Grease injection extension joint

Abstract

The utility model relates to a grease injection extension connector which comprises a grease injection shell, a grease injection channel is formed in the grease injection shell in a penetrating mode, the two ends of the grease injection channel are in threaded connection with a non-return assembly and a connecting assembly respectively, and a sealing assembly is slidably connected into the grease injection channel. The non-return assembly is provided with a grease outlet channel communicating with the grease injection channel in a penetrating mode, the connecting assembly is provided with a grease inlet channel communicating with the grease injection channel in a penetrating mode, the sealing assembly is provided with a grease conveying channel communicating with the grease injection channel and the grease inlet channel at the same time, one end of the sealing assembly is connected to the non-return assembly, and the other end of the sealing assembly is connected to the sealing assembly. The sealing assembly is pushed by the non-return assembly to the other end to block the grease inlet channel or moves to the other end to open the grease inlet channel. According to the grease injection nozzle, the technical problem that the grease injection nozzle is difficult to replace after breaking down can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to grease injection nozzle technical field, especially a kind of grease injection extension joint. BACKGROUND

[0002] Grease injection nozzle is a kind of device suitable for filling lubricating grease for large machinery, petrochemical equipment, ball valve, flat gate valve, wellhead device and other equipment.

[0003] Grease injection equipment injects lubricating grease or cleaning fluid to valve ball sealing system through grease injection nozzle, to realize the maintenance and maintenance of ball valve.But in the long-term use process, since the lower end of grease injection nozzle is in the fluid pressure environment in valve ball, when grease injection nozzle appears leakage, spring failure and blockage caused by impurities and other faults, there is certain difficulty when needing to be replaced. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of grease injection extension joint, which can improve the technical problem of difficulty in replacing after the failure of grease injection nozzle.

[0005] The technical solution of the utility model to solve the above technical problem is as follows:

[0006] A kind of grease injection extension joint, comprising grease injection shell, the grease injection shell is through and is equipped with grease injection channel, the both ends of the grease injection channel are respectively connected with check assembly and connecting assembly by screw thread, and the grease injection channel is slidably connected with sealing assembly, the check assembly is through and is equipped with the grease outlet channel that communicates the grease injection channel, the connecting assembly is through and is equipped with the grease inlet channel that communicates the grease injection channel, and the sealing assembly is equipped with the grease delivery channel that simultaneously communicates the grease injection channel and the grease inlet channel, one end of the sealing assembly is connected to the check assembly, the sealing assembly is pushed to the other end by the check assembly and is blocked in the grease inlet channel or moves to the other end and opens the grease inlet channel.

[0007] The utility model has the beneficial effects that: the disassembly and assembly of check assembly and connecting assembly can be realized by screwing, to improve the technical problem of difficulty in replacing after the failure of grease injection nozzle.

[0008] On the basis of the above technical solution, the utility model can also be improved as follows.

[0009] Further, the check assembly includes a connecting block connected to the grease injection channel by screw thread and a spring connected to one end of the connecting block, the grease outlet channel is through and is equipped in the connecting block, and the other end of the spring is connected to the sealing assembly.

[0010] The beneficial effects of the above further scheme are that: the spring force is used to push the sealing assembly, so that the other end of the sealing assembly is blocked in the grease inlet channel.

[0011] Further, the sealing assembly comprises a piston slidably connected to the grease injection channel at one end, the grease injection channel is arranged in the piston, one end of the piston is connected to the check valve assembly, and the other end of the piston blocks or opens the grease injection channel.

[0012] The beneficial effect of the above further scheme is that the piston is used to block the grease injection channel under the pushing of the check valve assembly, thereby achieving the blocking of the grease injection channel, and achieving the sealing effect.

[0013] Further, the sealing assembly further comprises a sealing ring fixed to the other end of the piston, and the sealing ring abuts or is away from the grease injection channel.

[0014] The beneficial effect of the above further scheme is that the sealing effect is improved by the sealing ring.

[0015] Further, the other end of the piston extends into the grease injection channel, and the side surface abuts or separates from the inner wall of the grease injection channel, and the opposite sides of the two are matched with inclined surface structures.

[0016] The beneficial effect of the above further scheme is that the wedge-shaped sealing structure is formed by the matched inclined surface structures, and the sealing effect is more tightly achieved under the pushing of the check valve assembly.

[0017] Further, the connecting assembly comprises a connecting seat threadedly connected to the inner wall of the grease injection channel at one end, and the grease injection channel is arranged through the connecting seat.

[0018] The beneficial effect of the above further scheme is that when replacing, only the connecting seat needs to be rotated.

[0019] Further, the connecting assembly further comprises a sealing sleeve sleeved outside the connecting seat, and the sealing sleeve abuts against the inner wall of the grease injection channel.

[0020] The beneficial effect of the above further scheme is that the sealing sleeve can relatively improve the sealing effect between the connecting seat and the grease injection shell.

[0021] Further, the grease injection channel comprises a grease flow port arranged in the side wall of the sealing assembly and a straight-through hole arranged at one end of the sealing assembly, one end of the grease flow port is communicated with the grease injection channel, the other end of the grease flow port is communicated with one end of the straight-through hole, and the other end of the straight-through hole penetrates through the sealing assembly towards one end of the check valve assembly to be communicated with the grease injection channel.

[0022] The beneficial effect of the further scheme is that when the grease injection gun is used to inject grease into the connecting assembly towards the grease inlet channel, the gradually injected grease forms pressure on the sealing assembly, the pressure pushes the sealing assembly away from the push force of the check valve assembly, so that the grease inlet channel and the grease injection channel are communicated, the liquid enters the grease injection channel and the grease outlet, flows out from the straight hole and enters the grease injection channel, and then flows out from the grease outlet, thereby completing the injection operation.

[0023] Further, one end of the sealing assembly is slidably connected to the side wall of the grease injection channel, and the other end has a gap relative to the inner wall of the grease injection channel, and the grease outlet is arranged at both ends of the sealing assembly.

[0024] The beneficial effect of the further scheme is that the other end of the sealing assembly has a gap relative to the inner wall of the grease injection channel, that is, a space for liquid flow is formed, so that the liquid flowing out of the grease inlet channel can smoothly flow into the grease outlet.

[0025] Further, the grease injection shell is provided with a fine adjustment assembly, the fine adjustment assembly comprises a toothed plate fixedly connected to the outer wall of the sealing assembly and a fine adjustment tooth disc engaged with the toothed plate, the toothed plate is slidably connected to the grease injection shell along the sliding direction of the sealing assembly, and the fine adjustment tooth disc is rotatably connected to the grease injection shell.

[0026] The beneficial effect of the further scheme is that when impurities appear in the interior and cause the sealing assembly to be stuck, the toothed plate can be driven to slide by rotating the fine adjustment tooth disc, so that the sealing assembly slides in the interior of the grease injection shell, thereby achieving the purpose of adjusting the position of the sealing assembly, and after adjustment, the sealing assembly is reset by the push of the check valve assembly. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a first cross-sectional structure schematic view of the grease injection extension joint of the utility model.

[0028] Figure 2 It is a second cross-sectional structure schematic view of the grease injection extension joint of the utility model.

[0029] Figure 3 It is Figure 2 The side cross-sectional structure schematic view shown in the figure.

[0030] In the drawings, the components represented by each reference numeral are listed as follows:

[0031] 1, grease injection shell; 11, grease injection channel; 12, limiting groove; 13, rotating hole;

[0032] 2, check valve assembly; 21, connecting block; 211, grease outlet channel; 22, spring;

[0033] 3, sealing assembly; 31, piston; 32, sealing ring; 33, grease outlet; 34, straight hole;

[0034] 4, connecting assembly; 41, connecting seat; 411, grease inlet channel; 42, sealing sleeve;

[0035] 5, connecting sleeve;

[0036] 6, fine adjustment assembly; 61, toothed plate; 62, fine adjustment toothed disc; 63, driving rod. DETAILED DESCRIPTION

[0037] The principles and characteristics of the present application are described below in conjunction with the accompanying drawings, and the examples are used to explain the present application and are not intended to limit the scope of the present application.

[0038] Example 1

[0039] As Figure 1 A grease injection extension joint, comprising a grease injection shell 1, the grease injection shell 1 is provided with a grease injection channel 11, the two ends of the grease injection channel 11 are respectively threadedly connected with a check assembly 2 and a connecting assembly 4, and the grease injection channel 11 is slidably connected with a sealing assembly 3, the check assembly 2 is provided with an outlet grease channel 211 communicating with the grease injection channel 11, the connecting assembly 4 is provided with a grease inlet channel 411 communicating with the grease injection channel 11, and the sealing assembly 3 is provided with a grease feeding channel communicating with the grease injection channel 11 and the grease inlet channel 411, one end of the sealing assembly 3 is connected to the check assembly 2, and the sealing assembly 3 is pushed by the check assembly 2 to the other end to block the grease inlet channel 411 or moves to the other end to open the grease inlet channel 411.

[0040] The beneficial effects of the present embodiment are that the check assembly 2 and the connecting assembly 4 can be disassembled by screwing, thereby improving the technical problem that it is difficult to replace the grease injection nozzle after failure.

[0041] When performing the grease injection operation, the other end of the grease injection gun and the grease injection shell 1 is communicated, and the grease injection operation can be performed. The liquid (lubricating grease, lubricating liquid) gradually injected into the grease inlet channel 411 extrudes the sealing assembly 3, so that the sealing assembly 3 slides (shown as sliding to the right in the figure) against the pushing force of the check assembly 2, so that the liquid enters the grease injection channel 11, and then enters the grease feeding channel from the grease injection channel 11, and is discharged from the grease injection channel 11, and finally is discharged from the outlet grease channel 211, completing the liquid injection operation.

[0042] After the grease injection operation is completed, the sealing assembly 3 slides reversely under the pushing force of the check assembly 2 and completes the closure of the grease inlet channel 411.

[0043] As a specific solution of the above embodiment, an external thread is formed on the outside of the other end (the left end shown in the figure) of the grease injection shell 1, so as to be screwed with the grease injection gun.

[0044] Both ends (the left end and the right end shown in the figure) of the grease injection channel 11 of the grease injection shell 1 are formed with internal threads, so as to be screwed with the check valve assembly 2 and the connecting assembly 4 respectively. The grease injection channel 11 is a stepped through-hole structure as a whole, in which the end hole diameter is smaller than the minimum inner diameter of the internal threads formed at both ends, so as to facilitate the disassembly and assembly of the sealing assembly 3 from the end of the grease injection shell 1, and the stepped surface formed at the middle end relative to the two side ends forms a limiting effect on the installation of the check valve assembly 2 and / or the connecting assembly 4 (only shown as forming a limiting effect on the check valve assembly 2 in the figure).

[0045] The outer diameter of the sealing assembly 3 is slidably connected with the inner curved surface of the middle end of the sealing assembly 3, so as to ensure sealing.

[0046] In a specific solution of the above embodiment, the connection mode of the check valve assembly 2 and the sealing assembly 3 can be abutting each other or fixedly connected with each other.

[0047] During specific installation, the check valve assembly 2 or the connecting assembly 4 can be screwed first, then the sealing assembly 3 is slidably installed, and finally the remaining connecting assembly 4 or check valve assembly 2 is screwed and installed.

[0048] Embodiment 2

[0049] As Figure 1 In the embodiment 1, the check valve assembly 2 includes a connecting block 21 screwed with the grease injection channel 11 and a spring 22 connected at one end with the connecting block 21, and the grease outlet channel 211 is formed through the connecting block 21, and the other end of the spring 22 is connected with the sealing assembly 3.

[0050] The beneficial effect of using the preferred solution in the above embodiment is that the spring 22 is used to push the sealing assembly 3, so that the other end of the sealing assembly 3 is blocked in the grease injection channel 411.

[0051] During installation, the connecting block 21 is screwed and installed and abuts against the stepped surface formed by the grease injection channel 11, so as to ensure that the screwing is in place.

[0052] As one of the parallel solutions of the above embodiment, the grease outlet channel 211 is a straight hole, and one end of the spring 22 is fixedly connected or abuts against the end of the connecting block 21.

[0053] As the second parallel solution of the above-mentioned embodiment, the grease outlet passage 211 is a stepped hole, and the hole diameter near one end of the spring 22 is larger; one end of the spring 22 is fixedly connected or abuts against the stepped surface formed by the grease outlet passage 211. At this time, the radial sidewall of the spring 22 abuts against the inner wall of the grease outlet passage 211, and the limiting effect of the spring 22 is formed by the inner wall of the grease outlet passage 211, so as to keep the spring 22 in a straight line.

[0054] Embodiment 3

[0055] As Figure 1 On the basis of embodiments 1 and 2, the sealing assembly 3 comprises a piston 31 slidably connected to the grease injection passage 11 at one end, the grease feeding passage is arranged in the piston 31, one end of the piston 31 is connected to the check valve assembly 2, the other end blocks or opens the grease inlet passage 411, and the grease feeding passage is arranged in the piston 31.

[0056] The beneficial effect of the preferred solution in the above-mentioned embodiment is that the piston 31 blocks the grease inlet passage 411 under the pushing of the check valve assembly 2, thereby blocking the grease feeding passage and achieving the sealing effect.

[0057] As a specific solution of the above-mentioned embodiment, the piston 31 is in a stepped shape as a whole, one end is a large-diameter end, which is adapted and slidably connected to the inner wall of the middle end of the grease injection passage 11, and the other end is a small-diameter end, which is used to block the grease inlet passage 411.

[0058] Embodiment 4

[0059] As Figure 1 On the basis of embodiments 1-3, the sealing assembly 3 further comprises a sealing ring 32 fixed to the other end of the piston 31, and the sealing ring 32 abuts against or is away from the grease inlet passage 411.

[0060] The beneficial effect of the preferred solution in the above-mentioned embodiment is that the sealing effect is improved by the sealing ring 32.

[0061] A ring groove is arranged on the piston 31, and the sealing ring 32 is adapted and embedded in the ring groove.

[0062] As one of the specific solutions of the above-mentioned embodiment, when the end sidewall of the piston 31 in the length direction blocks the piston 31, the ring groove is arranged on the other end sidewall.

[0063] As the second specific solution of the above-mentioned embodiment, when the end sidewall of the piston 31 in the radial direction blocks the piston 31, the ring groove is arranged on the other end radial sidewall.

[0064] The sealing ring 32 can be made of rubber.

[0065] Embodiment 5

[0066] AsFigure 1 On the basis of Embodiment 1-4, the other end of the piston 31 extends into the grease inlet channel 411, and the side surface abuts or separates from the inner wall of the grease inlet channel 411, and the opposite sides are both matched with the inclined surface structure.

[0067] The beneficial effect of the preferred scheme in the above embodiment is that the wedge-shaped sealing structure is formed by the matched inclined surface structure, and under the pushing of the check assembly 2, a more tight sealing effect is achieved.

[0068] As a parallel scheme of the above embodiment, the other end of the piston 31 extends into the grease inlet channel 411, and the side surface abuts or separates from the inner wall of the grease inlet channel 411, and the opposite sides are both matched with the inclined surface structure.

[0069] Embodiment 6

[0070] As Figure 1 On the basis of Embodiments 1-5, the connecting assembly 4 includes a connecting seat 41 screwed to the inner wall of the grease inlet channel 411.

[0071] The beneficial effect of the preferred scheme in the above embodiment is that during replacement, only the connecting seat 41 needs to be rotated.

[0072] As a specific scheme of the above embodiment, the connecting seat 41 is in the shape of a stepped shaft as a whole, and the small-diameter end is adapted and screwed to the grease inlet channel 11 of the grease shell 1, and the large-diameter end abuts the outer end of the grease shell 1 to form a limit, and the small-diameter end of the connecting seat 41 is spaced apart from the stepped surface in the middle of the grease shell 1 to form a space for the grease to pass through.

[0073] Embodiment 7

[0074] As Figure 1 On the basis of Embodiments 1-6, the connecting assembly 4 further includes a sealing sleeve 42 sleeved outside the connecting seat 41, and the sealing sleeve 42 abuts the inner wall of the grease inlet channel 411.

[0075] The beneficial effect of the preferred scheme in the above embodiment is that the sealing sleeve 42 can relatively improve the sealing effect between the connecting seat 41 and the grease shell 1.

[0076] The sealing sleeve 42 can be made of rubber. The sealing sleeve 42 is installed between the threaded end and the large-diameter end of the connecting seat 41, which can prevent the sealing sleeve 42 from falling off.

[0077] Embodiment 8

[0078] As Figure 1 And Figure 3On the basis of Embodiments 1-7, the grease feeding channel comprises a grease outlet 33 formed in the side wall of the sealing assembly 3 and a straight-through hole 34 formed in one end of the sealing assembly 3, one end of the grease outlet 33 is communicated with the grease feeding channel 11, the other end is communicated with one end of the straight-through hole 34, the other end of the straight-through hole 34 penetrates through the sealing assembly 3 towards the one end of the check assembly 2 to be communicated with the grease feeding channel 11.

[0079] The beneficial effect of the preferred scheme in the above embodiments is that when the grease is injected from the connecting assembly 4 towards the grease feeding channel 411, the pressure gradually formed by the injection of the grease pushes the sealing assembly 3 away from the check assembly 2, so that the grease feeding channel 411 and the grease feeding channel 11 are communicated, the liquid enters the grease feeding channel 11 and then flows out from the straight-through hole 34 and enters the grease feeding channel 11, and finally flows out from the grease outlet 211 to complete the injection operation.

[0080] As a specific scheme of the above embodiments, the cross section of the grease outlet 33 can be rectangular or strip-shaped.

[0081] Embodiment 9

[0082] As Figure 1 On the basis of Embodiments 1-8, one end of the sealing assembly 3 is slidingly connected to the inner wall of the grease feeding channel 11, the other end has a gap relative to the inner wall of the grease feeding channel 11, and the grease outlet 33 is formed in both ends of the sealing assembly 3.

[0083] The beneficial effect of the preferred scheme in the above embodiments is that the other end of the sealing assembly 3 has a gap relative to the inner wall of the grease feeding channel 11, i.e. a space for the liquid to flow, so as to ensure that the liquid flowing out of the grease feeding channel 411 can smoothly flow into the grease outlet 33.

[0084] When the piston 31 is pushed to the right, the left end of the grease outlet 33 always has a gap relative to the left end of the inner wall of the grease feeding channel 11, so as to ensure that the injected liquid can smoothly enter the grease outlet 33.

[0085] Embodiment 10

[0086] As Figure 2 And Figure 3 On the basis of Embodiments 1-9, the grease feeding shell 1 is provided with a fine adjustment assembly 6, the fine adjustment assembly 6 comprises a gear plate 61 fixedly connected to the outer wall of the sealing assembly 3 and a fine adjustment gear disc 62 engaged with the gear plate 61, the gear plate 61 is slidingly connected to the grease feeding shell 1 along the sliding direction of the sealing assembly 3, and the fine adjustment gear disc 62 is rotationally connected to the grease feeding shell 1.

[0087] The beneficial effect of the preferred solution in the above embodiment is that when the sealing assembly 3 is stuck due to impurities in the interior, the toothed plate 61 can be driven to slide by rotating the fine adjustment toothed disc 62, driving the sealing assembly 3 to slide in the interior of the grease injection shell 1, so as to adjust the position of the sealing assembly 3. After adjustment, the sealing assembly 3 is reset by the push of the check assembly 2.

[0088] As a specific solution of the above embodiment, at least one limiting groove 12 is formed in the inner wall of the middle end of the grease injection shell 1. The number of limiting grooves 12 can be one, two, three, four, etc. Only two are shown in the figure. Each toothed plate 61 is adapted and slidingly connected to each limiting groove 12.

[0089] Among them, the limiting groove 12 is a stepped groove, and the end with a larger depth is connected to the grease injection channel 11 and faces the right end of the grease injection shell 1.

[0090] As one of the specific installation methods, when the groove bottom of the limiting groove 12 is close to the center axis of the grease injection shell 1 (not shown in the figure) relative to the right end inner tooth of the grease injection shell 1, the sealing assembly 3 and each toothed plate 61 can be inserted into the grease injection channel 11 from right to left at the same time, and the installation is completed.

[0091] As the second specific installation method, the length of the end of the limiting groove 12 connected to the grease injection channel 11 is greater than the length of the toothed plate 61, so that the toothed plate 61 is inserted into the limiting groove 12 separately. After the toothed plate 61 is installed in place, the toothed plate 61 can be fixed to the piston 31 of the sealing assembly 3.

[0092] As a specific solution of the above embodiment, a rotating hole 13 is also formed in the grease injection shell 1 to communicate with the limiting groove 12, so as to rotate and install the fine adjustment toothed disc 62 (the fine adjustment toothed disc 62 is coaxially fixed with a shaft rod rotatingly connected to the grease injection shell 1).

[0093] On the basis of the above embodiment, a driving hole is formed through the grease injection shell 1.

[0094] As one of the driving methods, a driving rod 63 is inserted into the driving hole. One end of the driving rod 63 is inserted into the driving hole and coaxially fixed (key connection) to the fine adjustment toothed disc 62, and the other end extends out of the driving hole, so as to rotate the fine adjustment toothed disc 62 by holding and rotating the driving rod 63.

[0095] As the second driving method, the driving can also be performed by a motor (not shown in the figure).

[0096] As Figure 2On the basis of the above embodiment, a connecting sleeve 5 is coaxially rotatably connected to one end (the right end) of the piston 31, and the connecting sleeve 5 is annular to allow the liquid to pass through.

[0097] Specifically, when the two ends of the spring 22 are fixedly connected to the connecting block 21 and the piston 31 respectively, the connecting block 21 is rotated, and the connecting sleeve 5 is rotated under the transmission of the spring 22.

[0098] When at least one end of the spring 22 only abuts against the connecting block 21 or the piston 31, the connecting sleeve 5 can be rotated under the transmission of the friction and the spring 22.

[0099] The working principle of the grease injection extension joint provided by the utility model is as follows:

[0100] When the inside of the grease injection shell 1 is fixed, the micro-adjustment tooth disc 62 can be first rotated to drive the toothed plate 61 to slide forward and backward, so that the piston 31 slides in the inside of the grease injection shell 1 to be readjusted and reset, and the disassembly and replacement are reduced.

[0101] Compared with the related art, the grease injection extension joint provided by the utility model has the following beneficial effects:

[0102] The utility model provides a kind of grease injection extension joint, when spring 22 winding or inside impurity causes piston 31 to be stuck, can first by rotating micro-adjustment tooth disc 62, toothed plate 61 can drive piston 31 Sliding in the inside of grease injection shell 1, by readjusting spring 22 to reset, reduce the disassembly and replacement frequency of sealing assembly 3.

[0103] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0104] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" or "third" can include, explicitly or implicitly, at least one of such features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0105] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0106] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0107] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.

[0108] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A grease injection extension connector, comprising a grease injection shell (1), wherein the grease injection shell (1) has a through-hole grease injection channel (11), characterized in that, The two ends of the grease injection channel (11) are respectively threaded with a check assembly (2) and a connecting assembly (4), and a sealing assembly (3) is slidably connected inside the grease injection channel (11). The check assembly (2) has a through-hole grease outlet channel (211) that communicates with the grease injection channel (11). The connecting assembly (4) has a through-hole grease inlet channel (411) that communicates with the grease injection channel (11). The sealing assembly (3) has a grease delivery channel that communicates with both the grease injection channel (11) and the grease inlet channel (411). One end of the sealing assembly (3) is connected to the check assembly (2). The sealing assembly (3) is pushed by the check assembly (2) to the other end to block the grease inlet channel (411) or moved to the other end to open the grease inlet channel (411).

2. The grease injection extension joint according to claim 1, characterized in that, The check valve assembly (2) includes a connecting block (21) threaded to the grease injection channel (11) and a spring (22) connected to the connecting block (21) at one end. The grease outlet channel (211) is opened through the connecting block (21), and the other end of the spring (22) is connected to the sealing assembly (3).

3. The grease injection extension joint according to claim 1, characterized in that, The sealing assembly (3) includes a piston (31) that is slidably connected to the grease injection channel (11) at one end, the grease delivery channel is opened in the piston (31), one end of the piston (31) is connected to the check assembly (2), and the other end blocks or opens the grease inlet channel (411).

4. The grease injection extension joint according to claim 3, characterized in that, The sealing assembly (3) further includes a sealing ring (32) fixed to the other end of the piston (31), and the sealing ring (32) abuts against or moves away from the grease inlet channel (411).

5. The grease injection extension joint according to claim 3, characterized in that, The other end of the piston (31) extends into the grease inlet channel (411), and its side abuts against or separates from the inner wall of the grease inlet channel (411), and both sides are fitted with inclined structures.

6. The grease injection extension joint according to claim 1, characterized in that, The connecting assembly (4) includes a connecting seat (41) with one end threaded to the inner wall of the grease injection channel (11), and the grease injection channel (411) is opened through the connecting seat (41).

7. The grease injection extension joint according to claim 6, characterized in that, The connecting assembly (4) further includes a sealing sleeve (42) sleeved outside the connecting seat (41), the sealing sleeve (42) abutting against the inner wall of the grease inlet channel (411).

8. A grease injection extension joint according to any one of claims 1-7, characterized in that, The grease delivery channel includes a grease outlet (33) on the side wall of the sealing assembly (3) and a through hole (34) at one end of the sealing assembly (3). One end of the grease outlet (33) is connected to the grease injection channel (11), and the other end is connected to one end of the through hole (34). The other end of the through hole (34) passes through the end of the sealing assembly (3) facing the check valve assembly (2) to communicate with the grease injection channel (11).

9. The grease injection extension joint according to claim 8, characterized in that, One end of the sealing component (3) is slidably connected to the inner wall of the grease injection channel (11), and the other end of the sealing component (3) has a gap relative to the inner wall of the grease injection channel (11). The grease outlet (33) is opened at both ends of the sealing component (3).

10. A grease injection extension joint according to any one of claims 1-7, characterized in that, The grease injection shell (1) is equipped with a fine-tuning component (6), which includes a toothed plate (61) fixedly connected to the outer wall of the sealing component (3) and a fine-tuning toothed disc (62) meshing with the toothed plate (61). The toothed plate (61) is slidably connected to the grease injection shell (1) along the sliding direction of the sealing component (3), and the fine-tuning toothed disc (62) is rotatably connected to the grease injection shell (1).

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