Bolt locking oil cylinder

Abstract

The utility model discloses a bolt locking oil cylinder, which comprises a rodless cavity and a rod cavity, and is characterized in that the rodless cavity and the rod cavity are respectively connected with a counterbalance valve, the counterbalance valve comprises a one-way valve and a control valve, the rod cavity and the rodless cavity are respectively communicated with the one-way valve, and oil enters the rod cavity and the rodless cavity through the one-way valve. The rod cavity and the rodless cavity are respectively communicated with the control valves and return oil through the control valves, any one control valve loads oil, one part of the oil enters the oil cavity communicated with the counterbalance valve, the other part of the oil opens the control valve of the other counterbalance valve, so that the oil cavity communicated with the other counterbalance valve returns oil, and the counterbalance valves have different pressure guide ratios. One counterbalance valve loads oil liquid to lock the oil cylinder or the other counterbalance valve loads oil liquid to unlock the oil cylinder. By means of the mode, according to the bolt locking oil cylinder, locking and unlocking of the oil cylinder can be achieved through the counterbalance valve, the structure of the oil cylinder is simplified, and the size of the oil cylinder is reduced.

Description

Technical Field

[0001] The utility model relates to the field of oil cylinders, in particular to a latch locking oil cylinder for a ship's cabin door. Background Art

[0002] The hatch of a ship at sea needs to be locked with a cylinder after it is closed. Conventional locking cylinders can play a locking role after being extended, but at this time the hydraulic oil in the large chamber of the cylinder has no oil pressure. The ship is in a relatively bumpy environment at sea. In order to ensure that the cylinder is in a stable locking state, a locking method of installing a steel ball is currently used in most cases. The characteristics of this locking structure are: the locking ring is positioned on the end face of the cylinder, the steel ball is installed in the hole on the piston, the spring is placed inside the spacing bushing, installed on the outside of the piston, the outside of the cylinder, the bottom of the cylinder, and the guide sleeve is threaded on the cylinder. During assembly: the first part first installs the spring inside the spacing bushing, and then installs it together with the inner hole of the cylinder bottom, and uses the spacing sleeve to position it to prevent the spring from popping out; then the locking ring is positioned on the end face of the cylinder, and the assembled cylinder bottom assembly is screwed into the cylinder as a whole, and the torque is applied. The second part installs the steel ball in the hole on the piston, and then installs it as a whole into the inner hole of the first part. The third part screws the guide sleeve into the cylinder, and the rod head is screwed into the piston rod, and the assembly is completed.

[0003] The commonly used locking method at present is the locking method using steel balls as mentioned above, which has the following disadvantages:

[0004] 1. The ball locking structure has many parts and is relatively complicated.

[0005] 2. In order to achieve the corresponding locking force to ensure the locking requirements, the cylinder rod diameter is often required to be very long, so as to match the size of the steel ball.

[0006] 3. The starting pressure of the steel ball lock is mostly around 0.2-0.3MPa. In a bumpy sea environment, the hydraulic oil is likely to generate oil pressure in the pipeline, resulting in self-unlocking. Summary of the invention

[0007] The main technical problem solved by the utility model is to provide a latch locking oil cylinder, which can realize locking and unlocking of the oil cylinder through a counterbalance valve, simplify the oil cylinder structure and reduce the volume of the oil cylinder.

[0008] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a latch locking cylinder, including a rodless chamber and a rod chamber, the rodless chamber and the rod chamber are respectively connected with a counterbalance valve, the counterbalance valve includes a one-way valve and a control valve, the rod chamber and the rodless chamber are respectively connected with the one-way valve and oil enters through the one-way valve, the rod chamber and the rodless chamber are respectively connected with the control valve and oil returns through the control valve, any of the control valves is loaded with oil, part of the oil enters the oil chamber connected with the counterbalance valve, and the other part of the oil opens the control valve of the other counterbalance valve, so that the oil chamber connected with the other counterbalance valve returns oil, the counterbalance valves have different pressure guide ratios, one counterbalance valve loads oil to lock the cylinder or the other counterbalance valve loads oil to unlock the cylinder.

[0009] In a preferred embodiment of the utility model, when the oil cylinder is in the fully extended state, oil enters the counter-balancing valve connected to the rodless chamber, a part of the oil enters the rodless chamber through the one-way valve of the counter-balancing valve, and the other part of the oil enters the control valve of another counter-balancing valve. The control valve is opened to allow the oil in the rod chamber to return through the control valve, thereby locking the oil cylinder.

[0010] In a preferred embodiment of the utility model, the counter-balancing valve connected to the rod chamber is filled with oil, and a part of the oil enters the rod chamber through the one-way valve of the counter-balancing valve, and the other part of the oil enters the control valve of another counter-balancing valve. The control valve is opened to allow the oil in the rodless chamber to return through the control valve, thereby unlocking the oil cylinder.

[0011] In a preferred embodiment of the present invention, the control valve of the rodless chamber is pressurized with oil pressure to lock the oil cylinder, and the control valve of the rod chamber is loaded with oil pressure to unlock the oil cylinder.

[0012] In a preferred embodiment of the present invention, the pressurizing port of the control valve is communicated with the control port of another control valve, so that the control valves can be controlled to switch each other.

[0013] In a preferred embodiment of the present invention, the counterbalance valve is arranged outside the oil cylinder and located on the side of the rodless chamber.

[0014] In a preferred embodiment of the present invention, the rod chamber and the counterbalancing valve are connected via a pipeline outside the oil cylinder.

[0015] The beneficial effects of the utility model are as follows: the utility model latch locks the oil cylinder, uses an oil cylinder locking structure controlled by two counterbalancing valves, and controls the locking of the oil cylinder in the fully extended and fully retracted states through the selection of the counterbalancing valves and the calculation of the pressure guide ratio.

[0016] The utility model latches and locks the oil cylinder, realizes mutual control through the counterbalance valve, calculates the guide pressure ratio of the counterbalance valve according to the oil cylinder, thereby ensuring that the counterbalance valve is not affected by the oil pressure generated in the rod cavity due to the turbulence of the hull, and avoids the oil cylinder from self-unlocking in a turbulent environment. When the oil cylinder is retracted, its locking can also be controlled. The locking of the oil cylinder can be ensured by selecting the correct guide pressure ratio.

[0017] The utility model discloses a latch locking oil cylinder, which adopts a counter-balancing valve to replace a conventional locking structure, simplifies the oil cylinder structure and can also make the cylinder rod diameter of the oil cylinder smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0019] Figure 1 This is a schematic diagram of a preferred embodiment of the latch locking cylinder of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the latch locking cylinder;

[0021] The components in the accompanying drawings are marked as follows: 1. rodless chamber, 2. rod chamber, 3. counterbalance valve, 31. check valve, 32. control valve, 4. oil cylinder. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiment of the utility model will be described clearly and completely below. The structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions that can be implemented in the utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that can be produced by the utility model and the purpose that can be achieved, should still fall within the scope of the technical content disclosed in the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of narration, and are not used to limit the scope that can be implemented. The change or adjustment of its relative relationship should also be regarded as the scope that can be implemented in the utility model without substantially changing the technical content.

[0023] See also Figure 1 and Figure 2A latch locking cylinder comprises a cylinder body and a piston and a piston rod arranged in the cylinder body, wherein the piston rod divides the cylinder body into a rodless chamber 1 and a rod chamber 2. The rest of the conventional structure of the cylinder 4 is not repeated. The rodless chamber 1 and the rod chamber 2 are respectively connected to a counterbalance valve 3. The counterbalance valve 3 is arranged outside the cylinder 4 and is located on one side of the rodless chamber 1. The rod chamber 2 and the counterbalance valve 3 are connected by a pipeline outside the cylinder. The two counterbalance valves 3 are respectively connected to the rod chamber 2 and the rodless chamber 1. The pressurizing port of the control valve 32 is connected to the control port of another control valve 32, so as to realize mutual control switching between the control valves 32, and the two counterbalance valves 3 are connected to each other to ensure mutual unlocking.

[0024] The counterbalance valve 3 includes a one-way valve 31 and a control valve 32. The rod chamber 2 and the rodless chamber 1 are respectively connected to the one-way valve 31 and oil is introduced through the one-way valve 31. The rod chamber 2 and the rodless chamber 1 are respectively connected to the control valve 32 and oil is returned through the control valve 32. When the oil cylinder 4 is in normal operation, the counterbalance valve 3 connected to the rodless chamber 1 is fed with oil, a part of the oil flows through the rodless chamber 1 through the one-way valve 31, and the other part of the oil flows into the control valve 32 of another counterbalance valve 3. The control valve 32 is opened, and the oil in the rod chamber 2 returns through the counterbalance valve 3, realizing the process of extending the piston rod, and vice versa, the piston rod retracts.

[0025] Any control valve 32 is loaded with oil, part of the oil enters the oil chamber connected to the counter-valve 3, and the other part of the oil opens the control valve 32 of the other counter-valve 3, so that the oil chamber connected to the other counter-valve 3 returns oil. The counter-valve 3 has different pressure ratios. One counter-valve 3 is loaded with oil to lock the oil cylinder 4, or the other counter-valve 3 is loaded with oil to unlock the oil cylinder 4. The two counter-valve 3 are mutually controlled to realize the locking of the oil cylinder 4 when extending and retracting. The pressure ratio can be used to calculate that the pressure must reach a certain level before the counter-valve 3 can be opened. This pressure is much greater than the pressure generated by the hydraulic oil in the system due to the turbulence of the hull. Selecting the correct pressure ratio can ensure the locking of the oil cylinder 4. The selection of the pressure ratio is adjusted according to the working conditions of the oil cylinder 4, which belongs to the conventional technical means of those skilled in the art.

[0026] The control valve 32 of the rodless chamber 1 pressurizes the oil pressure to lock the oil cylinder 4. When the oil cylinder 4 is in the fully extended state, the counterbalance valve 3 connected to the rodless chamber 1 enters the oil, and a part of the oil enters the rodless chamber 1 through the one-way valve 31 of the counterbalance valve 3, and the other part of the oil enters the control valve 32 of another counterbalance valve 3. The control valve 32 is opened, and the oil in the rod chamber 2 is returned through the control valve 32 to lock the oil cylinder 4. The counterbalance valve 3 connected to the rodless chamber 1 can provide a stable oil pressure inside the rodless chamber 1. At the same time, the oil enters the counterbalance valve 3 connected to the rod chamber 2, opens its control port, and the rod chamber 2 returns oil, and the locking of the oil cylinder 4 in the fully extended state is achieved.

[0027] The control valve 32 of the rod chamber 2 is loaded with oil pressure to unlock the oil cylinder 4. The counterbalance valve 3 connected to the rod chamber 2 is fed with oil, and a part of the oil enters the rod chamber 2 through the one-way valve 31 of the counterbalance valve 3, and the other part of the oil enters the control valve 32 of another counterbalance valve 3. The control valve 32 is opened to allow the oil in the rodless chamber 1 to return through the control valve 32, thereby unlocking the oil cylinder 4. When the oil cylinder 4 needs to be unlocked, the counterbalance valve 3 connected to the rod chamber 2 is pressurized, and at the same time, the control port of the counterbalance valve 3 connected to the rodless chamber 1 is opened to allow the oil to return to the rodless chamber 1. The oil cylinder 4 is unlocked and can be retracted. This is a complete circuit. The unlocking pressure of the oil cylinder 4 can be calculated by the pressure conduction ratio. This value is much larger than the locking force of the steel ball lock, which can ensure that the oil cylinder 4 is not affected by the turbulent state of the ship.

[0028] The locking and unlocking of the oil cylinder 4 is achieved through mutual control of the counter-valve 3, which is simpler than the existing locking structure, and the cylinder rod diameter of the oil cylinder 4 can be made smaller. The locking of the oil cylinder 4 is not affected by the turbulence of the ship, and the counter-valve 3 can better control the locking of the oil cylinder.

[0029] Different from the prior art, the latch locking oil cylinder of the utility model can realize locking and unlocking of the oil cylinder through a counterbalance valve, thereby simplifying the oil cylinder structure and reducing the volume of the oil cylinder.

[0030] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A latch locking cylinder, comprising a rodless chamber (1) and a rod chamber (2), characterized in that: The rodless chamber (1) and the rod chamber (2) are respectively connected to a counterbalancing valve (3), the counterbalancing valve (3) comprising a one-way valve (31) and a control valve (32), the rod chamber (2) and the rodless chamber (1) are respectively connected to the one-way valve (31) and oil is introduced through the one-way valve (31), the rod chamber (2) and the rodless chamber (1) are respectively connected to the control valve (32) and oil is returned through the control valve (32), any one of the control valves (32) is loaded with oil, a part of the oil enters the oil chamber connected to the counterbalancing valve (3), and another part of the oil opens the control valve (32) of the other counterbalancing valve (3), so that the oil chamber connected to the other counterbalancing valve (3) returns oil, the counterbalancing valves (3) have different pressure guide ratios, one counterbalancing valve (3) is loaded with oil to lock the oil cylinder (4) or the other counterbalancing valve (3) is loaded with oil to unlock the oil cylinder (4).

2. The latch locking cylinder according to claim 1, characterized in that: When the oil cylinder (4) is in the fully extended state, oil enters the counterbalance valve (3) connected to the rodless chamber (1), a portion of the oil enters the rodless chamber (1) through the one-way valve (31) of the counterbalance valve (3), and another portion of the oil enters the control valve (32) of another counterbalance valve (3). The control valve (32) is opened, allowing the oil in the rod chamber (2) to return through the control valve (32), thereby locking the oil cylinder (4).

3. The latch locking cylinder according to claim 2, characterized in that: The counter-valve (3) connected to the rod chamber (2) is supplied with oil, a portion of the oil enters the rod chamber (2) through the one-way valve (31) of the counter-valve (3), and another portion of the oil enters the control valve (32) of another counter-valve (3). The control valve (32) is opened, allowing the oil in the rodless chamber (1) to return through the control valve (32), thereby unlocking the oil cylinder (4).

4. The latch locking cylinder according to claim 3, characterized in that: The control valve (32) of the rodless chamber (1) is pressurized with oil pressure to lock the oil cylinder (4), and the control valve (32) of the rod chamber (2) is loaded with oil pressure to unlock the oil cylinder (4).

5. The latch locking cylinder according to any one of claims 1 to 4, characterized in that: The pressurizing port of the control valve (32) is communicated with the control port of another control valve (32), thereby realizing mutual control of the switching between the control valves (32).

6. The latch locking cylinder according to claim 5, characterized in that: The counterbalance valve (3) is arranged outside the oil cylinder (4) and is located on one side of the rodless chamber (1).

7. The latch locking cylinder according to claim 6, characterized in that: The rod chamber (2) and the counterbalance valve (3) are connected via a pipeline outside the oil cylinder (4).

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