CN201786785U - Hydraulic Sequence Valve - Google Patents

Abstract

The utility model relates to a sequence valve, in particular to an oil pressure sequence valve. The oil pressure sequence valve includes: the valve comprises a valve body, wherein an oil inlet, a valve core cavity, a one-way valve cavity and an oil outlet are arranged on the valve body, the oil inlet is communicated with the oil outlet through the valve core cavity, and a valve core is arranged in the valve core cavity; the oil inlet is communicated with the oil outlet through the check valve cavity, a check valve is arranged in the check valve cavity, an oil path of the oil inlet flowing to the oil outlet is closed through the check valve, a valve core head for closing the oil path of the oil inlet flowing to the oil outlet is formed at the bottom end of the valve core, and the oil path of the oil inlet flowing to the oil outlet is closed through the valve core head. The utility model provides a case head can close the oil circuit of oil inlet flow direction oil-out totally sealed, can not lead to the hydraulic oil seepage, and then can use another hydraulic sequence valve with the hydraulic oil confession of oil-out. The utility model discloses the pressure range who uses can not receive the restriction, need not to change the spring, and high-low pressure occasion is general, and it is very convenient to use.

Description

Hydraulic Sequence Valve

Technical field:

The utility model relates to a sequence valve, in particular to an oil pressure sequence valve.

Background technique:

At present, the hydraulic fixture system is usually composed of two or more oil cylinders. In some specific processing, sometimes it is necessary to move one oil cylinder first and then move the other to prevent deformation and confirmation of the workpiece. Accurate seating of the workpiece during positioning. In sequence control, it can also be completed by circuit control, but it is more cumbersome in production and control, and the cost is higher, so it cannot meet the needs of the market.

In view of this, various sequence valves have appeared on the market, and the sequence valve is a control element in a hydraulic device that relies on the pressure of the transmission medium to achieve its sequence. It is widely used in various hydraulic transmission mechanical products. A traditional sequential valve includes: a valve body, which is provided with an oil inlet, a spool chamber, a one-way valve chamber, and an oil outlet, wherein the oil inlet communicates with the oil outlet through the one-way valve chamber, and the one-way valve There is a one-way valve in the cavity, and the oil passage from the oil inlet to the oil outlet is closed through the one-way valve; the oil inlet is connected with the oil outlet through the spool cavity, and a spool is arranged in the spool cavity, and the valve core The top end leans against the bottom end of the spring, and the bottom end of the spool leans against a steel ball that closes the oil passage from the oil inlet to the oil outlet, and the oil passage from the oil inlet to the oil outlet is closed by the steel ball. The sequence valve is large in size and unsatisfactory in function. It is directly controlled by spring pressure steel balls in structure. After adopting this control scheme, the following disadvantages will appear:

1. During the working process, the pressure at the oil inlet will change. Due to structural defects, the pressure at the oil outlet will fluctuate, resulting in the load not working normally and stably.

2. The range of pressure used will also be limited, resulting in a sequence of high and low pressure, which is also troublesome in use.

3. The steel ball against the bottom of the spool cannot completely seal and close the oil passage from the oil inlet to the oil outlet, which may cause hydraulic oil leakage, that is, the hydraulic oil at the oil outlet flows to the oil inlet through the spool cavity, In turn, the hydraulic oil at the oil outlet cannot be used by another sequence valve.

4. When used in a high-pressure situation, it is necessary to press the high-pressure spring on the steel ball; when it is required to be used in a low-pressure situation, it is necessary to remove the high-pressure spring first, and then press the low-pressure spring on the steel ball. On the steel ball, such operation can lead to low work efficiency.

To sum up, there are some areas that need to be improved in the sequence valve at present, and the applicant creates and designs the utility model just for this purpose.

Utility model content:

The technical problem to be solved by the utility model is to overcome the above-mentioned deficiencies, and provide an oil pressure sequence valve which is small in size, stable in operation, capable of accurately completing sequential actions, and universal in high and low pressure applications.

In order to solve the above technical problems, the utility model adopts the following technical scheme: the oil pressure sequence valve includes: a valve body, the valve body is provided with an oil inlet, a valve core chamber, a one-way valve chamber, and an oil outlet, wherein, The oil inlet is connected with the oil outlet through the spool chamber, and a spool is arranged in the spool chamber; the oil inlet is connected with the oil outlet through the one-way valve chamber, and a one-way valve is arranged in the one-way valve chamber, and the one-way The valve closes the oil path from the oil inlet to the oil outlet, and a spool head is formed at the bottom of the spool to close the oil path from the oil inlet to the oil outlet, and the oil inlet flows to the oil outlet through the spool head. The oil circuit at the port is closed.

The oil inlet communicates with the spool chamber through the first oil passage, and the spool chamber communicates with the oil outlet through the second oil passage; the oil inlet communicates with the one-way valve chamber through the third oil passage, and the one-way valve chamber passes through the The fourth oil passage communicates with the oil outlet.

The valve body includes a body and a body cover installed on the body. The above-mentioned oil inlet, oil outlet, valve core cavity, and one-way valve cavity are respectively arranged on the body, and a first elastic member is arranged in the above-mentioned body cover; the above-mentioned A sealing cover is installed at the opening of the spool cavity, the top of the spool penetrates the sealing cover and abuts against the first elastic member, and the spool head of the spool abuts against the intersection of the first oil passage and the spool cavity.

A spring washer is installed on the top of the first elastic member, and another spring washer is installed on the bottom of the first elastic member, wherein the spring washer is fixed on the body cover, and the other spring washer is against the valve core top of the .

A seal cover O-ring is installed at the joint between the seal cover and the body.

A back support, a valve core O-ring and a gasket are installed on the sealing cover.

The one-way valve includes: a screw fixedly installed on the body, a second elastic member at the top of the screw, another washer on the top of the second elastic member, a steel ball on the other washer, and the second elastic member holds the steel ball It leans against the junction of the check valve cavity and the fourth oil passage.

The spring washer is formed with a groove for the top end of the valve core to be sleeved.

The first elastic member is a spring.

The second elastic member is a spring.

After adopting the above structure, the utility model has the following advantages:

1. During the working process, the pressure at the oil inlet will not change, the pressure at the oil outlet will not fluctuate, and the load can work normally and stably.

2. The pressure range used will not be limited, no need to replace the spring, it is suitable for high and low pressure occasions, and it is very convenient to use.

3. The spool head at the bottom of the spool can completely seal and close the oil passage from the oil inlet to the oil outlet, which will not cause hydraulic oil leakage, that is, the hydraulic oil at the oil outlet cannot flow to the oil inlet through the spool cavity. Furthermore, the hydraulic oil at the oil outlet can be used by another hydraulic sequence valve.

4. The utility model has the advantages of simple structure, convenient installation, reliable sealing, small size, low cost, sensitive action, high work efficiency, stable work, accurate sequence action, and general use in high and low voltage occasions.

Description of drawings:

Fig. 1 is a schematic diagram of the internal structure of the utility model in its initial state.

Detailed ways:

As shown in Figure 1, the utility model includes: a valve body 1, which is provided with an oil inlet A, a valve core chamber 2, a one-way valve chamber 3, and an oil outlet B.

in particular:

The above-mentioned oil inlet A communicates with the oil outlet B through the spool cavity 2, and the valve core 4 is arranged in the spool cavity 2; the oil inlet A communicates with the oil outlet B through the one-way valve cavity 3, and the one-way valve cavity 3 There is a one-way valve 5 inside, through which the oil passage from the oil inlet A to the oil outlet B is closed. The spool head 41 that closes the oil passage of B closes the oil passage that flows from the oil inlet A to the oil outlet B through the spool head 41 .

Going further:

The above-mentioned oil inlet A communicates with the spool chamber 2 through the first oil passage 6, and the spool chamber 2 communicates with the oil outlet B through the second oil passage 7; the oil inlet A communicates with the one-way valve chamber through the third oil passage 8 3, and the one-way valve cavity 3 communicates with the oil outlet B through the fourth oil passage 9.

The above-mentioned valve body 1 includes a body 11 and a body cover 12 , wherein the body cover 12 is fixed on the body 11 by hexagon socket head cap screws 013 . The oil inlet A, the oil outlet B, the valve core chamber 2, and the one-way valve chamber 3 are respectively arranged on the body 11, the body cover 12 is provided with a first elastic member 01, wherein the first elastic member 01 It consists of two springs; a sealing cover 03 is installed at the opening of the valve core cavity 2, the top end of the valve core 4 penetrates the sealing cover 03 and leans against the first elastic member 01, and the valve core head 41 of the valve core 4 leans against the The junction of the first oil passage 6 and the spool cavity 2 . A spring washer 02 is installed on the top of the first elastic member 01, and another spring washer 012 is installed on the bottom of the first elastic member 01, wherein the spring washer 02 is fixed on the body cover 12, and the other spring washer 012 against the top of the spool 4. A groove 021 for the top end of the valve core 4 is formed on the spring washer 02 .

A sealing cover 03 is installed at the opening of the spool chamber 2, the top end of the spool 4 penetrates the sealing cover 03 and abuts against the spring washer 02, and the spool head 41 abuts against the first oil passage 6 and the spool chamber 2. Junction. A sealing cover O-ring 04 is installed at the joint between the sealing cover 03 and the body 11 , the sealing cover O-ring 04 can prevent the hydraulic oil in the spool cavity 2 from entering the body cover 12 along the joint between the sealing cover 03 and the main body 11 . The sealing cover 03 is equipped with a back support 05, a spool O-ring 06 and a gasket 07, wherein the hydraulic oil in the spool O-ring 06 and the spool cavity 2 enters the body cover along the gap between the spool 4 and the sealing cover 03 within 12.

The above-mentioned one-way valve 5 includes: a screw 08 fixedly installed on the body 11, a second elastic member 09 on the top of the screw 08, another washer 010 on the top of the second elastic member 09, and a steel ball on the other washer 010 011, wherein, the second elastic member 09 is a spring, and the second elastic member 09 presses the steel ball against the intersection of the one-way valve cavity 3 and the fourth oil passage 9 .

The hydraulic oil in the oil pressure sequence valve enters from the oil inlet A and exits from the oil outlet B. When the pressure of the hydraulic oil at the oil inlet A is equal to the set value, the valve core 4 acts on the first elastic member 01 Next, the spool head 41 abuts against the junction of the first oil passage 6 and the spool chamber 2; the steel ball abuts against the junction of the one-way valve chamber 3 and the fourth oil passage 9 under the action of the second elastic member 09 ; At this time, the hydraulic oil at the oil inlet A cannot flow to the oil outlet B.

When the pressure of the hydraulic oil at the oil inlet A exceeds the set value, the spool 4 is under the action of the hydraulic oil, and the hydraulic oil lifts the spool head 41 of the spool 4, so that the spool head 41 of the spool 4 Separated from the junction of the first oil passage 6 and the spool chamber 2, the hydraulic oil at the oil inlet A flows to the spool chamber 2 through the first oil passage 6, and the hydraulic oil in the spool chamber 2 flows to the oil outlet through the second oil passage 7 Port B, the oil in oil outlet B can be used by another hydraulic sequence valve; at the same time, the gasket 07 is lifted up under the action of the hydraulic oil and the second elastic member 09, that is, the steel ball is jacked up together with the gasket 07, so that The steel ball abuts against the intersection of the one-way valve cavity 3 and the fourth oil passage 9 .

When the hydraulic oil is unloaded at the oil inlet A, the hydraulic oil at the oil outlet B passes through the fourth oil passage 9 to press the steel ball down, so that the steel ball is separated from the junction of the check valve chamber 3 and the fourth oil passage 9, and this At this time, the hydraulic oil flows to the oil inlet A through the fourth oil passage 9, the one-way valve cavity 3 and the third oil passage 8 in sequence; The hydraulic oil at the oil outlet B cannot flow to the oil outlet B through the spool chamber 2 against the junction of the first oil passage 6 and the spool chamber 2 .

Of course, the above description is only an example of the utility model, and is not intended to limit the implementation scope of the utility model. All equivalent changes or modifications made according to the structure, features and principles described in the patent scope of the utility model shall include Within the patent scope of the utility model application.

Claims (10)

1. An oil pressure sequence valve, comprising: a valve body (1), the valve body (1) is provided with an oil inlet (A), a spool chamber (2), a one-way valve chamber (3), an oil outlet (B), wherein, the oil inlet (A) communicates with the oil outlet (B) through the spool chamber (2), and a spool (4) is arranged in the spool chamber (2); the oil inlet (A) passes through The one-way valve chamber (3) communicates with the oil outlet (B), and the one-way valve chamber (3) is provided with a one-way valve (5), through which the oil inlet (A) flows to the oil outlet The oil path of the port (B) is closed, and it is characterized in that: the bottom end of the spool (4) is formed with a spool head (41) that closes the oil path from the oil inlet (A) to the oil outlet (B), The oil path from the oil inlet (A) to the oil outlet (B) is closed through the spool head (41). 2. The hydraulic sequence valve according to claim 1, characterized in that: the oil inlet (A) communicates with the spool cavity (2) through the first oil passage (6), and the spool cavity (2) passes through The second oil passage (7) communicates with the oil outlet (B); the oil inlet (A) communicates with the one-way valve chamber (3) through the third oil passage (8), and the one-way valve chamber (3) passes through the fourth The oil passage (9) communicates with the oil outlet (B). 3. The oil pressure sequence valve according to claim 2, characterized in that: the valve body (1) includes a body (11), a body cover (12) mounted on the body (11), and the oil inlet ( A), the oil outlet (B), the valve core chamber (2), and the one-way valve chamber (3) are respectively arranged on the body (11), and the first elastic member (01) is arranged inside the body cover (12); A sealing cover (03) is installed at the opening of the valve core cavity (2), the top end of the valve core (4) penetrates the sealing cover (03) and leans against the first elastic member (01), the valve core (4) The core head (41) leans against the junction of the first oil passage (6) and the valve core cavity (2). 4. The hydraulic sequence valve according to claim 3, characterized in that: a spring washer (02) is installed on the top end of the first elastic member (01), and a spring washer (02) is installed on the bottom end of the first elastic member (01). Another spring washer (012), wherein the spring washer (02) is fixed on the body cover (12), and the other spring washer (012) leans against the top of the valve core (4). 5. The hydraulic sequence valve according to claim 3 or 4, characterized in that: a sealing cover O-ring (04) is installed at the connection between the sealing cover (03) and the body (11). 6. The oil pressure sequence valve according to claim 5, characterized in that: a back support (05), a valve core O-ring (06) and a gasket (07) are installed on the sealing cover (03). 7. The hydraulic sequence valve according to claim 6, characterized in that: the one-way valve (5) comprises: a screw (08) fixedly installed on the body (11), a second screw (08) on the top of the screw (08) Two elastic pieces (09), another washer (010) on the top of the second elastic piece (09), a steel ball (011) on the other washer (010), the second elastic piece (09) pushes the steel ball against At the junction of the one-way valve cavity (3) and the fourth oil passage (9). 8. The hydraulic sequence valve according to claim 7, characterized in that: the spring washer (02) is formed with a groove (021) for the top end of the valve core (4) to be socketed. 9. The hydraulic sequence valve according to claim 8, characterized in that: the first elastic member (01) is a spring. 10. The hydraulic sequence valve according to claim 8 or 9, characterized in that: the second elastic member (09) is a spring.

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