Polytrifluorochloroethylene valve seat assembling device

Abstract

The utility model discloses a polytrifluorochloroethylene valve seat assembling device which comprises an assembling cylinder, a center assembling rod and a positioning base, and the diameter of the upper end of the center assembling rod is larger than the diameter of a polytrifluorochloroethylene valve seat and smaller than the diameter of the lower end of the center assembling rod. The central assembly rod is detachably arranged in the assembly cylinder, and when the central assembly rod is fixed, the assembly cylinder can relatively slide along the central assembly rod; the assembling object is placed in the positioning base, after the center assembling rod is assembled in the assembling cylinder, the center assembling rod and the assembling cylinder are located above the assembling object, the center axis of the center assembling rod and the center axis of the assembling object coincide with each other, and the polytrifluorochloroethylene valve seat is connected to the center assembling rod in a sleeving mode. In the downward moving process of the assembly cylinder, the lower end of the center assembly rod makes contact with an assembly object and is in a static state, and therefore the polytrifluorochloroethylene valve seat connected to the center assembly rod in a sleeving mode is installed in a sealing groove in the assembly object in a pressing mode through the downward moving assembly cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical assembly, in particular to a polytrifluorochloroethylene valve seat assembly device. Background Art

[0002] Polychlorotrifluoroethylene valve seat, namely PCTFE valve seat, is a special sealing part suitable for installation in various mechanical structures. It has excellent corrosion resistance, high pressure resistance and wear resistance. Its low temperature resistance is outstanding and it can be used for a long time at -196-125℃. It can be used for static sealing and dynamic sealing conditions. Due to its suitability for special working conditions, simple manufacturing and reliable functions, it is widely used in aviation, medicine, oil and gas and other fields.

[0003] like Figure 1 and Figure 2 As shown, an existing polytrifluorochloroethylene valve seat 1 is an annular object with a certain elasticity, similar to a sealing ring. When the polytrifluorochloroethylene valve seat 1 is assembled, the polytrifluorochloroethylene valve seat 1 needs to be inserted into the sealing groove 211 of the assembly 2, but the polytrifluorochloroethylene valve seat 1 is relatively hard and the polytrifluorochloroethylene valve seat 1 and the assembly 2 are relatively small. In addition, since the diameter of the polytrifluorochloroethylene valve seat 1 is smaller than the diameter of the sealing groove 211 of the assembly, it is generally necessary to use a tool to expand the polytrifluorochloroethylene valve seat 1 to deform it and enlarge it, and then insert the polytrifluorochloroethylene valve seat 1, and then loosen the polytrifluorochloroethylene valve seat 1. Under the action of the restoring force of the polytrifluorochloroethylene valve seat 1, it will shrink and tighten into the sealing groove 211 of the assembly to complete the assembly. However, the existing tooling has a complex structure and a slow assembly speed, which not only reduces the assembly efficiency, but also increases the labor intensity of the operators, and is not suitable for mass production.

[0004] After searching, no patent documents identical or similar to the present application have been found.

[0005] In summary, how to design a polytrifluoroethylene valve seat assembly device with a simple structure and capable of assembling the polytrifluoroethylene valve seat into the sealing groove of the assembly object conveniently and quickly, thereby improving the assembly speed and efficiency, reducing the labor intensity of the operators, and being suitable for mass production is a major problem that needs to be solved urgently. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology and provide a polytrifluorochloroethylene valve seat assembly device, which has a simple structure and can conveniently and quickly assemble the polytrifluorochloroethylene valve seat into the sealing groove of the assembly object, thereby improving the assembly speed and efficiency, reducing the labor intensity of workers, and is suitable for mass production.

[0007] To achieve the above object, the technical scheme of the utility model is as follows: a polytrifluorochloroethylene valve seat assembly device, comprising an assembly cylinder, a central assembly rod and a positioning base, wherein the upper end diameter of the central assembly rod is smaller than the lower end diameter of the central assembly rod and the upper end diameter of the central assembly rod is less than the diameter of the polytrifluorochloroethylene valve seat and the lower end diameter of the central assembly rod, the central assembly rod can be detachably arranged in the assembly cylinder and when the central assembly rod is fixed, the assembly cylinder can slide relatively along the central assembly rod; the assembly object is placed in the positioning base, and after the central assembly rod is assembled into the assembly cylinder, the central assembly rod and the assembly cylinder are located above the assembly object and the central axis of the central assembly rod coincides with the central axis of the assembly object, and the polytrifluorochloroethylene valve seat is sleeved on the central assembly rod; in the process of the assembly cylinder moving downward, the lower end of the central assembly rod contacts the assembly object and is in a stationary state, so that the polytrifluorochloroethylene valve seat sleeved on the central assembly rod is pressed into the sealing groove on the assembly object by using the assembly cylinder moving downward.

[0008] Preferably, at least two pin holes are provided in the assembly cylinder, each of which is communicated with the inner cavity of the assembly cylinder, and a spring bayonet mechanism is provided in each pin hole, and the bayonet of the spring bayonet mechanism can extend into the inner cavity of the assembly cylinder and can also retract from the inner cavity of the assembly cylinder into the pin hole; a bayonet groove matching the bayonet is provided on the central assembly rod near the upper end of the central assembly rod.

[0009] Preferably, the clamping groove is horizontally arranged on the outer peripheral surface of the central assembly rod and is arranged in a full circle around the circumference of the central assembly rod.

[0010] Preferably, the spring bayonet mechanism also includes an adjusting force screw and a spring, the pin hole is a step-shaped hole, including a large hole and a small hole connected to the large hole, the small hole is connected to the inner cavity of the assembly cylinder, and a step portion is formed at the connection between the large hole and the small hole; the bayonet includes a pin body and a pin body flange arranged on one end of the pin body, the pin body of the bayonet is located in the small hole, the pin body flange of the bayonet, the spring and the adjusting force screw are all located in the large hole, and the pin body flange of the bayonet is in contact with the adjusting force screw through the spring.

[0011] Preferably, the central assembly rod includes a straight rod portion located on one side of the upper end and a rod portion located on one side of the lower end.

[0012] Preferably, a positioning groove is provided on the end surface of the lower end of the central assembly rod.

[0013] Preferably, the inner cavity of the assembly cylinder includes a straight hole cavity located at one side of the upper end and a tapered hole cavity located at one side of the lower end.

[0014] The beneficial effects of the utility model are as follows: the utility model has a simple structure and, through structural design, ingeniously utilizes the matching structure between the assembly cylinder, the central assembly rod and the positioning base, so that the polytrifluorochloroethylene valve seat can be conveniently and quickly assembled into the sealing groove of the assembly object, thereby improving the assembly speed and efficiency, reducing the labor intensity of workers, and being suitable for mass production. By arranging a spring bayonet mechanism on the assembly cylinder to cooperate with the bayonet groove of the central assembly rod, both the disassembly and assembly between the central assembly rod and the assembly cylinder can be realized, and the automatic assembly of the polytrifluorochloroethylene valve seat can be realized, further improving the assembly speed and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the axial cross-sectional structure before the polytrifluorochloroethylene valve seat is assembled into the sealing groove of the assembly in the prior art;

[0016] Figure 2 It is a schematic diagram of the axial cross-sectional structure after the polytrifluorochloroethylene valve seat is assembled into the sealing groove of the assembly in the prior art;

[0017] Figure 3 The axial cross-sectional structure diagram of the utility model during assembly is shown in FIG. Figure 1 ;

[0018] Figure 4 This is a schematic diagram of the axial cross-sectional structure of the central assembly rod in the embodiment of the utility model;

[0019] Figure 5 The axial cross-sectional structure diagram of the utility model during assembly is shown in FIG. Figure 2 ;

[0020] Figure 6 The axial cross-sectional structure diagram of the utility model during assembly is shown in FIG. Figure 3 ;

[0021] Figure 7 The axial cross-sectional structure diagram of the utility model during assembly is shown in FIG. Figure 4 ;

[0022] Figure 8 It is a schematic diagram of the axial cross-sectional structure of the assembly cylinder in the embodiment of the utility model;

[0023] Fig. 9 It is a schematic axial cross-sectional view of the structure after the bayonet of the spring bayonet mechanism of the assembly cylinder in the embodiment of the utility model is inserted into the bayonet groove of the central assembly rod;

[0024] Fig.10 It is a schematic axial cross-sectional view of the structure after the bayonet of the spring bayonet mechanism of the assembly cylinder in the embodiment of the utility model is disengaged from the bayonet groove of the central assembly rod;

[0025] Fig.11 for Figure 8 A schematic diagram of the enlarged structure of the middle part A;

[0026] In the figure: 1. polytrifluorochloroethylene valve seat, 2. assembly, 211. sealing groove, 212. top surface of assembly, 213. axial boss, 3. assembly cylinder, 311. pin hole, 3111. large hole, 3112. small hole, 312. inner cavity of assembly cylinder, 3121. straight hole cavity, 3122. tapered hole cavity, 4. center assembly rod, 411. slot, 412. positioning groove, 5. positioning base, 511. positioning hole, 6. spring bayonet mechanism, 611. bayonet, 612. regulating force screw, 613. spring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the following will be combined with the appended drawings of the embodiment of the utility model. Figure 1-11 , the technical scheme of the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model. Example

[0028] like Figure 3As shown: a polytrifluorochloroethylene valve seat assembly device, comprising an assembly cylinder 3, a central assembly rod 4 and a positioning base 5, wherein the assembly cylinder 3 is fixedly arranged on a press head (not shown in the figure), the upper end diameter of the central assembly rod 4 is smaller than the lower end diameter of the central assembly rod 4, the diameter of the polytrifluorochloroethylene valve seat 1 is between the upper end diameter and the lower end diameter of the central assembly rod 4, that is, the upper end diameter of the central assembly rod 4 is less than the diameter of the polytrifluorochloroethylene valve seat 1 and the lower end diameter of the central assembly rod 4, the central assembly rod 4 can be detachably arranged in the assembly cylinder 3 and when the central assembly rod 4 is fixed, the assembly cylinder 3 can be moved along the The central assembly rod 4 slides relatively; the assembly object 2 is placed in the positioning hole 511 of the positioning base 5. After the central assembly rod 4 is assembled into the assembly cylinder 3, the central assembly rod 4 and the assembly cylinder 3 are located above the assembly object 2 and the central axis of the central assembly rod 4 coincides with the central axis of the assembly object 2. The polytrifluorochloroethylene valve seat 1 is sleeved on the central assembly rod 4; during the downward movement of the assembly cylinder 3, the lower end of the central assembly rod 4 is in contact with the assembly object 2 and is in a stationary state, so that the polytrifluorochloroethylene valve seat 1 sleeved on the central assembly rod 4 is pressed into the sealing groove 211 on the assembly object 2 by using the downwardly moved assembly cylinder 3 to complete the assembly work. The positioning base 5 is a circular structure, and the positioning base further improves the stability of the assembly device. By setting the positioning base, the polytrifluorochloroethylene valve seat can be conveniently and quickly assembled into the sealing groove of the assembly object.

[0029] like Figure 4 As shown, in this embodiment, before assembly, the central assembly rod 4 needs to be removed from the assembly cylinder 3, and the polytrifluoroethylene valve seat 1 is inserted from the upper end of the central assembly rod 4 to the central assembly rod 4. Since the upper end diameter of the central assembly rod 4 is less than the diameter of the polytrifluoroethylene valve seat 1 and less than the lower end diameter of the central assembly rod 4, when the polytrifluoroethylene valve seat 1 is inserted from the upper end of the central assembly rod 4, the polytrifluoroethylene valve seat 1 will stay at a position between the upper end and the lower end of the central assembly rod 4 and will not move. Figure 3 As shown, after the polytrifluoroethylene valve seat 1 is inserted, the upper end of the central assembly rod 4 is inserted into the cavity of the assembly cylinder 3 to assemble, and then the press is started to drive the assembly cylinder 3 and the central assembly rod 4 to move downward together. Figure 5 As shown, when the lower end of the central assembly rod 4 contacts the assembly object 2, the central assembly rod 4 is blocked by the assembly object 2 and remains stationary, and no longer moves downward. Figure 6 and Figure 7As shown, at this time, since the assembly cylinder 3 can slide relatively along the central assembly rod 4, the assembly cylinder 3 can continue to move downward under the drive of the press head (not shown in the figure), and the assembly cylinder 3 is in contact with the polytrifluorochloroethylene valve seat 1, driving the polytrifluorochloroethylene valve seat 1 sleeved on the central assembly rod 4 to move downward along the central assembly rod 4. Since the diameter of the polytrifluorochloroethylene valve seat 1 is less than the lower end diameter of the central assembly rod 4, the polytrifluorochloroethylene valve seat 1 is automatically expanded by the lower end of the central assembly rod 4 during the downward movement of the polytrifluorochloroethylene valve seat 1, and finally the polytrifluorochloroethylene valve seat 1 is moved from the central assembly rod 4 to the sealing groove 211 of the assembly 2, so that the polytrifluorochloroethylene valve seat 1 is clamped into the sealing groove 211 of the assembly, and the assembly is completed. The structure of this embodiment is simple and, through structural design, the matching structure between the assembly cylinder, the central assembly rod and the positioning base is cleverly utilized, so that the polytrifluorochloroethylene valve seat can be conveniently and quickly assembled into the sealing groove of the assembly object, thereby improving the assembly speed and efficiency, reducing the labor intensity of workers, and being suitable for mass production.

[0030] like Figure 8 As shown, at least two pin holes 311 are provided in the assembly cylinder 3. The two pin holes 311 are preferably arranged relative to the central axis of the assembly cylinder 3. Each pin hole 311 is connected to the inner cavity 312 of the assembly cylinder. A spring latch mechanism 6 is provided in each pin hole 311. The latch 611 of the spring latch mechanism 6 can extend into the inner cavity 312 of the assembly cylinder and can also be retracted from the inner cavity 312 of the assembly cylinder to the pin hole 311. Figure 4 As shown, a slot 411 cooperating with the bayonet 611 is provided on the central assembly rod 4 near the upper end of the central assembly rod 4. Fig. 9 As shown, the disassembly relationship between the central assembly rod 4 and the assembly cylinder 3 is as follows: when assembling, after the upper end of the central assembly rod 4 is inserted into the inner cavity 312 of the assembly cylinder, the bayonet 611 of the spring bayonet mechanism 6 extends into the bayonet groove 411 on the central assembly rod 4, so that the central assembly rod 4 and the assembly cylinder 3 are connected together. When disassembling, just pull the central assembly rod 4 out from the bottom of the assembly cylinder 3.

[0031] like Fig.10As shown, during the working process, the press head drives the center assembly rod 4 and the assembly cylinder 3 to move downward together. When the lower end of the center assembly rod 4 contacts the assembly object and is blocked, the spring latch mechanism 6 is subjected to the force of the center assembly rod 4, and the latch 611 retracts from the latch groove 411 of the center assembly rod 4, so that the assembly cylinder 3 can continue to move downward, and the polytrifluoroethylene valve seat 1 sleeved on the center assembly rod 4 is moved from the center assembly rod 4 to the sealing groove of the assembly object. When the assembly is completed, since the center assembly rod 4 has a certain weight, the press head can drive the assembly cylinder 3 to move upward relative to the center assembly rod 4. When it moves to the latch groove 411 of the center assembly rod 4, the latch 611 of the spring latch mechanism 6 extends into the latch groove 411 of the center assembly rod 4 under the action of the restoring force of the elastic force, thereby driving the center assembly rod 4 to move upward together and return to the initial state (as shown in FIG. 1 ). Fig. 9 Therefore, in this embodiment, by arranging the spring bayonet mechanism on the assembly cylinder to cooperate with the bayonet groove of the central assembly rod, it is possible to realize the disassembly and assembly between the central assembly rod and the assembly cylinder, and also to realize the automatic assembly of the polytrifluorochloroethylene valve seat, thereby further improving the assembly speed and efficiency.

[0032] like Figure 4 As shown, the clamping groove 411 is horizontally arranged on the outer circumference of the central assembly rod 4 and is arranged in a full circle around the circumference of the central assembly rod 4. In this way, after the central assembly rod is inserted into the inner cavity of the assembly cylinder at will, the clamping pin of the spring clamping mechanism can be inserted into the clamping groove on the central assembly rod, without the need to align the position of the clamping pin before inserting the central assembly rod, which is convenient and quick.

[0033] like Fig.11 As shown, the spring bayonet mechanism 6 also includes a regulating force screw 612 and a spring 613, and the spring 613 can be a compression spring. The pin hole 311 is a stepped hole, including a large hole 3111 and a small hole 3112 connected to the large hole 3111, the small hole 3112 is connected to the inner cavity 312 of the assembly cylinder, and a step portion is formed at the connection between the large hole 3111 and the small hole 3112. The bayonet 611 includes a pin body 6111 and a pin body flange 6112 arranged on one end of the pin body 6111. After installation, the pin body 6111 of the bayonet 611 is located in the small hole 3112, the pin body flange 6112 of the bayonet 611, the spring 613 and the regulating force screw 612 are all located in the large hole 3111, and the pin body flange 6112 of the bayonet 611 is in contact with the regulating force screw 612 through the spring 613. When the pin body 6111 of the bayonet pin 611 moves along the small hole 3112, an axial limit structure is formed by the contact between the pin body flange 6112 of the bayonet pin 611 and the step portion of the pin hole 311. The regulating force screw 612 is threadedly connected in the large hole 3111, and the magnitude of the elastic force can be adjusted by the regulating force screw 612.

[0034] like Figure 1 As shown, the assembly 2 is columnar, and the sealing groove 211 is provided on the outer circumference of the assembly 2 near the top surface 212 of the assembly. The sealing groove 211 is provided in a full circle along the circumference of the assembly 2, and an axial protrusion 213 is also provided at the center position on the top surface 212 of the assembly. Figure 4 and Figure 6 As shown, correspondingly, a positioning groove 412 is provided on the end face of the lower end of the center assembly rod 4, and the size of the positioning groove 412 matches the axial boss 213 of the assembly object 2. When the end face of the lower end of the center assembly rod 4 contacts the top surface 212 of the assembly object, the axial boss 212 is inserted into the positioning groove 412 for positioning.

[0035] like Figure 4 As shown, the central assembly rod 4 includes a straight rod portion 413 located at one side of the upper end and a tapered rod portion 414 located at one side of the lower end. By adjusting the position of the contact between the straight rod portion 413 and the tapered rod portion 414, the position of the polytrifluorochloroethylene valve seat sleeve on the central assembly rod can be adjusted.

[0036] like Figure 1 , Figure 4 and Figure 6 As shown, the diameter D of the lower end face of the central assembly rod 4 matches the diameter d of the top face 212 of the assembly, so that when the lower end face of the central assembly rod 4 contacts the top face 212 of the assembly, it is convenient for the polytrifluorochloroethylene valve seat 1 to move into the sealing groove 211 of the assembly.

[0037] like Figure 7 , Figure 8 and Fig.10 As shown, the inner cavity 312 of the assembly cylinder includes a straight hole cavity 3121 located at one side of the upper end and a tapered hole cavity 3122 located at one side of the lower end. The tapered hole cavity 3122 has the first function of accommodating the top of the assembly object 2 when the assembly cylinder 3 moves down to its position, and the second function of using the contact between the upper end of the tapered hole cavity 3122 and the lower end of the straight hole cavity 3121 to push the polytrifluorochloroethylene valve seat 1 downward along the central assembly rod 4 to complete the assembly work.

[0038] In summary, the utility model has a simple structure and, through structural design, ingeniously utilizes the matching structure between the assembly cylinder, the central assembly rod and the positioning base, so that the polytrifluorochloroethylene valve seat can be conveniently and quickly assembled into the sealing groove of the assembly object, thereby improving the assembly speed and efficiency, reducing the labor intensity of workers, and being suitable for mass production. By arranging a spring bayonet mechanism on the assembly cylinder to cooperate with the bayonet groove of the central assembly rod, both the disassembly and assembly between the central assembly rod and the assembly cylinder can be realized, and the automatic assembly of the polytrifluorochloroethylene valve seat can be realized, further improving the assembly speed and efficiency.

[0039] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0040] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A polytrifluorochloroethylene valve seat assembly device, characterized in that: The utility model comprises an assembly cylinder, a central assembly rod and a positioning base, wherein the upper end diameter of the central assembly rod is smaller than the diameter of the polytrifluorochloroethylene valve seat and smaller than the lower end diameter of the central assembly rod, the central assembly rod can be detachably arranged in the assembly cylinder and when the central assembly rod is fixed, the assembly cylinder can slide relatively along the central assembly rod; the assembly object is placed in the positioning base, and after the central assembly rod is assembled into the assembly cylinder, the central assembly rod and the assembly cylinder are located above the assembly object and the central axis of the central assembly rod coincides with the central axis of the assembly object, and the polytrifluorochloroethylene valve seat is sleeved on the central assembly rod; in the process of the assembly cylinder moving downward, the lower end of the central assembly rod contacts the assembly object and is in a stationary state, so that the polytrifluorochloroethylene valve seat sleeved on the central assembly rod is pressed into the sealing groove on the assembly object by using the assembly cylinder moving downward.

2. The polytrifluorochloroethylene valve seat assembly device according to claim 1, characterized in that: At least two pin holes are arranged in the assembly cylinder, each of which is connected to the inner cavity of the assembly cylinder, and a spring bayonet mechanism is arranged in each pin hole. The bayonet of the spring bayonet mechanism can extend into the inner cavity of the assembly cylinder and can also be retracted from the inner cavity of the assembly cylinder to the pin hole; a bayonet groove matching the bayonet is arranged on the central assembly rod near the upper end of the central assembly rod.

3. The polytrifluorochloroethylene valve seat assembly device according to claim 2, characterized in that: The clamping groove is horizontally arranged on the outer peripheral surface of the central assembly rod and is arranged in a full circle around the circumference of the central assembly rod.

4. The polytrifluorochloroethylene valve seat assembly device according to claim 2, characterized in that: The spring bayonet mechanism also includes a regulating force screw and a spring. The pin hole is a step-shaped hole, including a large hole and a small hole connected to the large hole. The small hole is connected to the inner cavity of the assembly cylinder, and a step portion is formed at the connection between the large hole and the small hole. The bayonet includes a pin body and a pin body flange arranged on one end of the pin body. The pin body of the bayonet is located in the small hole, and the pin body flange of the bayonet, the spring and the regulating force screw are all located in the large hole. The pin body flange of the bayonet is in contact with the regulating force screw through the spring.

5. The polytrifluorochloroethylene valve seat assembly device according to any one of claims 1 to 4, characterized in that: The central assembly rod comprises a straight rod portion located at one side of the upper end and a rod portion located at one side of the lower end.

6. The polytrifluorochloroethylene valve seat assembly device according to claim 5, characterized in that: A positioning groove is arranged on the end surface of the lower end of the central assembly rod.

7. The polytrifluorochloroethylene valve seat assembly device according to any one of claims 1 to 4, characterized in that: The inner cavity of the assembly cylinder comprises a straight hole cavity located at one side of the upper end and a tapered hole cavity located at one side of the lower end.

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