CN213575755U

CN213575755U - Split safety valve

Info

Publication number: CN213575755U
Application number: CN202021771625.5U
Authority: CN
Inventors: 王东升; 王瑞平; 张晓北
Original assignee: Beijing Cmrc Science & Technology Development Co ltd
Current assignee: Beijing Cmrc Science & Technology Development Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-06-29
Anticipated expiration: 2030-08-21

Abstract

The utility model discloses a split safety valve, which comprises an upper shell (10), a lower shell (20) and a plugging mechanism; the upper shell (10) is provided with a first oil drainage flow passage (11), and the first oil drainage flow passage (11) is used for discharging oil to the outside; the lower shell (20) is provided with a second oil drainage flow passage (21), and the second oil drainage flow passage (21) is used for receiving external oil; the upper casing (10) is detachably connected with the lower casing (20) to communicate the first drain flow passage (11) and the second drain flow passage (21); the blocking mechanism is configured to be capable of switching between a blocking state of blocking the second drainage flow passage (21) and a conducting state of conducting the second drainage flow passage (21). The utility model discloses a holistic size of split type relief valve is less, can be applicable to the use occasion of small-size plunger pump.

Description

Split safety valve

Technical Field

The utility model relates to a relief valve technical field specifically relates to a split type relief valve.

Background

At present, prior art's relief valve comprises valve body, valve rod, pressure regulating spring, pressure regulating hand wheel usually, and the general design of relief valve is overall structure, and its oil inlet sets up on same valve body with the draining mouth, because the form of its pressure regulating part adoption screw rod or hand wheel for the whole overall dimension of relief valve is great relatively, can't satisfy the use occasion of small-size plunger pump.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the problem that prior art exists, providing a split type relief valve, this split type relief valve is holistic size is less, can be applicable to the use occasion of small-size plunger pump.

In order to achieve the above object, the present invention provides a split safety valve, which comprises an upper casing, a lower casing and a plugging mechanism; the upper shell is provided with a first oil drainage channel which is used for discharging oil to the outside; the lower shell is provided with a second oil drainage channel which is used for receiving external oil; the upper shell is detachably connected with the lower shell so as to communicate the first oil drainage channel with the second oil drainage channel; the blocking mechanism is configured to be capable of switching between a blocking state of blocking the second oil drainage flow passage and a conducting state of conducting the second oil drainage flow passage.

Optionally, the upper housing and the lower housing are connected through threads.

Optionally, the lower extreme of casing is equipped with the connector that is used for with outside pipe connection down, the connector with the second draining runner intercommunication.

Optionally, the second draining runner is close to one end of the connector is a conical cavity, the plugging mechanism comprises a valve core and a plugging piece, the shape of the plugging piece is matched with the conical cavity, the valve core is connected with the plugging piece, and the valve core can move in a reciprocating manner along the length direction of the second draining runner to plug or conduct the plugging piece to the conical cavity.

Optionally, the split safety valve includes a pressing member and a spring, the pressing member is disposed in the first oil drainage channel, one end of the spring abuts against the pressing member, and the other end of the spring abuts against the valve core.

Optionally, the inner wall of the first oil drainage channel is provided with an internal thread, and the jacking member is provided with an external thread matched with the internal thread.

Optionally, the pressing member is provided with an oil drainage port for providing fluid communication between the outside and the first oil drainage channel.

Optionally, a groove matched with the screwdriver is formed in the top of the jacking part, and the oil drainage port is formed in the center of the groove.

Optionally, the closure is a spherical structure, and the conical chamber has a sealing surface matching the spherical structure.

Optionally, one end of the valve core close to the plugging piece is provided with a curved surface matched with the spherical structure.

Through the technical scheme, the upper shell is detachably connected with the lower shell so as to communicate the first oil drainage channel with the second oil drainage channel, and the blocking mechanism can be switched between a blocking state for blocking the second oil drainage channel and a conducting state for conducting the second oil drainage channel. When the split safety valve needs to be decompressed, the blocking mechanism is switched to be in a conducting state, oil can be discharged to the outside through the second oil drainage flow channel and the first oil drainage flow channel, when the decompression is not needed, the blocking mechanism is switched to be in a blocking state, and external oil cannot enter the second oil drainage flow channel. Because the utility model discloses a split type safety go up the casing with casing detachably connects down, consequently convenient transportation and assembly use occasion is wider.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

Fig. 1 is a schematic view of the internal structure of the split safety valve of the present invention, wherein the plugging mechanism is in a plugging state;

fig. 2 is a schematic view of the internal structure of the split safety valve of the present invention, wherein the blocking mechanism is in a conducting state;

fig. 3 is a schematic structural diagram of the top pressure member of the split safety valve of the present invention.

Description of the reference numerals

10-upper shell, 11-first oil drainage channel, 20-lower shell, 21-second oil drainage channel, 22-connector, 31-valve core, 32-blocking piece, 40-top pressing piece, 41-oil drainage port, 42-groove and 50-spring

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

As shown in fig. 1 to 3, the safety valve of the present invention comprises an upper housing 10, a lower housing 20 and a plugging mechanism; the upper shell 10 is provided with a first oil drainage channel 11, and the first oil drainage channel 11 is used for discharging oil to the outside; the lower shell 20 is provided with a second oil drainage flow passage 21, and the second oil drainage flow passage 21 is used for receiving external oil; the upper casing 10 is detachably connected to the lower casing 20 to communicate the first drain flow passage 11 with the second drain flow passage 21; the blocking mechanism is configured to be capable of switching between a blocking state of blocking the second drain flow path 21 and a conducting state of conducting the second drain flow path 21.

The utility model discloses in, go up casing 10 with casing 20 detachably connects in order with down first draining runner 11 with second draining runner 21 intercommunication, shutoff mechanism can be in the shutoff state of second draining runner 21 switches over between the on-state of second draining runner 21. When the split safety valve needs to be decompressed, the blocking mechanism is switched to be in a conducting state, oil can be discharged to the outside through the second oil drainage flow passage 21 and the first oil drainage flow passage 11, when the decompression is not needed, the blocking mechanism is switched to be in a blocking state, and the external oil cannot enter the second oil drainage flow passage 21. Because the utility model discloses a split type safety go up casing 10 with casing 20 detachably connects down, consequently convenient transportation and assembly, the use occasion is wider.

It should be understood that the upper housing 10 and the lower housing 20 can be detachably connected in various forms, such as a snap-fit form. In order to facilitate the connection between the upper housing 10 and the lower housing 20 and reduce the manufacturing cost, in an embodiment of the present invention, the upper housing 10 and the lower housing 20 are connected by a screw thread.

In order to facilitate outside pipeline to second draining runner 21 carries fluid the utility model discloses an in an embodiment, the lower extreme of casing 20 is equipped with the connector 22 that is used for with outside tube coupling down, connector 22 with second draining runner 21 intercommunication, connector 22 can adopt the quick-operation joint form of e.g. threaded connection head.

It should be understood that the occlusion mechanism may be designed in various forms as long as it can be switched between an occluding state and a conducting state. The utility model discloses an in an embodiment, shutoff mechanism includes case 31 and shutoff piece 32, second draining runner 21 is close to the one end of connector 22 is the toper cavity, shutoff piece 32 the shape with toper cavity phase-match, case 31 with shutoff piece 32 is connected, case 31 can follow the length direction reciprocating motion of second draining runner 21 is so that shutoff piece 32 shutoff or switch on the toper cavity. Because the valve core 31 reciprocates along the length direction of the second oil drainage flow passage 21, the occupied space is not additionally increased, and therefore the split safety valve of the utility model can keep smaller size.

In the prior art, the valve core 31 can be driven to move in various ways, for example, a screw or a hand wheel is adopted, but the screw and the hand wheel need manual operation, so that the labor is not saved and the time is not timely enough. In order to make the pressure release action of split type relief valve more laborsaving, rapider the utility model discloses an embodiment, split type relief valve is including still roof pressure piece 40 and spring 50, roof pressure piece 40 sets up in the first draining runner 11, spring 50's one end support lean on in roof pressure piece 40, the other end support lean on in case 31. In the blocking state, as shown in fig. 1, the spring 50 provides a downward pushing force to the valve core 31 through the pressing member 40, so that the valve core 31 pushes the blocking member 32 to block the conical chamber. When the pressure of the external oil exceeds the thrust of the spring 50, as shown in fig. 2, the oil pushes the blocking piece 32 upwards, the blocking piece 32 drives the valve element 31 to extrude the spring 50 upwards, and at this time, the blocking piece 32 cannot block the conical cavity, so that the conical cavity is communicated with the external oil, the oil enters the second oil drainage channel 21, and the whole blocking mechanism is in a conducting state. When the pressure of the external oil is reduced to be smaller than the thrust of the spring 50, the valve element 31 drives the blocking piece 32 to move downwards under the action of the thrust of the spring 50 again, and finally the blocking piece 32 blocks the conical cavity, and the blocking mechanism enters a blocking state again.

In the prior art, the pressure is regulated by adopting a screw rod or a hand wheel, and the volume of the screw rod and the hand wheel is larger, so that the whole volume of the safety valve is larger. In order to solve the problem, in an embodiment of the present invention, the inner wall of the first oil drainage channel 11 is provided with an internal thread, and the top pressing member 40 is provided with an external thread matched with the internal thread. That is, the pressing member 40 can be moved back and forth along the length direction of the first oil drainage channel 11 by rotating the pressing member 40, so as to achieve the purpose of adjusting the pressure on the spring 50, compared with the prior art screw or hand wheel, the pressing member 40 has a smaller volume, and the whole pressing member 40 can be arranged in the first oil drainage channel 11 without extending out of the upper housing 10, so that the overall volume of the split safety valve is kept in a smaller state.

Further, as shown in fig. 3, the pressing member 40 may be provided with a drain port 41 providing fluid communication between the outside and the first drain passage 11, so that the oil in the first drain passage 11 can be drained from the drain port 41 to the outside without removing the pressing member 40.

In order to facilitate the rotation top pressure piece 40, in an embodiment of the present invention, the top of top pressure piece 40 is equipped with the slot 42 adapted with the screwdriver, and simultaneously, oil drainage port 41 is arranged at the center of slot 42, thereby ensuring that the oil pressure in first oil drainage channel 11 is balanced.

It should be understood that the closure member 32 may be designed in various forms as long as it can close or open the tapered chamber. In one embodiment of the present invention, the plugging member 32 is a spherical structure, and the conical chamber has a sealing surface matched with the spherical structure.

In addition, in order to enable the valve element 31 to push the blocking piece 32 more smoothly, one end of the valve element 31 close to the blocking piece 32 is provided with a curved surface matched with the spherical structure.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide a solution of the present invention with a plurality of simple modifications to avoid unnecessary repetition, and the present invention is not described separately for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. The split safety valve is characterized by comprising an upper shell (10), a lower shell (20) and a plugging mechanism;

the upper shell (10) is provided with a first oil drainage flow passage (11), and the first oil drainage flow passage (11) is used for discharging oil to the outside;

the lower shell (20) is provided with a second oil drainage flow passage (21), and the second oil drainage flow passage (21) is used for receiving external oil;

the upper casing (10) is detachably connected with the lower casing (20) to communicate the first drain flow passage (11) and the second drain flow passage (21);

the blocking mechanism is configured to be capable of switching between a blocking state of blocking the second drainage flow passage (21) and a conducting state of conducting the second drainage flow passage (21).

2. The safety relief valve according to claim 1, characterized in that the upper housing (10) is screwed to the lower housing (20).

3. The safety valve according to claim 1, wherein the lower end of the lower casing (20) is provided with a connector (22) for connecting with an external pipeline, and the connector (22) is communicated with the second oil drainage channel (21).

4. The safety valve assembly of claim 3, wherein the end of the second oil drainage channel (21) close to the connector (22) is a conical chamber, the blocking mechanism comprises a valve core (31) and a blocking piece (32), the shape of the blocking piece (32) is matched with that of the conical chamber, the valve core (31) is connected with the blocking piece (32), and the valve core (31) can move back and forth along the length direction of the second oil drainage channel (21) to block or conduct the conical chamber through the blocking piece (32).

5. The safety valve according to claim 4, wherein the safety valve comprises a pressing member (40) and a spring (50), the pressing member (40) is arranged in the first oil drainage channel (11), one end of the spring (50) abuts against the pressing member (40), and the other end abuts against the valve core (31).

6. The safety valve assembly according to claim 5, wherein the inner wall of the first oil drainage channel (11) is provided with an internal thread, and the top pressure member (40) is provided with an external thread matched with the internal thread.

7. The safety valve according to claim 6, wherein the pressure element (40) is provided with a drain opening (41) providing a fluid connection between the environment and the first drain duct (11).

8. The safety valve according to claim 7, wherein the top of the top pressure member (40) is provided with a groove (42) matched with a screwdriver, and the oil drainage port (41) is arranged at the center of the groove (42).

9. The safety vent of any one of claims 4 to 8, wherein the closure member (32) is a spherical structure and the conical chamber has a sealing surface that mates with the spherical structure.

10. The safety valve according to claim 9, characterized in that the valve core (31) has a curved surface matching the spherical structure at its end close to the blocking piece (32).