Exhaust valve assembly with automatic pressure relief function

Abstract

The utility model discloses an exhaust valve assembly with an automatic pressure relief function, which comprises an exhaust valve main body, and a pressure limiting pipeline is arranged on the exhaust valve main body in a penetrating manner; the pressure release valve mechanism is adjustably arranged in the exhaust valve main body in a sealing manner and comprises a pressure release valve main body which is detachably arranged on the exhaust valve main body and can be in contact sealing communication connection with the pressure limiting pipeline, and a pressure release pipeline is arranged on the pressure release valve main body in a penetrating manner; the connecting piece is detachably connected to the pressure release valve main body; the pressure relief valve core is movably arranged in the pressure relief valve main body and can be in sealing contact connection with the pressure relief pipeline; and the elastic piece is arranged on the connecting piece and is connected with the pressure release valve core. Pressing force is applied to the pressure relief valve element through the elastic piece, when the air pressure in the grease gun is larger than the pressing force, the elastic piece is compressed upwards, meanwhile, the pressure relief valve element moves upwards, sealing connection with the pressure relief pipeline is separated, and therefore the automatic pressure relief function is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to exhaust valve technical field, especially exhaust valve assembly with automatic pressure relief function. BACKGROUND

[0002] The grease gun can be used for lubricating and rust-proofing on motor vehicles and production lines, and has the advantages of small size, light weight, easy use and carrying. Air cannot exist in the grease gun barrel, otherwise it is difficult to squeeze out the lubricating grease, so an exhaust port needs to be arranged on the grease gun for exhaust. Although the exhaust valve in the prior art can realize manual exhaust function, it generally does not have automatic pressure relief function. Therefore, the exhaust valve assembly with automatic pressure relief function is provided to solve the above problems. SUMMARY

[0003] One of the purposes of the utility model is to provide an exhaust valve assembly with automatic pressure relief function, so as to solve the problem that the existing grease gun does not have automatic pressure relief function.

[0004] The exhaust valve assembly with automatic pressure relief function can be realized through the following technical solutions:

[0005] The exhaust valve assembly with automatic pressure relief function is applied to the grease gun, which comprises an exhaust valve body, which is a hollow cavity, and a pressure limiting pipeline is arranged through the exhaust valve body; a pressure relief valve mechanism is adjustably and sealingly arranged in the exhaust valve body, and the pressure relief valve mechanism can seal the pressure limiting pipeline;

[0006] The pressure relief valve mechanism comprises a pressure relief valve body, which is a hollow cavity, and the pressure relief valve body is detachably arranged on the exhaust valve body and can be in sealing and communicating connection with the pressure limiting pipeline; a connecting piece is detachably connected to the pressure relief valve body; a pressure relief valve core is movably arranged in the pressure relief valve body and can be in sealing and contacting connection with the pressure relief pipeline; an elastic piece is arranged between the connecting piece and the pressure relief valve core, and the elastic piece provides a pressing force to the pressure relief valve core, so that the pressure relief valve core is sealingly and contacting connected to the pressure relief pipeline.

[0007] In one embodiment, the exhaust valve body comprises an exhaust valve cavity, which is a hollow cavity, and one end of the pressure relief valve body is detachably arranged in the exhaust valve cavity; a connecting head is integrally and communicatively arranged on one side of the exhaust valve cavity, and the connecting head is detachably connected to the exhaust port of the grease gun.

[0008] In one of the embodiments, the exhaust valve cavity is provided with an exhaust hole; and the pressure relief valve body is provided with a pressure relief hole.

[0009] In one of the embodiments, the exhaust valve cavity is provided with a first internal thread; and the pressure relief valve body is provided with a second external thread, which is detachably threadedly connected with the first internal thread.

[0010] In one of the embodiments, the pressure relief valve body is provided with a sealing head at the part in contact with the pressure limiting pipeline, which is elastic and capable of extending into the pressure limiting pipeline.

[0011] In one of the embodiments, the pressure relief valve body is provided with a second internal thread; and the connecting member is provided with a third external thread, which is detachably threadedly connected with the second internal thread.

[0012] In one of the embodiments, the pressure relief valve body is provided with a stripe around the outer side of the upper end.

[0013] In one of the embodiments, the connecting member is a screw provided with a screw head.

[0014] In one of the embodiments, the pressure relief valve core comprises a connecting rod movably arranged in the pressure relief valve body and extending through the elastic member; and a valve core body fixedly arranged at one side of the connecting rod, which is capable of sealingly and contactingly connected with the pressure limiting pipeline.

[0015] In one of the embodiments, the head of the valve core body is conical and elastic.

[0016] Compared with the prior art, the exhaust valve assembly with automatic pressure relief function has the following advantages:

[0017] The exhaust valve assembly with automatic pressure relief function provides a compression force for the pressure relief valve core through the elastic member. When the air pressure in the grease gun is greater than the compression force, the elastic member is compressed upward and the pressure relief valve core is also moved upward, thereby separating the sealing connection with the pressure limiting pipeline, so as to realize the function of automatic pressure relief. The problem that the existing grease gun does not have the function of automatic pressure relief is effectively solved. When manual exhaust of the grease gun is needed, the pressure relief valve mechanism is screwed to separate the sealing connection with the pressure limiting pipeline, so as to realize the manual exhaust operation. At the same time, the position of the connecting member on the pressure relief valve body is adjusted, so as to adjust the size of the compression force of the elastic member for the pressure relief valve core. The user can perform corresponding adjustment operation according to the actual demand. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0019] Figure 1 is a structural schematic diagram of a kind of exhaust valve assembly with automatic pressure relief function of the present application;

[0020] Figure 2 is Figure 1 the sectional structure schematic diagram of the present application shown in a kind of exhaust valve assembly with automatic pressure relief function;

[0021] Figure 3 is Figure 1 the explosion structure schematic diagram of the present application shown in a kind of exhaust valve assembly with automatic pressure relief function, including exhaust valve main body and pressure relief valve main body;

[0022] Figure 4 is Figure 3 the sectional structure schematic diagram of the exhaust valve main body shown in;

[0023] Figure 5 is Figure 3 the sectional structure schematic diagram of the pressure relief valve main body shown in.

[0024] In the drawing, it is indicated: 10, exhaust valve assembly;11, exhaust valve main body;111, exhaust valve cavity;1111, exhaust hole;1112, first internal thread;112, connecting head;1121, pressure-limiting pipeline;1122, first external thread;12, pressure relief valve mechanism;121, pressure relief valve main body;1211, sealing head;1212, pressure relief pipeline;1213, pressure relief hole;1214, second external thread;1215, second internal thread;1216, stripe;122, connecting piece;1221, third external thread;1222, screw head;123, pressure relief valve core;1231, connecting rod;1232, valve core main body;124, elastic member. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantage of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below by combining with the drawings in the embodiments of the present application. Obviously, the described embodiments are one part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] The following detailed description of embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but merely represents selected embodiments of the application. Based upon the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the application.

[0027] Referring to Figures 1-3 The utility model discloses a kind of exhaust valve assemblies 10 with automatic pressure relief function, mainly applied to grease gun, it includes exhaust valve main body 11 and pressure relief valve mechanism 12;Exhaust valve main body 11 is hollow cavity, it is detachably connected and arranged in the exhaust port of grease gun;Pressure relief valve mechanism 12 is adjustably sealed and arranged in exhaust valve main body 11, it can seal operation to exhaust valve main body 11, when the pressure in grease gun is greater than a certain preset value, gas in grease gun is sequentially automatically pressure-relieved by exhaust valve main body 11, pressure relief valve mechanism 12.

[0028] Referring to Figures 1-4 In the embodiment, exhaust valve main body 11 includes exhaust valve cavity 111 and connecting head 112;Exhaust valve cavity 111 is hollow cavity, one end of pressure relief valve mechanism 12 is detachably arranged in exhaust valve cavity 111;Connecting head 112 is integrally formed and communicated and arranged on one side of exhaust valve cavity 111, and it is detachably connected to the exhaust port of grease gun.Specifically, exhaust valve cavity 111 is provided with exhaust hole 1111, and the gas in exhaust valve cavity 111 is discharged to the outside atmosphere through exhaust hole 1111;First internal thread 1112 is arranged on the inner wall of exhaust valve cavity 111, and pressure relief valve mechanism 12 is detachably screwed in exhaust valve cavity 111 through first internal thread 1112;Pressure limiting pipeline 1121 is arranged in connecting head 112, and the gas in grease gun is sequentially exhausted into exhaust valve cavity 111 or pressure relief valve mechanism 12 through the exhaust port of grease gun, pressure limiting pipeline 1121, and pressure relief valve mechanism 12 can seal the operation of pressure limiting pipeline 1121;First external thread 1122 is arranged on the outer side of connecting head 112, and connecting head 112 is detachably screwed to the exhaust port of grease gun through first external thread 1122.

[0029] Referring to Figure 2 And Figure 3As shown, in the embodiment, the pressure relief valve mechanism 12 comprises a pressure relief valve body 121, a connecting piece 122, a pressure relief valve core 123 and an elastic piece 124; the pressure relief valve body 121 is a hollow cavity, which is detachably arranged on the exhaust valve body 11 and can be in contact and sealed communication connection with the pressure limiting pipeline 1121; the connecting piece 122 is detachably connected on the pressure relief valve body 121; the pressure relief valve core 123 is movably arranged in the pressure relief valve body 121 and can seal the connecting part of the pressure relief valve body 121 and the pressure limiting pipeline 1121; one end of the elastic piece 124 is connected with the connecting piece 122, and the other end is connected with the pressure relief valve core 123; the elastic piece 124 provides a compression force for the pressure relief valve core 123, so that the pressure relief valve core 123 is sealingly arranged on the connecting part of the pressure relief valve body 121 and the pressure limiting pipeline 1121; by adjusting the position of the connecting piece 122 on the pressure relief valve body 121, the compression force of the elastic piece 124 on the pressure relief valve core 123 is adjusted. Specifically, the elastic piece 124 is a spring.

[0030] As shown in Figure 2 , Figure 3 and Figure 5 , in the embodiment, the part of the pressure relief valve body 121 in contact with the pressure limiting pipeline 1121 is provided with a sealing head 1211, which has elasticity; the sealing head 1211 can extend into the pressure limiting pipeline 1121, so that the pressure relief valve body 121 is in contact and sealed communication connection with the pressure limiting pipeline 1121, effectively preventing the gas in the pressure limiting pipeline 1121 from leaking from the contact part of the sealing head 1211 and the pressure limiting pipeline 1121; a pressure relief pipeline 1212 is arranged through the sealing head 1211, and the position of the pressure relief pipeline 1212 corresponds to the position of the pressure limiting pipeline 1121, so that the gas in the grease gun passes through the pressure limiting pipeline 1121 and the pressure relief pipeline 1212 into the pressure relief valve body 121 in sequence; a pressure relief hole 1213 is arranged through the pressure relief valve body 121; the gas in the pressure relief valve body 121 is discharged to the outside atmosphere through the pressure relief hole 1213; the upper and lower ends of the pressure relief valve body 121 are respectively provided with a second external thread 1214 and a second internal thread 1215; the second external thread 1214 is detachably threadedly connected with the first internal thread 1112, so that the pressure relief valve body 121 can be adjustably arranged on the exhaust valve body 11; the connecting piece 122 is detachably threadedly connected on the pressure relief valve body 121 through the second internal thread 1215; a stripe 1216 is arranged around the outside of the upper end of the pressure relief valve body 121; the friction between the user's fingers and the pressure relief valve body 121 is increased through the stripe 1216, so as to facilitate the user to manually screw and adjust the pressure relief valve body 121.

[0031] As shown in Figure 2 and Figure 3As shown, in the embodiment, the connecting piece 122 adopts a screw, an outer side of which is provided with a third external thread 1221, which is detachably threadedly connected with the second internal thread 1215, so as to fix the connecting piece 122 on the pressure relief valve body 121; the connecting piece 122 is further provided with a screw head 1221, through which the connecting piece 122 is conveniently screwed on the pressure relief valve body 121. In the embodiment, the pressure relief valve core 123 comprises a connecting rod 1231 and a valve core body 1232, the connecting rod 1231 is movably arranged in the pressure relief valve body 121 and penetrates through the elastic piece 124; the valve core body 1232 is fixedly arranged on one side of the connecting rod 1231 and can be in sealing contact with the pressure relief pipeline 1212, one end of the elastic piece 124 is in contact with the valve core body 1232; specifically, the head of the valve core body 1232 is conical in shape and has elasticity, which facilitates the sealing operation of the pressure relief pipeline 1212; preferably, the material of the valve core body 1232 is silica gel.

[0032] It should be noted that the specific working process of the exhaust valve assembly with automatic pressure relief function is as follows: when it is necessary to manually exhaust the grease gun, the pressure relief valve mechanism 12 is screwed to make the pressure relief valve mechanism 12 disengage from the sealing connection with the pressure limiting pipeline 1121, so that the gas in the grease gun is sequentially discharged to the outside air through the grease gun exhaust port, the pressure limiting pipeline 1121, the exhaust hole 1111; when the gas pressure in the grease gun is greater than the compression force of the elastic piece 124 on the pressure relief valve core 123, the elastic piece 124 is compressed upward, and the pressure relief valve core 123 also moves upward, so as to disengage from the sealing connection with the pressure relief pipeline 1212, and the gas in the grease gun is sequentially discharged to the outside air through the grease gun exhaust port, the pressure limiting pipeline 1121, the pressure relief pipeline 1212 and the pressure relief hole 1213, thereby realizing automatic pressure relief operation; when the gas pressure in the grease gun is less than the compression force of the elastic piece 124 on the pressure relief valve core 123, the compression force of the elastic piece 124 on the pressure relief valve core 123 makes the pressure relief valve core 123 sealingly connected with the pressure relief pipeline 1212, thereby realizing the sealing operation of the grease gun exhaust port; at the same time, the position of the connecting piece 122 on the pressure relief valve body 121 can be adjusted, so as to adjust the compression force of the elastic piece 124 on the pressure relief valve core 123.

[0033] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, not all possible combinations of the technical features in the embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0034] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A vent valve assembly with automatic pressure relief function, applied to a grease gun, characterized in that, The utility model relates to a pressure relief valve mechanism of grease gun, including: Exhaust valve body is hollow cavity, and limited pressure pipeline is arranged on exhaust valve body; Pressure relief valve mechanism is adjustably sealed and arranged in exhaust valve body, and pressure relief valve mechanism can seal operation to limited pressure pipeline; Wherein, the pressure relief valve mechanism includes pressure relief valve body, which is hollow cavity, and the pressure relief valve body is detachably arranged on the exhaust valve body and can be in contact with the limited pressure pipeline Seal communication connection, a pressure relief pipeline is arranged through the pressure relief valve body, and the position of the pressure relief pipeline corresponds to the position of the limited pressure pipeline; The connecting piece is detachably connected to the pressure relief valve body; The pressure relief valve core is movably arranged in the pressure relief valve body and can be in sealing contact with the pressure relief pipeline; The elastic member is arranged between the connecting piece and the pressure relief valve core, and the elastic member provides a compression force to the pressure relief valve core, so that the pressure relief valve core is in sealing contact with the pressure relief pipeline.

2. The vent valve assembly with automatic pressure relief function according to claim 1, characterized in that, The exhaust valve body includes an exhaust valve cavity, which is a hollow cavity, and one end of the pressure relief valve body is detachably arranged in the exhaust valve cavity; The connecting head is integrally formed and communicated on one side of the exhaust valve cavity and is detachably connected to the exhaust port of the grease gun.

3. The vent valve assembly with automatic pressure relief function of claim 2, wherein, An exhaust hole is arranged through the exhaust valve cavity; and a pressure relief hole is arranged through the pressure relief valve body.

4. The vent valve assembly with automatic pressure relief function of claim 2, wherein, A first internal thread is arranged on the inner wall of the exhaust valve cavity; a second external thread is arranged on the pressure relief valve body, and the second external thread is detachably threadedly connected with the first internal thread.

5. The vent valve assembly with automatic pressure relief function of claim 1, wherein, The part of the pressure relief valve body in contact with the limited pressure pipeline is provided with a sealing head having elasticity, and the sealing head can extend into the limited pressure pipeline.

6. The vent valve assembly with automatic pressure relief function of claim 1, wherein, A second internal thread is arranged on the pressure relief valve body; a third external thread is arranged on the outer side of the connecting piece, and the third external thread is detachably threadedly connected with the second internal thread.

7. The vent valve assembly with automatic pressure relief function of claim 1, wherein, A stripe is arranged around the upper end of the pressure relief valve body.

8. The vent valve assembly with automatic pressure relief function of claim 1, wherein, The connecting piece is a screw provided with a screw head.

9. The pressure relief valve assembly of any of claims 1-8, wherein, The pressure relief valve core includes a connecting rod movably arranged in the pressure relief valve body and arranged through the elastic member; and a valve core body fixedly arranged on one side of the connecting rod and capable of being in sealing contact with the pressure relief pipeline.

10. The vent valve assembly with automatic pressure relief function of claim 9, wherein, The head of the valve core body is conical and has elasticity.

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