Grease injection adapter device with check valve

Abstract

The utility model discloses a grease injection crossover coupling device with a check valve, which comprises a grease injection crossover coupling device body matched with a ball valve grease injection hole, the ball valve grease injection hole is provided with a first thread groove, the grease injection crossover coupling device body comprises a threaded joint matched with the first thread groove, the top of the threaded joint is provided with a channel, and the top of the threaded joint is provided with a second thread groove. The top of the threaded connector is fixedly connected with a vertical pipe. By arranging a series of structures, the outer side of the grease injection gun head can be stably attached and sealed when the grease injection gun head is inserted, so that the phenomenon that sealing grease leaks upwards or is sprayed out can be avoided during grease injection, the grease injection stability is improved, the grease injection gun head can be conveniently clamped, limited and prevented from falling off from the two sides to the middle synchronously, and the service life of the grease injection gun head is prolonged. The device is simple in structure, is not influenced by the upper structure and the thickness of the gun head, is convenient to fix and limit various grease injection gun heads, improves the applicability, and is convenient to automatically unseal when sealing grease is injected and automatically seal to prevent backflow after the sealing grease is injected.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a grease injection conversion joint device with a check valve. Background Art

[0002] A ball valve is a commonly used valve in natural gas pipelines. In the prior art, the valve adopts a triangular ring valve seat structure with better sealing performance. At the same time, in order to make the left and right bodies compatible in the "double-block and double-blow" DIB and "double-block and double-blow" DBB structures, the valve seat portion is much longer than the conventional "polytetrafluoroethylene" PTFE type sealing valve seat, so that the sealing grease injection device cannot be injected from the middle flange, and when injecting the sealing grease, the sealing grease is sprayed outward from the injection port at the same time, resulting in waste and poor injection effect. At this time, the wall thickness of the injection point on the left and right bodies is not enough to meet the needs of both a check valve and a grease injection valve. Such a structure cannot meet user requirements and does not meet the requirements of the design standards. Moreover, when the grease gun is connected to the grease injection port of the grease injection valve, the connection is relatively loose, and generally requires manual limit pressing, which is time-consuming and labor-intensive, and the limit effect is poor.

[0003] To solve this problem, after searching, in the prior art, announcement number CN211449728U discloses a grease injection conversion joint device with a check valve, including a ball valve, a valve seat support ring is provided at the top of one side of the inner part of the ball valve, the ball valve is located above the valve seat support ring and is fixedly connected with left and right bodies of the valve seat, the left and right bodies of the valve seat are located above the valve seat support ring and have a grease injection groove, and the left and right bodies of the valve seat are located above the grease injection groove and have a No. 1 threaded groove; it is connected to the left and right bodies through a conversion joint at one end through an NPT thread, and the other end has sufficient length to provide the arrangement of the check valve and the grease injection valve; due to the presence of the check valve, the internal pressure of the valve will not spray out from the injection port after the valve cap at the end of the grease injection valve is opened during grease injection, thereby ensuring the safety of grease injection, and through the use of the support rod, the support plate, the T-shaped threaded adjustment rod, the No. 2 threaded groove and the pressure block, it is convenient to fit the output end of the grease injection gun tightly with the injection port connected to the grease injection valve, making the connection between them more compact.

[0004] The above technology discloses a grease injection conversion joint device with a check valve, which is connected to the thread groove at the grease injection hole of the ball valve through the arranged threaded teeth, and uses the check valve for non-return. When the grease gun head is inserted, the upper part is pressed and limited by the T-shaped threaded adjustment rod, the pressure block and other structures. However, there are the following shortcomings when using it: 1. The method of pressing and fixing the grease gun head at the upper part after the insertion has great restrictions on the appearance of the upper structure of the grease gun head, and it is difficult to flexibly use different grease gun heads, and the applicability is not ideal; 2. After the grease gun head is inserted, there is a lack of a structure to seal the outer side of the gun head, and grease is easily sprayed out from the gap on the outer side of the gun head during grease injection; in order to improve the existing shortcomings, we have proposed a grease injection conversion joint device with a check valve. Utility Model Content

[0005] The utility model aims to provide a grease injection conversion joint device with a check valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a grease injection conversion joint device with a check valve, comprising a grease injection conversion joint device body matched with a grease injection hole of a ball valve, a thread groove 1 being provided on the grease injection hole of the ball valve, the grease injection hole of the ball valve being provided with a thread groove 1, the grease injection conversion joint device body comprising a threaded joint matched with the thread groove 1, a channel being provided on the top of the threaded joint, and the threaded joint being connected with the thread groove 1 at the grease injection hole of the ball valve to achieve connection and fixation;

[0007] The top of the threaded joint is fixedly connected with a vertical pipe, and a check valve assembly and a conical sealing rubber sleeve located above the check valve assembly are fixedly installed in the vertical pipe. The check valve assembly is used to automatically open the grease passage by using the injection force when the sealing grease is injected into the vertical pipe, and automatically close the anti-backflow when the injection is stopped. The conical sealing rubber sleeve is used to fit and seal the outer side of the grease injection gun head when it is inserted;

[0008] Two clamping blocks are arranged above the conical sealing rubber sleeve, and the adjacent sides of the two clamping blocks are arranged in a serrated structure. Threaded cross-guide drive assemblies are embedded and fixed on the inner walls of both sides of the vertical pipe, and the outer rotating sleeve of the vertical pipe is provided with a linkage assembly fixedly connected to the two threaded cross-guide drive assemblies. The linkage assembly is used to drive the two threaded cross-guide drive assemblies to rotate synchronously, and the two threaded cross-guide drive assemblies are used to drive the two clamping blocks to clamp the grease injection gun head when it is inserted.

[0009] Preferably, the check valve assembly includes a conical sleeve fixedly mounted in a vertical pipe, a sealing movable sleeve inside the conical sleeve is provided with a hollow plugging ball with an opening at the bottom, a round support rod is fixedly connected between the front inner wall and the rear inner wall of the vertical pipe, the top of the round support rod is fixedly connected to a T-shaped guide rod located in the hollow plugging ball, the bottom of the hollow plugging ball is fixedly connected to a sealing plate, the sealing plate is slidably mounted on the T-shaped guide rod, a spring is fixedly connected between the top inner wall of the T-shaped guide rod and the top of the sealing plate, and the spring is movably mounted on the T-shaped guide rod.

[0010] Preferably, the threaded cross-guide drive assembly includes a cross tube embedded in the side wall of the vertical tube, a moving rod is provided in the sliding sleeve inside the cross tube, the adjacent ends of the two moving rods are respectively fixedly connected to the repelling sides of the two clamping blocks, a screw is provided in the rotating sleeve inside the cross tube, and the moving rod is threadedly sleeved on the corresponding screw.

[0011] Preferably, the linkage assembly includes a rotating sleeve arranged on the outside of the vertical tube, the outside of the rotating sleeve is annularly and evenly spaced with a plurality of handle rods fixedly connected thereto, a fixed sleeve inside the rotating sleeve is provided with an umbrella-shaped gear ring, both sides of the umbrella-shaped gear ring are meshed with umbrella-shaped gears, the two umbrella-shaped gears are symmetrically arranged, and the adjacent sides of the two umbrella-shaped gears are respectively fixedly connected to the repelling ends of the two screw rods.

[0012] Preferably, the repelling ends of the two moving rods are each provided with a second thread groove, and the second thread groove is threadably connected to the corresponding screw rod.

[0013] Preferably, a limiting groove is provided at the bottom of the moving rod, and a limiting block which is slidably connected to the corresponding limiting groove is fixedly connected to the inner wall of the bottom of the transverse tube.

[0014] Preferably, the vertical pipe is located inside the umbrella-shaped gear ring and does not contact the inner side of the umbrella-shaped gear ring.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. This grease injection conversion joint device with a check valve can stably fit and seal the outer side of the grease injection gun head when the grease injection gun head is inserted, thereby preventing the sealing grease from seeping or spraying upwards during grease injection, and improving the grease injection stability;

[0017] 2. This grease injection conversion joint device with a check valve can clamp and restrict the grease injection gun head from both sides to the middle to prevent it from falling off by cooperating with the vertical pipe, the threaded cross-guide drive group, the linkage assembly and the clamping block. By driving the two clamping blocks to contract and clamp from both sides to the middle, it is not affected by the upper structure and the thickness of the gun head, so it is convenient to fix and restrict various grease injection gun heads and improve applicability.

[0018] 3. This grease injection conversion joint device with a check valve can automatically unseal when injecting sealing grease and automatically close to prevent backflow after injection through the set check valve assembly, thereby achieving a check effect.

[0019] The utility model is provided with a series of structures, which can stably fit and seal the outer side of the grease injection gun head when it is inserted, so as to avoid the phenomenon of sealing grease seeping or spraying upwards during grease injection, improve the stability of grease injection, facilitate the grease injection gun head to be clamped and restricted from both sides to the middle to prevent it from falling off, is not affected by its upper structure and the thickness of the gun head, is convenient for fixing and restricting various grease injection gun heads, improves applicability, and is convenient for automatic unsealing when injecting sealing grease and automatic sealing to prevent backflow after injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a grease injection conversion joint device with a check valve proposed by the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure viewed from above;

[0022] Figure 3 This is a schematic diagram of the main cross-sectional structure of a grease injection conversion joint device with a check valve proposed by the utility model;

[0023] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A;

[0024] Figure 5 for Figure 3 Schematic diagram of the enlarged structure of part B in FIG.

[0025] In the figure: 1. threaded joint; 2. vertical pipe; 3. tapered sleeve; 4. hollow plugging ball; 5. sealing plate; 6. spring; 7. T-shaped guide rod; 8. round support rod; 9. tapered sealing rubber sleeve; 10. clamping block; 11. moving rod; 12. horizontal pipe; 13. screw; 14. bevel gear; 15. bevel gear ring; 16. rotating sleeve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figures 1 to 5 As shown, a grease injection conversion joint device with a check valve proposed in this embodiment includes a grease injection conversion joint device body matched with a grease injection hole of a ball valve, a thread groove 1 is provided on the grease injection hole of the ball valve, and the grease injection conversion joint device body includes a threaded joint 1 adapted to the thread groove 1, and a channel is provided on the top of the threaded joint 1, and the threaded joint 1 is connected to the thread groove 1 at the grease injection hole of the ball valve to achieve connection and fixation;

[0028] The top of the threaded joint 1 is fixedly connected with a vertical pipe 2, and a check valve assembly and a conical sealing rubber sleeve 9 located above the vertical pipe 2 are fixedly installed. The check valve assembly is used to automatically open the grease passage by using the injection force when the sealing grease is injected into the vertical pipe 2, and automatically close the anti-backflow when the injection is stopped. The conical sealing rubber sleeve 9 is used to fit and seal the outer side of the grease injection gun head when it is inserted;

[0029] Two clamping blocks 10 are arranged above the conical sealing rubber sleeve 9, and the adjacent sides of the two clamping blocks 10 are arranged in a serrated structure. Threaded cross-guide drive assemblies are embedded and fixed on the inner walls of both sides of the vertical pipe 2, and the outer rotating sleeve of the vertical pipe 2 is provided with a linkage assembly fixedly connected to the two threaded cross-guide drive assemblies. The linkage assembly is used to drive the two threaded cross-guide drive assemblies to rotate synchronously, and the two threaded cross-guide drive assemblies are used to drive the two clamping blocks 10 to clamp the grease gun head when it is inserted.

[0030] Specifically, the check valve assembly includes a conical sleeve 3 fixedly sleeved in the vertical pipe 2, a hollow plugging ball 4 with an opening at the bottom is provided in the sealing movable sleeve in the conical sleeve 3, wherein the outer side of the hollow plugging ball 4 is bonded and coated with a sealing rubber sleeve that is in active contact with the inner wall of the conical sleeve 3, a round support rod 8 is fixedly connected between the front inner wall and the rear inner wall of the vertical pipe 2, a T-shaped guide rod 7 located in the hollow plugging ball 4 is fixedly connected to the top of the round support rod 8, a sealing plate 5 is fixedly connected to the bottom of the hollow plugging ball 4, the sealing plate 5 is slidably sleeved on the T-shaped guide rod 7, a spring 6 is fixedly connected between the top inner wall of the T-shaped guide rod 7 and the top of the sealing plate 5, and the spring 6 is movably sleeved on the T-shaped guide rod 7; the conical sleeve 3, hollow plugging ball 4, round support rod 8, T-shaped guide rod 7, sealing plate 5 and spring 6 are arranged in cooperation. When the sealing grease is pressurized and injected, the sealing grease squeezes and drives the hollow plugging ball 4 to move downward to unseal the inner side of the conical sleeve 3, and the hollow plugging ball 4 drives the sealing plate 5 to slide downward on the T-shaped guide rod 7 and stretches the spring 6. At this time, the sealing grease enters the channel on the threaded joint 1 downward through the unsealed space, and then is injected into the corresponding ball valve through the ball valve grease injection hole. When the injection is stopped, the elastic force of the spring 6 in the stretched state is used to drive the hollow plugging ball 4 to move upward through the sealing plate 5 to seal the inside of the conical sleeve 3, thereby achieving the effect of automatic sealing and anti-backflow after the sealing grease is injected.

[0031] Furthermore, the threaded cross-guide drive assembly includes a cross tube 12 embedded in the side wall of the vertical tube 2, wherein the inner walls on both sides of the vertical tube 2 are provided with embedding holes, the inner walls of the embedding holes are fixedly connected to the outer sides of the corresponding cross tubes 12, and a moving rod 11 is slidably sleeved in the cross tube 12, wherein a limiting groove is provided at the bottom of the moving rod 11, and a limiting block slidably connected to the corresponding limiting groove is fixedly connected to the inner wall of the bottom of the cross tube 12, which has the effect of limiting and preventing the moving rod 11 from falling off, and the adjacent ends of the two moving rods 11 are respectively fixedly connected to the repelling sides of the two clamping blocks 10, and a screw 13 is rotatably sleeved in the cross tube 12, wherein a first bearing is fixedly installed in the cross tube 12, and the inner side of the inner ring of the first bearing It is fixedly connected to the outer side of the corresponding screw rod 13, which has the effect of rotatably installing the screw rod 13. The moving rod 11 is threadedly sleeved on the corresponding screw rod 13, and the two moving rods 11 have a second thread groove on one end that repels each other, and the second thread groove is threadedly connected to the corresponding screw rod 13. The threaded connection relationship between the screw rod 13 and the second thread groove is utilized to facilitate the lateral displacement of the corresponding moving rod 11 when the screw 13 rotates. The arranged cross tube 12, moving rod 11 and screw 13 cooperate to drive the two moving rods 11 to move similarly when the two screws 13 rotate in opposite directions. The two moving rods 11 drive the two clamping blocks 10 to move similarly, thereby stably and fixedly supporting the inserted grease injection gun head.

[0032] Furthermore, the linkage assembly includes a rotating sleeve 16 which is rotatably sleeved on the outer side of the vertical tube 2, wherein two second bearings are fixedly sleeved inside the rotating sleeve 16, and the inner rings of the second bearings are fixedly sleeved on the outer side of the vertical tube 2, so as to rotatably install the rotating sleeve 16. A plurality of handle rods are fixedly connected to the outer side of the rotating sleeve 16 in an annular shape with equal intervals, and an umbrella gear ring 15 is fixedly sleeved inside the rotating sleeve 16, and umbrella gears 14 are meshed on both sides of the umbrella gear ring 15. The two umbrella gears 14 are symmetrically arranged, and the sides of the two umbrella gears 14 that are close to each other are fixedly connected to the repelling ends of the two screw rods 13 respectively, and the vertical tube 2 is located in the umbrella gear ring 15 and does not contact the inner side of the umbrella gear ring 15; the rotating sleeve 16, the handle rod, the umbrella gear ring 15 and the umbrella gear 14 are matched, and the handle rod is rotated to drive the rotating sleeve 16 to rotate, and the rotating sleeve 16 drives the umbrella gear ring 15 to rotate, and the umbrella gear ring 15 drives the two umbrella gears 14 to rotate in the opposite direction, and the two umbrella gears 14 that rotate in the opposite direction are used to drive the two screw rods 13 to rotate in the opposite direction.

[0033] The method of using this embodiment is as follows: when using the grease injection conversion joint device with a check valve, first connect the threaded joint 1 with the threaded groove at the grease injection hole of the external ball valve to achieve connection and fixation, insert the gun head of the grease injection gun head downward into the conical sealing rubber sleeve 9, so that its outer side is squeezed and fitted with the inner side of the conical sealing rubber sleeve 9 to achieve sealing of the outer side of the gun head of the grease injection gun head, and then rotate the handle rod forward to drive the rotating sleeve 16 to rotate forward, and the rotating sleeve 16 drives the umbrella gear ring 15 to rotate, and the umbrella gear ring 15 drives the two umbrella gears 14 to rotate in the opposite direction, and the two umbrella gears 14 drive the two screws 13 to rotate in the opposite direction, and the two screws 1 3 can drive the two moving rods 11 to move close to each other when rotating in opposite directions, and the moving rods 11 slide in the corresponding transverse tubes 12. At this time, the two moving rods 11 drive the two clamping blocks 10 to move close to each other, and the two clamping blocks 10 that move close to each other clamp the grease injection gun head, so as to achieve the effect of clamping, restricting and preventing the grease injection gun head from falling off. By driving the two clamping blocks 10 to contract and clamp from both sides to the middle, it is not affected by the upper structure and the thickness of the gun head, so it is convenient to fix and restrict various grease injection gun heads, and improves the applicability; and by using the conical sealing rubber sleeve 9 to seal the outer side of the grease injection gun head, it can avoid the phenomenon of sealing grease seeping or spraying upwards, and improve the stability of grease injection;

[0034] When injecting grease, sealing grease is injected into the vertical pipe 2 under pressure through the grease injection gun head. The sealing grease squeezes and drives the hollow plugging ball 4 to move downward. The downwardly moved hollow plugging ball 4 is separated from the inner side of the conical sleeve 3, thereby unsealing the inner side of the conical sleeve 3. The hollow plugging ball 4 drives the sealing plate 5 to slide downward on the T-shaped guide rod 7 and stretches the spring 6. At this time, the sealing grease enters the channel on the threaded joint 1 downward through the unsealed space, and is then injected into the corresponding ball valve through the ball valve grease injection hole. When the injection stops, the elastic force of the spring 6 in the stretched state drives the hollow plugging ball 4 to move upward through the sealing plate 5 to seal the inside of the conical sleeve 3, thereby achieving the effect of automatic sealing and anti-backflow after the sealing grease is injected.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A grease injection conversion joint device with a check valve, comprising a grease injection conversion joint device body matched with a grease injection hole of a ball valve, wherein a thread groove 1 is provided on the grease injection hole of the ball valve, and characterized in that: The grease injection conversion joint device body comprises a threaded joint (1) adapted to the thread groove 1, and a channel is arranged at the top of the threaded joint (1); The top of the threaded joint (1) is fixedly connected to a vertical pipe (2), and a check valve assembly and a conical sealing rubber sleeve (9) located above the vertical pipe (2) are fixedly installed inside the vertical pipe (2); Two clamping blocks (10) are arranged above the conical sealing rubber sleeve (9), and the adjacent sides of the two clamping blocks (10) are arranged in a sawtooth structure. Threaded transverse guide drive components are embedded and fixed on the inner walls of both sides of the vertical pipe (2), and the outer side of the vertical pipe (2) is rotatably sleeved with a linkage component fixedly connected to the two threaded transverse guide drive components.

2. A grease injection conversion joint device with a check valve according to claim 1, characterized in that: The check valve assembly comprises a conical sleeve (3) fixedly sleeved in a vertical pipe (2), a hollow plugging ball (4) with an opening at the bottom being provided in a sealing movable sleeve in the conical sleeve (3), a round support rod (8) fixedly connected between the front inner wall and the rear inner wall of the vertical pipe (2), a T-shaped guide rod (7) located in the hollow plugging ball (4) fixedly connected to the top of the round support rod (8), a sealing plate (5) fixedly connected to the bottom of the hollow plugging ball (4), the sealing plate (5) slidably sleeved on the T-shaped guide rod (7), a spring (6) fixedly connected between the top inner wall of the T-shaped guide rod (7) and the top of the sealing plate (5), the spring (6) movably sleeved on the T-shaped guide rod (7).

3. A grease injection conversion joint device with a check valve according to claim 2, characterized in that: The threaded transverse guide drive assembly comprises a transverse tube (12) embedded in the side wall of the vertical tube (2), a moving rod (11) is slidably sleeved in the transverse tube (12), the adjacent ends of the two moving rods (11) are respectively fixedly connected to the repelling sides of the two clamping blocks (10), a screw rod (13) is rotatably sleeved in the transverse tube (12), and the moving rod (11) is threadedly sleeved on the corresponding screw rod (13).

4. A grease injection conversion joint device with a check valve according to claim 3, characterized in that: The linkage assembly comprises a rotating sleeve (16) which is rotatably mounted on the outside of the vertical pipe (2); the outside of the rotating sleeve (16) is annularly and fixedly connected with a plurality of handle bars at equal intervals; a bevel gear ring (15) is fixedly mounted inside the rotating sleeve (16); both sides of the bevel gear ring (15) are meshed with bevel gears (14); the two bevel gears (14) are symmetrically arranged; and the adjacent sides of the two bevel gears (14) are respectively fixedly connected with the repelling ends of the two screw rods (13).

5. The grease injection conversion joint device with a check valve according to claim 3, characterized in that: The repelling ends of the two moving rods (11) are each provided with a second thread groove, and the second thread groove is threadedly connected to the corresponding screw rod (13).

6. A grease injection conversion joint device with a check valve according to claim 3, characterized in that: A limiting groove is provided at the bottom of the moving rod (11), and a limiting block slidably connected to the corresponding limiting groove is fixedly connected to the inner wall of the bottom of the transverse tube (12).

7. A grease injection conversion joint device with a check valve according to claim 4, characterized in that: The vertical pipe (2) is located inside the umbrella-shaped gear ring (15) and does not contact the inner side of the umbrella-shaped gear ring (15).

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