A plunger-type rack-driven two-position three-way valve

Abstract

The present invention discloses a plunger-type rack-driven two-position three-way valve, comprising a valve body; a valve core, which is installed in the valve body and can move axially to form a channel; a filling gun head, which is connected to the tail end of the valve body through a valve body intermediate body and is used to match an external charging head; an air intake connector, which is connected to the front end of the valve body and matches the front end of the valve core; and a transmission mechanism, which is installed in the valve body to drive the valve core to move axially, and control the channel operation state by changing the position of the valve core; the present invention has a reasonable design and is easy to use, is used for the filling of CNG or hydrogen, is easy to manufacture and assemble, and has internal self-balancing. Through the reasonable design of the valve core, the valve core can move axially under the drive of the transmission mechanism, and the state of the channel can be changed by the movement of the valve core, which is easy to control and has high reliability; it has the characteristics of valve core integration and anti-stuck.

Description

Technical Field

[0001] The invention relates to a filling valve for liquid or gas, in particular to a plunger type rack transmission two-position three-way valve. Background Art

[0002] A two-position three-way valve is a valve that controls the flow direction of a fluid (gas, liquid). In the process of fluid (gas, liquid) transportation, a two-dimensional three-way valve is required to control the flow direction and flow status (smooth or closed) of the medium. However, most traditional two-position three-way valves cannot adapt to special working conditions such as high pressure (20-100MPa), and have the disadvantages of large friction resistance of the control valve core and easy jamming of the valve core. Especially in CNG, high-pressure hydrogen and other filling applications. Summary of the invention

[0003] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a two-position three-way valve for CNG or hydrogen filling, which is reasonably designed and easy to use. It is easy to manufacture and assemble, has internal self-balancing, and through a reasonably designed valve core, the valve core can move axially under the drive of the transmission mechanism, and the state of the channel can be changed by the movement of the valve core. It is easy to operate and has high reliability. It has the characteristics of valve core integration and anti-stuckness.

[0004] The present invention is implemented by constructing a plunger-type rack-driven two-position three-way valve, comprising

[0005] Valve body;

[0006] The valve core is installed in the valve body and can move axially to form a channel;

[0007] The filling gun head is connected to the tail end of the valve body through the valve body intermediate body, and is used to match the external feeding head;

[0008] An air inlet connector connected to the front end of the valve body and matched with the front end of the valve core; and

[0009] The transmission mechanism is installed on the valve body to drive the valve core to move axially, and the operating state of the control channel is controlled by changing the position of the valve core.

[0010] Preferably, the transmission mechanism comprises

[0011] A transmission block, the upper end of which is fixedly connected to the middle of the valve core and the lower end of which is provided with a transmission rack;

[0012] A support plate, which is fixedly mounted on the lower end of the valve body and has an arc-shaped lower end; and

[0013] A handle, the front end of which is provided with a power tooth matching the transmission rack, the handle is installed on the upper end of the bracket plate through a pin shaft at the center of the power tooth, the handle can rotate with the pin shaft as the axis, and when the handle is rotated, the valve core is driven to move axially through the matching of the power tooth and the transmission rack.

[0014] Preferably, a handle is provided at the outer end of the handle, the upper end of the handle is arc-shaped and matches the arc-shaped lower end of the bracket plate to achieve rotational guidance of the handle.

[0015] Preferably, a small gun nozzle is arranged inside the filling gun head, a gun head spring located inside the intermediate body is arranged between the small gun nozzle and the valve core, and an anti-collision sheath is arranged on the periphery of the tail end of the valve core.

[0016] Preferably, the filling gun head is provided with a locking mechanism, which includes

[0017] A trigger ring, which is installed inside the filling gun head and sleeved on the outer wall of the small gun nozzle, and is provided with a shaft shoulder in the middle, the rear end of which is limited by a stop ring provided in the inner hole of the filling gun head, and a spring is provided between the front end of the trigger ring and the shoulder of the inner hole of the filling gun head;

[0018] A front positioning needle, which is installed in the middle of the filling gun head and is used to limit the trigger ring after it moves to the front end, and the lower part of the front positioning needle is a cone surface, which matches the installation groove of the external feeding head; and

[0019] The rear positioning needle is installed at the rear of the filling gun head and is used to limit the external feeding head inserted into the rear of the filling gun head. The lower part of the front positioning needle is a cone surface, which matches the installation groove of the external feeding head, and can better protect the external feeding head. When the installation groove of the external feeding head moves dependently with the front positioning needle, it is a surface contact, overcoming the traditional point-to-surface contact that damages the external feeding head; making the external feeding head have a longer service life.

[0020] Preferably, the locking mechanism further comprises a locking sleeve, which is sleeved on the outer wall of the filling gun head and the intermediate body, and sleeved on the tail end of the valve body, and a main spring for giving thrust to the locking sleeve is installed in the locking sleeve, one end of the main spring is attached to the shoulder of the inner hole of the locking sleeve, and the other end is attached to the tail end face of the valve body;

[0021] A large reinforcing bushing for locking the rear positioning needle is installed at the rear of the locking sleeve, and an anti-collision pad and a small reinforcing bushing for locking the front positioning needle are arranged in sequence at the front end of the large reinforcing bushing, and the small reinforcing bushing is limited by the inner hole shoulder of the locking sleeve.

[0022] Preferably, a flow diversion component located inside the air inlet connector is provided at the front end of the valve core.

[0023] Preferably, the diverter assembly comprises a diverter block, which is fixedly installed inside the air inlet connector via a support ring, and the rear end of the support ring is clamped between the valve body and the air inlet connector.

[0024] Preferably, a limiting sleeve is installed inside the rear end of the filling gun head.

[0025] Preferably, the valve body is provided with a plurality of pressure relief passages, wherein the upper pressure relief passage is connected to a pipe connected to an external device, and a protective cover is installed at the front end of the valve body.

[0026] The present invention has the following beneficial effects:

[0027] The invention has reasonable design and is easy to use. It is a two-position three-way valve for gas or liquid filling. Through the reasonable design of the valve core, the valve core can move axially under the drive of the transmission mechanism, and the state of the channel can be changed through the movement of the valve core. It is easy to operate and has high reliability.

[0028] The transmission mechanism is reasonably designed. The transmission mechanism adopts the transmission mode of gears and racks, with high transmission accuracy and easy control. The main components include a handle and a transmission block. The transmission block is fixedly installed at the lower end of the valve core by screws, and a rack is arranged at the lower end of the transmission block. The handle is installed on the bracket plate through a pin shaft, and a power tooth is arranged at the upper end of the handle. During transmission, the handle rotates with the axis of the pin shaft, thereby driving the power tooth to rotate. The power tooth and the rack are meshed, so when the power tooth rotates, it drives the transmission block to move. The transmission mechanism adopts the transmission mode of gears and racks, with high transmission accuracy, low friction and easy control.

[0029] At the same time, the lower end of the bracket plate on which the handle is installed is arc-shaped, and the handle is also provided with a handle, the upper end of the handle is an arc surface that matches the arc shape of the lower end of the bracket plate, and the two arc surfaces fit together to guide the rotation of the handle.

[0030] A locking mechanism is reasonably designed, which is used to lock an externally connected feeding head to ensure that the feeding head can be stably and reliably connected to the present invention and complete the filling of gas or liquid. A trigger ring, a front positioning needle, a rear positioning needle and a locking sleeve are reasonably designed. The trigger ring is installed inside the filling gun head and sleeved on the outer wall of the small gun nozzle, and a shaft shoulder is provided in the middle. The rear end of the shaft shoulder is limited by a stop ring provided on the inner hole of the filling gun head, and a spring is provided between the front end of the trigger ring and the shoulder of the inner hole of the filling gun head; the locking sleeve is sleeved on the outer wall of the filling gun head and the intermediate body, and sleeved on the tail end of the valve body. A main spring that gives thrust to the locking sleeve is installed in the locking sleeve, and one end of the main spring fits against the shoulder of the inner hole of the locking sleeve, and the other end fits against the shoulder of the inner hole of the locking sleeve. At the rear end face of the valve body; when installing the external feeding head, the filling gun head reaches the bottom, pushing the internal trigger ring to move. When the trigger ring is aligned to a certain position, the front positioning pin falls down and is limited by the front positioning pin. At this time, due to the falling of the front positioning pin, the locking sleeve is pushed under the action of the main spring, and the small reinforced sleeve after pushing the locking sleeve presses the front positioning pin. After pressing the front positioning pin, the trigger ring is locked to make its limiting effect better; after the feeding head is inserted to the end, the rear positioning pin falls into the limiting groove of the feeding head, and when the pushed locking sleeve slides to the end, the large reinforced sleeve inside the locking sleeve presses the rear positioning pin to move, so that the rear positioning pin is tightly inserted into the groove of the feeding head, so that the quick connection of the feeding head is locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 is a side view of the present invention;

[0033] Figure 3 yes Figure 2 Sectioned in the AA direction, assembly drawing of exhaust disconnected state;

[0034] Figure 4 yes Figure 2 Sectioned in the AA direction, assembly drawing of the exhaust not disconnected;

[0035] Figure 5 yes Figure 2 Sectioned in the AA direction, assembly drawing of the gas-filled state;

[0036] Figure 6 yes Figure 2 The middle BB is cut open, and the external feeding head is locked and assembled in the gas-filled state;

[0037] Figure 7 yes Figure 2 The assembly diagram of the exhaust disconnected state when the BB is cut open;

[0038] Figure 8 It is a three-dimensional diagram of the valve core of the present invention;

[0039] Figure 9-10 It is a three-dimensional schematic diagram of the diverter block of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the attached Figure 1-Figure 10 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] like Figure 1-Figure 10 As shown, the present invention provides a plunger-type rack-driven two-position three-way valve, characterized in that: it includes

[0042] Valve body 1;

[0043] The valve core 2 is installed in the valve body and can move axially to form a channel;

[0044] The filling gun head 3 is connected to the tail end of the valve body through the valve body intermediate body 4, and is used to match the external feeding head 27;

[0045] An air inlet connector 5 is connected to the front end of the valve body and matches the front end of the valve core; and

[0046] The transmission mechanism is installed on the valve body to drive the valve core to move axially, and changes the operating state of the control channel (the channel is composed of the flow channel in the middle of the valve core, the flow channel in the middle of the small gun nozzle and the flow channel in the middle of the diverter block) by changing the position of the valve core.

[0047] In this embodiment, the transmission mechanism includes

[0048] A transmission block 6, the upper end of which is fixedly connected to the middle of the valve core and a transmission rack is provided at the lower end;

[0049] A support plate 7, which is fixedly mounted on the lower end of the valve body and has an arc-shaped lower end; and

[0050] The handle 8 has a power tooth matched with the transmission rack at the front end. The handle is installed on the upper end of the bracket plate through a pin shaft at the center of the power tooth. The handle can rotate with the pin shaft as the axis. When the handle is rotated, the power tooth and the transmission rack are matched to drive the valve core to move axially.

[0051] In this embodiment, a handle 9 is provided at the outer end of the handle, and the upper end of the handle is arc-shaped and matches the arc-shaped lower end of the bracket plate to achieve rotation guidance of the handle.

[0052] In this embodiment, a small gun nozzle 10 is arranged inside the filling gun head, a gun head spring 11 located inside the intermediate body is arranged between the small gun nozzle and the valve core, and an anti-collision sheath is arranged on the periphery of the tail end of the valve core.

[0053] In this embodiment, the filling gun head is provided with a locking mechanism, which includes

[0054] A trigger ring 12 is installed inside the filling gun head and sleeved on the outer wall of the small gun nozzle, and a shaft shoulder is provided in the middle, and the rear end of the shaft shoulder is limited by a stop ring 13 provided in the inner hole of the filling gun head, and a spring 14 is provided between the front end of the trigger ring and the shoulder of the inner hole of the filling gun head;

[0055] A front positioning needle 15, which is installed in the middle of the filling gun head and is used to limit the trigger ring after it moves to the front end, and

[0056] The rear positioning needle 16 is installed at the rear of the filling gun head and is used to limit the external feeding head inserted into the rear of the filling gun head.

[0057] In this embodiment, the locking mechanism further includes a locking sleeve 17, which is sleeved on the outer wall of the filling gun head and the intermediate body, and sleeved on the tail end of the valve body. A main spring 18 for giving thrust to the locking sleeve is installed in the locking sleeve, and one end of the main spring is attached to the shoulder of the inner hole of the locking sleeve, and the other end is attached to the tail end face of the valve body.

[0058] A large reinforcing bushing 19 for locking the rear positioning needle is installed at the rear of the locking sleeve, and an anti-collision pad 20 and a small reinforcing bushing 21 for locking the front positioning needle are arranged in sequence at the front end of the large reinforcing bushing, and the small reinforcing bushing is limited by the inner hole shoulder of the locking sleeve.

[0059] In this embodiment, a flow diversion component located inside the air inlet connector is disposed at the front end of the valve core.

[0060] In this embodiment, the flow splitter assembly includes a flow splitter block 22, which is fixedly installed inside the air inlet connector via a support ring 23, and the rear end of the support ring is clamped between the valve body and the air inlet connector.

[0061] In this embodiment, a limiting sleeve 24 is installed inside the rear end of the filling gun head.

[0062] In this embodiment, the valve body is provided with several pressure relief passages, wherein the upper pressure relief passage 1.1 is connected to a pipe 25 connected to an external device, and a protective cover 26 is installed at the front end of the valve body; the lower part of the valve body is provided with a lower pressure relief passage 1.2, which is an emergency pressure relief passage to prevent a slight leakage of the sealing ring. Leakage may cause local pressure build-up at the corner, thereby making it impossible to completely exhaust the gas inside the gun; when the local pressure reaches a certain level, a safety risk may occur, and the lower pressure relief passage is designed to avoid this risk.

[0063] In this embodiment, the fixed connection portion is sealed by an energy storage sealing ring.

[0064] The present invention is a valve for filling gas or liquid. When in use, the gas source pipeline is connected to the gas inlet connector, and then the external charging head is connected to the charging gun head.

[0065] Insert the feeding head into the filling gun head to the bottom, push the internal trigger ring to move, when the trigger ring is aligned to a certain position, the front positioning pin falls, and is limited by the front positioning pin. At this time, due to the falling of the front positioning pin, the locking sleeve is pushed by the main spring, and the small reinforcing bushing presses the front positioning pin after pushing the locking sleeve. After pressing the front positioning pin, the trigger ring is locked to achieve a better limiting effect;

[0066] After the charging head is inserted to the end, the rear positioning pin falls into the limiting groove of the charging head, and when the pushed locking sleeve slides to the end, the large reinforcing bushing inside the locking sleeve presses the rear positioning pin to move, so that the rear positioning pin is tightly inserted into the groove of the charging head, so that the quick connection of the charging head is locked, thereby facilitating stable gas filling;

[0067] After the connection is completed, move the handle, the handle drives the handle to rotate, and the handle rotates with the pin shaft as the axis. During the rotation of the handle, the power tooth at the upper end drives the transmission rack to move, thereby driving the valve core to move axially. When the valve core moves forward, the air inlet of the diverter block is connected with the channel inside the valve core, and the liquid or gas enters the small gun nozzle through the channel, and then enters the external feeding head, thereby realizing gas or liquid addition;

[0068] After the gas filling is completed, first release the pressure and exhaust, then remove the feeding head.

[0069] When releasing pressure and exhausting, move the handle to make the valve core move in the opposite direction. After the movement, the air inlet of the valve core is offset from the channel of the diverter block, so that air or liquid cannot be introduced. The external charging head is provided with a one-way valve, so that the gas or liquid will not flow back. The gas remaining in the valve core is discharged from the connecting pipe through the upper pressure relief channel 1.1. After the pressure relief and exhausting is completed, the charging head is taken out;

[0070] When taking out the filling head, manually push the locking sleeve to move in the opposite direction and pull out the filling head at the same time. After the locking sleeve moves in the opposite direction, the rear positioning needle does not have the pressure of the large reinforcing sleeve, so the filling head can be pulled to contact the limit of the rear positioning needle, allowing it to be removed smoothly. At the same time, the trigger ring is pushed to reset under the action of the spring.

[0071] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plunger-type rack-driven two-position three-way valve, characterized in that: include Valve body; The valve core is installed in the valve body and can move axially to form a channel; The filling gun head is connected to the tail end of the valve body through the valve body intermediate body, and is used to match the external feeding head; An air inlet connector connected to the front end of the valve body and matched with the front end of the valve core; and The transmission mechanism is installed on the valve body to drive the valve core to move axially, and the operating state of the control channel is controlled by changing the position of the valve core; A small gun nozzle is arranged inside the filling gun head, a gun head spring located inside the intermediate body is arranged between the small gun nozzle and the valve core, and an anti-collision sheath is arranged outside the tail end of the valve core; The filling gun head is provided with a locking mechanism, which includes A trigger ring is installed inside the filling gun head and sleeved on the outer wall of the small gun nozzle, and a shaft shoulder is arranged in the middle, and the rear end of the shaft shoulder is limited by a retaining ring arranged in the inner hole of the filling gun head, and a spring is arranged between the front end of the trigger ring and the shoulder of the inner hole of the filling gun head; A front positioning needle is installed in the middle of the filling gun head and is used to limit the trigger ring after it moves to the front end. The lower part of the front positioning needle is a cone surface, which matches the installation groove of the external feeding head, and A rear positioning needle, which is installed at the rear of the filling gun head and is used to limit the insertion of an external feeding head at the rear of the filling gun head; A flow splitter component located inside the air inlet joint is arranged at the front end of the valve core.

2. A plunger-type rack-driven two-position three-way valve according to claim 1, characterized in that: The transmission mechanism comprises A transmission block, the upper end of which is fixedly connected to the middle of the valve core and the lower end of which is provided with a transmission rack; A support plate, which is fixedly mounted on the lower end of the valve body and has an arc-shaped lower end; and A handle, the front end of which is provided with a power tooth matching the transmission rack, the handle is installed on the upper end of the bracket plate through a pin shaft at the center of the power tooth, the handle can rotate with the pin shaft as the axis, and when the handle is rotated, the valve core is driven to move axially through the matching of the power tooth and the transmission rack.

3. A plunger-type rack-driven two-position three-way valve according to claim 2, characterized in that: A handle is arranged at the outer end of the handle, the upper end of which is arc-shaped and matches the arc-shaped lower end of the bracket plate to realize the rotation guidance of the handle.

4. A plunger-type rack-driven two-position three-way valve according to claim 1, characterized in that: The locking mechanism also includes a locking sleeve, which is sleeved on the outer wall of the filling gun head and the intermediate body, and sleeved on the tail end of the valve body. A main spring for giving thrust to the locking sleeve is installed in the locking sleeve, and one end of the main spring is attached to the shoulder of the inner hole of the locking sleeve, and the other end is attached to the tail end face of the valve body; A large reinforcing bushing for locking the rear positioning needle is installed at the rear of the locking sleeve, and an anti-collision pad and a small reinforcing bushing for locking the front positioning needle are arranged in sequence at the front end of the large reinforcing bushing, and the small reinforcing bushing is limited by the inner hole shoulder of the locking sleeve.

5. The plunger-type rack-driven two-position three-way valve according to claim 1, characterized in that: The flow splitter assembly comprises a flow splitter block, which is fixedly installed inside the air inlet connector via a support ring, and the rear end of the support ring is clamped between the valve body and the air inlet connector.

6. A plunger-type rack-driven two-position three-way valve according to claim 1, characterized in that: A limiting sleeve is installed inside the tail end of the filling gun head.

7. The plunger-type rack-driven two-position three-way valve according to claim 1, characterized in that: The valve body is provided with several pressure relief passages, wherein the upper pressure relief passage is connected with a pipe connected with an external device, and a protective cover is installed at the front end of the valve body.

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