c-Annular groove; 4-Machine screws; 5-Pressure ring; 200-pan-sealing; 300 - Valve body; 310 - Valve body inner bore; 320 - Valve cavity inner bore. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "back," "side," and "circumferential" used in this utility model indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish multiple components or structures with the same or similar structures and do not indicate any special limitation on the arrangement order or connection relationship.

[0022] Please refer to Figures 1 to 10 This utility model provides a plug seal installation fixture 100 for installing a plug seal 200 into the inner bore 310 of a valve body. The plug seal installation fixture 100 includes a cylindrical outer shell 1 and a compression shaft 2.

[0023] The cylindrical outer shell 1 has a through shaft hole o1. In this embodiment, the cylindrical outer shell 1 is cylindrical for easy gripping. It should be noted that the shape of the cylindrical outer shell 1 is not limited to a cylindrical shape, and can also be designed as a square cylinder, hexagonal cylinder, elliptical cylinder, or other cylindrical structures suitable for processing and assembly, to achieve the same installation function.

[0024] The extrusion shaft 2 is axially movable within the shaft hole o1, and its front end has an annular step a. It should be noted that in this embodiment, the front end refers to the end of the cylindrical outer shell 1 closest to the valve body 300 during the installation of the plug seal 200, and the distal end refers to the end of the cylindrical outer shell 1 furthest from the valve body 300. An annular groove b is formed between the annular step a and the front wall of the shaft hole o1 to accommodate the plug seal 200. The diameter of the front end of the shaft hole o1 matches the diameter of the inner bore 310 of the valve body. That is, the diameter of the front end of the shaft hole o1 is the same as the diameter of the inner bore 310 of the valve body. Specifically, before installation, the plug seal 200 can be pre-positioned within the annular groove b, placing it in a pre-installation position.

[0025] The rear end of the extrusion shaft 2 extends out of the cylindrical outer shell 1 so that the plug seal 200 can be pressed into the inner bore 310 of the valve body under the action of external force. That is, after the extrusion shaft 2 is aligned with the inner bore 310 of the valve body, the extrusion shaft 2 is pushed forward along the axial direction by the action of external force on the rear end of the extrusion shaft 2, and the plug seal 200 can be pressed into the inner bore 310 of the valve body under the push of the annular step a.

[0026] The plug seal installation fixture 100 is provided with a cylindrical outer shell 1 with a shaft hole o1 and an axially movable extrusion shaft 2. The plug seal 200 is pre-positioned using an annular groove b and pushed evenly and stably into the valve body inner hole 310 by the annular step a of the extrusion shaft 2, thereby achieving reliable interference fit installation, reducing damage or deformation of the plug seal 200, and improving the convenience and quality of installation.

[0027] To reduce the direct impact on the seal 200 during installation and to facilitate the removal of the extrusion shaft 2 after installation, optionally, please refer to... Figures 4 to 8 In this embodiment, the shaft hole o1 of the cylindrical outer shell 1 is a stepped hole, and the extrusion shaft 2 is a stepped shaft that mates with it. The sealing fixture 100 also includes an elastic element. The elastic element is sleeved on the outer periphery of the extrusion shaft 2, with one end abutting against the stepped surface of the stepped hole and the other end abutting against the stepped surface of the extrusion shaft 2. When an external force pushes the extrusion shaft 2 forward, the elastic element is compressed; when the external force is released, the elastic element releases its restoring force, pushing the extrusion shaft 2 back, achieving automatic reset, thereby improving the ease of operation and reducing the risk of damage to the sealing seal 200. Optionally, the elastic element is a compression spring 3. Of course, in other embodiments, the elastic element can also be an elastic rubber ring or a silicone sleeve, and no specific limitation is made here.

[0028] To avoid deformation and damage to the Pan-Seal 200 due to excessive force during installation, optionally, please refer to... Figure 8In this embodiment, the rear end of the extrusion shaft 2, which is fitted with the elastic element, is also provided with an annular groove c, and the shaft hole o1 is correspondingly provided with a stroke limiting element protruding from the inner wall of the shaft hole o1, which is used to limit the stroke of the extrusion shaft 2. In this way, the stroke of the extrusion shaft 2 can be effectively limited, preventing damage to the plug seal 200 due to excessive pushing.

[0029] Alternatively, please refer to Figure 1 , Figure 4 and Figure 5 In this embodiment, the cylindrical outer shell 1 has a plurality of threaded holes o2 arranged in a circumferential array. The stroke limiting component is a grommet 4 threaded into the threaded hole o2 and extending into the shaft hole o1. The grommet 4 extending into the shaft hole o1 and its corresponding annular groove c cooperate to limit the stroke of the extrusion shaft 2. In addition, the grommet 4, as a stroke limiting component, enables convenient and reliable installation and disassembly, improving the assembly and maintenance efficiency of the structure. Of course, in other embodiments, the stroke limiting component can also be a limiting pin inserted into the shaft hole o1; here, no specific limitation is made.

[0030] Alternatively, please refer to Figure 7 and Figure 8 In this embodiment, the shaft hole o1 of the cylindrical outer shell 1 includes, from front to back, a first shaft hole section 11 and a second shaft hole section 12. The diameter of the first shaft hole section 11 matches the diameter of the inner hole 310 of the valve body; the diameter of the second shaft hole section 12 is larger than the diameter of the first shaft hole section 11.

[0031] The extrusion shaft 2 comprises, from front to back: a seal-receiving section 22, a spring mounting section 23, a first limiting section 24, a stroke limiting section 25, and a second limiting section 26. The seal-receiving section 22 forms the inner wall of the annular groove b that accommodates the seal 200. The diameter of the spring mounting section 23 is larger than the diameter of the seal-receiving section 22; the diameter of the first limiting section 24 is larger than the diameter of the spring mounting section 23; the diameter of the stroke limiting section 25 is smaller than the diameter of the first limiting section 24; and the diameter of the second limiting section 26 is approximately the same as the diameter of the first limiting section 24.

[0032] The sealing section 22 is the inner wall of the annular groove b that forms the sealing section 200.

[0033] The compression spring 3 is sleeved on the spring mounting section 23 of the extrusion shaft 2, with one end abutting against the stepped surface formed by the first shaft hole section 11 and the second shaft hole section 12, and the other end abutting against the stepped surface formed by the spring mounting section 23 and the first limiting section 24.

[0034] The stepped surface formed by the stroke limiting segment 25, the first limiting segment 24, and the second limiting segment 26 together defines the annular groove c. In this way, the annular groove b, the mounting position of the elastic element, and the controllable advance stroke of the extrusion shaft 2 can be formed by the shaft hole o1 of the cylindrical shell 1 and the extrusion shaft 2.

[0035] Alternatively, please refer to Figure 1 and Figure 4 In this embodiment, the front end of the sealing receiving section 22 of the extrusion shaft 2 is also coaxially provided with a positioning section 21. The diameter of the positioning section 21 is smaller than the diameter of the sealing receiving section 22. It is used to insert the sealing seal 200 into the inner hole 320 of the valve cavity before it is pressed into the inner hole 310 of the valve body, so as to ensure that the valve body cavity and the cylindrical outer shell 1 are coaxial. Through the guidance of the positioning section 21, it can be ensured that the valve body cavity and the cylindrical outer shell 1 remain coaxial, thereby improving the accuracy and stability of the sealing seal 200 fitting into the inner hole 310 of the valve body.

[0036] Alternatively, please refer to Figures 1 to 3 In this embodiment, the sealing ring 100 further includes a pressure ring 5. The pressure ring 5 is separately disposed from the cylindrical outer shell 1 and is used to press the sealing ring 200 into the annular groove b. When installing the sealing ring 200, uniform pressure can be applied to the sealing ring 200 through the pressure ring 5 to press the sealing ring 200 into the annular groove b formed between the front end of the cylindrical outer shell 1 and the annular step a of the extrusion shaft 2.

[0037] To facilitate the removal of the plug seal 200 from the valve body bore 310, optionally, please refer to... Figure 1 , Figures 8 to 10 In this embodiment, the rear end of the extrusion shaft 2 is provided with an extension section 27. The diameter of the extension section 27 is less than or equal to the inner hole of the plug seal 200, so that it can be smoothly inserted into the plug seal 200 when it is removed. The end of the extension section 27 is provided with a barb structure 28 in the circumferential direction, which is used to hold the plug seal 200 and pull it out of the valve body inner hole 310 when it is removed. In this way, the plug seal 200 can be easily removed from the valve body inner hole 310.

[0038] To address the issues of difficulty in removing, easy damage, and unstable gripping of the Pan-Seal 200, alternatively, please refer to... Figure 1 and Figure 8 In this embodiment, the extension section 27 consists of two spaced-apart elastic extension rods 29. The extension rods 29 are arranged circumferentially and can radially contract when inserted into the inner hole of the seal 200, and elastically rebound to fit against the inner wall of the seal 200 after passing through. The ends of the extension rods 29 are provided with barb structures 28. Specifically, in this embodiment, the cross-section of the elastic extension rods 29 is arc-shaped, the two elastic extension rods 29 have a gap between them, and the outer peripheral wall of the elastic extension rods 29 elastically rebounds to fit against the inner wall of the seal 200 after passing through. Of course, in other embodiments, the extension section 27 may also consist of three, four, or more spaced-apart elastic extension rods 29; no specific limitation is made here.

[0039] The working process and principle / assembly steps of this utility model embodiment are roughly as follows: Installation process of Pan-Seal 200: First, the sealing cap 200 is placed on the front end of the extrusion shaft 2, and the sealing cap 200 is pushed into the annular groove b formed by the cylindrical shell 1 and the extrusion shaft 2 by the pressure ring 5. Next, the positioning section 21 is used to achieve coaxial alignment between the valve body cavity and the cylindrical outer shell 1; Then, the extrusion shaft 2 is pushed forward along the axial direction of the shaft hole o1 from the rear end of the extrusion shaft 2, and the plug seal 200 can be stably pushed into the valve body hole 310 under the thrust of the annular step a to achieve installation. Next, release the thrust, and the extrusion shaft 2 will retract under the action of the elastic element, allowing the sealing fixture 100 to be removed and the sealing 200 to be installed.

[0040] Disassembly process of Pan-Seal 200: The barb structure 28 of the extension 27 of the sealing fixture 100 is inserted into the inner hole of the sealing seal 200 in the inner hole of the valve body 310 and the sealing seal 200 is locked in place.

[0041] Gently pull it out, and the Pan-Seal 200 can be removed without damage.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A sealing installation fixture, characterized in that, include: A cylindrical outer shell with a through-hole shaft; An extrusion shaft is axially movable in the shaft hole, and its front end is provided with an annular step; An annular groove for accommodating the plug seal is formed between the annular step and the front end wall of the shaft hole, and the diameter of the front end of the shaft hole matches the diameter of the inner hole of the valve body. The rear end of the extrusion shaft extends outside the cylindrical outer shell so that the plug can be pressed into the valve body's inner bore under external force.

2. The sealing installation fixture as described in claim 1, characterized in that, The shaft hole is a stepped hole, and the extrusion shaft is a stepped shaft that mates with it; It also includes an elastic element, which is sleeved on the outer periphery of the extrusion shaft, with one end abutting against the stepped surface of the stepped hole and the other end abutting against the stepped surface of the extrusion shaft.

3. The sealing installation fixture as described in claim 2, characterized in that, The elastic element is a compression spring.

4. The sealing installation fixture as described in claim 3, characterized in that, The extrusion shaft is sleeved on the rear end of the elastic member and is provided with an annular groove. The shaft hole is provided with a stroke limiting member protruding from the inner wall of the shaft hole to limit the stroke of the extrusion shaft.

5. The sealing installation fixture as described in claim 4, characterized in that, The cylindrical outer shell is provided with a plurality of threaded holes in a circumferential array, and the travel limiting member is a nut screw that is threaded to the threaded holes and extends into the shaft hole.

6. The sealing installation fixture as described in claim 5, characterized in that, The shaft hole, from front to back, includes a first shaft hole section that matches the diameter of the valve body's inner bore, and a second shaft hole section with a diameter larger than the first shaft hole section. The extrusion shaft comprises, from front to back, a plug seal receiving section, a spring mounting section with a diameter larger than the plug seal receiving section, a first limiting section with a diameter larger than the spring mounting section, a stroke limiting section with a diameter smaller than the first limiting section, and a second limiting section with a diameter equal to the first limiting section. The compression spring is sleeved on the spring mounting section, with one end abutting against the stepped surface formed by the first shaft hole section and the second shaft hole section, and the other end abutting against the stepped surface formed by the spring mounting section and the first limiting section; The travel limit segment, together with the stepped surface formed by the first limit segment and the second limit segment, defines the annular groove.

7. The sealing installation fixture as described in claim 6, characterized in that, The front end of the sealing section of the extrusion shaft is also coaxially provided with a positioning section. The diameter of the positioning section is smaller than the diameter of the sealing section. It is used to insert the sealing section into the inner hole of the valve cavity before the sealing section is pressed into the inner hole of the valve body, so as to ensure that the valve body cavity is coaxial with the cylindrical outer shell.

8. The sealing installation fixture as described in claim 7, characterized in that, It also includes a pressure ring that is separately disposed from the cylindrical outer shell, the pressure ring being used to press the plug seal into the annular groove.

9. The sealing fixture as described in any one of claims 1-8, characterized in that, The rear end of the extrusion shaft is provided with an extension section, the diameter of which is less than or equal to the inner hole of the plug seal, and a barb structure is provided at the end circumferentially for locking the plug seal and pulling it out of the valve body's inner hole when removing the plug seal.

10. The sealing installation fixture as described in claim 9, characterized in that, The extension section consists of at least two spaced elastic extension rods arranged circumferentially and retracting radially when inserted into the inner hole of the plug seal, and elastically rebounding to fit against the inner wall of the plug seal after passing through; the ends of the extension rods are provided with the barb structure.

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