CN217301649U - High-pressure stop valve and pressure calibration device - Google Patents

Abstract

The utility model provides a high pressure stop valve and pressure calibration device for the pressure calibration device, including stop valve needle and stop valve cover, the stop valve cover is located stop valve needle, when stopping valve needle axial motion to the stop position, the controlled pipeline is stopped, when stopping valve needle axial motion to the intercommunication position, the controlled pipeline is communicated, still include driving motor; the stop valve needle is provided with a driving connecting part which is in adaptive connection with an output shaft of a driving motor; the stop valve sleeve is in threaded connection with the stop valve needle at a first position, the stop valve sleeve is in sealed connection with the stop valve needle at a second position, and the second position is located between the first position and a controlled pipeline; the utility model discloses the scheme is small, and the integrated level is high, but motor output shaft direct drive end the needle, simultaneously, has integrateed the transmission screw thread on the end needle, and functions such as motor coupling part (drive connecting portion) make the stop valve space compacter, are convenient for use at small-size or portable equipment.

Description

High-pressure stop valve and pressure calibration device

Technical Field

The utility model relates to a technical field of pressure check measurement is a high pressure stop valve particularly to and be equipped with the pressure calibration equipment of this high pressure stop valve.

Background

The valve is an important control device for controlling the direction, pressure and flow of fluid in a fluid system, which is a device for controlling the flow of media (liquid, gas and powder) in pipes and equipment, and as an important element in a pressure control system, the medium under pressure generated by a pressure pump needs to pass through various valves to reach an execution element part, the valves are various and are divided according to the functions of the valves, and can comprise a stop valve, a check valve, a regulating valve, a safety valve and the like, wherein the stop valve plays a role of opening and closing and is mainly used for realizing the cutoff of different parts of a pipeline, and is one of the most commonly used valves in the pressure control system, for example, the prior art provides a stop valve convenient for regulating the output size, which comprises a valve body and a stop valve cover, the upper end of the valve body is fixedly connected with the stop valve cover, and one end of the valve body is connected with a pipeline through a flange, the stop valve cover is connected with a threaded rod through threads, one end of the threaded rod is rotationally connected with a connecting disc through a bearing, one end of the connecting disc is fixedly connected with an adjusting rod, one end of the adjusting rod is connected with a pressing seat in a penetrating mode, two ends of the pressing seat are fixedly connected with a valve body, the bottom of the pressing seat is fixedly connected with a sealing ring, and the surface of the sealing ring is attached to the valve body; similar prior art shut-off valves have a good effect on the tightness/shut-off.

In the pressure measurement calibration process, in order to provide calibration pressure, pressure calibration devices such as a pressure controller and a pressure calibrator are required to control the pressure output by a pressure source, so that the stop valve also has wider application, and meanwhile, different from the requirement of a general fluid system, the pressure measurement calibration field has special requirements on the stop valve, specifically, the automatic control of the stop valve is expected to be realized, and meanwhile, due to the pressure calibration, particularly the requirement of field pressure calibration, the pressure control pipeline is more dense in arrangement and smaller in volume than the pipeline of a general scene.

The automatic control scheme of the stop valve in the pressure checking device does not exist in the prior art, and the automatic control scheme of the stop valve is searched from the similar field.

For example, a flange type pneumatic stop valve comprises a first valve body, wherein a connecting pipe is fixedly connected to the position of a middle shaft on the outer surface of the top end in the first valve body. According to the flange type pneumatic stop valve, the piston rod is driven to move by the driving cylinder, so that the blocking block is driven to move, when the blocking block is separated from the stop valve control seat, fluid in the second valve body flows into the filter cartridge through the through hole in the position of the center shaft of the stop valve control seat, and after filtering operation, the fluid enters the first valve body and is finally discharged from the water outlet pipe; this scheme can realize the automatic control to the stop valve, however, relevant device is bulky, can not satisfy the volume constraint requirement of on-the-spot pressure check.

For another example, an easy-to-operate electric stop valve comprises a valve body, a lower valve rod, an upper valve rod, a valve cover, a handle, a shifting piece and an electric actuator, wherein a cover frame connected with the electric actuator is fixedly arranged at the top end of the valve cover, the upper valve rod movably penetrates through the cover frame, a threaded pipe sleeve connected with a screw thread of the upper valve rod is inserted at the top end of the valve cover, a sealing ring abutted against the valve cover and the threaded pipe sleeve is arranged in an end opening groove, the sealing ring is sleeved with the lower valve rod, the upper valve rod is sleeved outside the upper valve rod, a wing plate is fixedly arranged on the outer wall of the threaded pipe sleeve, a support is fixedly arranged at the top end of the valve cover, and the support is fixedly connected with the wing plate through a bolt connection pair; the scheme can also realize automatic control of the stop valve, is similar to the prior art scheme, has more complex related structure and larger device volume, and can not meet the volume constraint requirement of on-site pressure check.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved is as follows: how to realize the excellent sealing performance and the automatic control of the stop valve under the condition of smaller volume.

The application provides a high pressure stop valve and have pressure verifying attachment of this high pressure stop valve.

The high-pressure stop valve is used for a pressure checking device and comprises a stop valve needle and a stop valve sleeve, wherein the stop valve sleeve is sleeved on the stop valve needle, a controlled pipeline is stopped when the stop valve needle axially moves to a stop position, and the controlled pipeline is communicated when the stop valve needle axially moves to a communication position;

the stop valve needle is provided with a driving connecting part, and the driving connecting part is in adaptive connection with an output shaft of the driving motor;

the stop valve sleeve is in threaded connection with the stop valve needle at a first position, the stop valve sleeve is in sealing connection with the stop valve needle at a second position, and the second position is located between the first position and the controlled pipeline.

Preferably, the drive connection part and the output shaft are in non-coupling fit connection.

Preferably, in a static state of the driving motor, a fit clearance exists between the driving connecting part and the output shaft on a relative rotation path.

Preferably, one of the driving connection portion and the output shaft has a driving connection hole, the other of the driving connection portion and the output shaft has a driving connection end, a circumferential profile of the driving connection hole is greater than a circumferential profile of the driving connection end, a minimum radial length of the driving connection hole is smaller than a maximum radial length of the driving connection end, and the driving connection end is inserted into the driving connection hole.

Preferably, the drive connection hole and the drive connection end have circumferential profiles of the same or similar shape.

Preferably, the stopping portion of the stopping needle is tapered.

A pressure checking device comprises a pressure control pipeline and a controller, wherein the controller is used for controlling the pressure in the pressure control pipeline, the high-pressure stop valve is at least partially arranged in the pressure control pipeline, and the controller is connected with a driving motor.

Preferably, the pressure control pipeline comprises a first pipeline, a second pipeline and a pipeline communication position between the first pipeline and the second pipeline, the pipeline communication position is respectively communicated with the first pipeline and the second pipeline, the extension directions of the first pipeline and the second pipeline are mutually perpendicular, and the high-pressure stop valve is at least partially arranged at the pipeline communication position.

Preferably, the first line is used for communicating a higher pressure source, the second line is used for communicating a lower pressure source, and the stopping part of the stopping valve needle is opposite to the first line.

Preferably, the pipeline communication part is detachably provided with a stop valve core, the stop valve core comprises a valve core through hole positioned in the middle of the stop valve core, one end of the valve core through hole is communicated with the first pipeline, and the other end of the valve core through hole is opposite to the stopping part of the stop valve needle.

Has the advantages that:

the stop valve has the advantages that firstly, the volume is small, the integration level is high, the motor output shaft can directly drive the stop valve needle, and meanwhile, the stop valve needle is integrated with functions of a transmission thread, a motor connecting part (a driving connecting part) and the like, so that the space of the stop valve is more compact, and the stop valve is convenient to apply to small or portable equipment;

the working pressure is high, the stop valve needle can be allowed to have a smaller diameter in the embodiment, so that the movement resistance of the stop valve needle is smaller, and meanwhile, the conical surface sealing structure in the optimized scheme enables the stop part of the stop valve needle to bear higher pressure;

thirdly, the control is convenient, the stop valve can be opened and closed only by driving the motor to rotate positively and negatively, and the automatic stop valve is conveniently applied to automatic equipment;

fourthly, the thread part is isolated outside the working medium, so that scraps generated by thread abrasion are prevented from polluting the working medium, and the working reliability is improved;

and fifthly, in the optimization scheme, the vulnerable part of the stop valve core is an independent part and is pressed on the valve island by the stop valve sleeve/the stop valve needle, so that the stop valve core is easy to replace and maintain.

Drawings

Fig. 1 is a schematic cross-sectional view of an example high-pressure cutoff valve in a cutoff state.

FIG. 2 is a cross-sectional schematic view of an exemplary high pressure shut-off valve communication condition.

FIG. 3 is a cross-sectional schematic view of an exemplary high pressure shut-off valve shown in a disengaged condition from a pressure check device.

Fig. 4 is a graph showing the change in drive motor current from start-up to normal operation.

Fig. 5 is a schematic diagram illustrating an exemplary non-coupled structure of the drive connection portion and the output shaft.

Fig. 6 is a schematic view (from an axial perspective) of yet another exemplary non-coupled arrangement of the drive connection and the output shaft.

Fig. 7 is a schematic view (in axial view) of a further exemplary non-coupled arrangement of the drive connection and the output shaft.

Fig. 8 is a schematic view (in axial view) of a further exemplary non-coupled arrangement of the drive connection and the output shaft.

Fig. 9 is a schematic view (in axial view) of a further exemplary non-coupled arrangement of the drive connection and the output shaft.

FIG. 10 is a cross-sectional view of a portion of an exemplary pressure verification device with a high pressure stop valve.

Fig. 11 is a schematic structural view of an example high-pressure shutoff valve.

FIG. 12 is a schematic diagram of an exemplary pressure verification device connection.

Reference numerals: 100. the stop valve comprises a stop valve needle, 110, a driving connecting part, 111, a slave driving plate, 112, a slave driving plate group, 113, a first driving connecting hole, 114, a first driving plate, 115, a second driving connecting hole, 116, a third driving connecting end, 200, a stop valve sleeve, 300, a driving motor, 310, an output shaft, 311, a main driving plate, 312, a main driving plate group, 313, a first driving block, 315, a second driving connecting end, 316, a third driving connecting hole, 410, a first position, 420, a second position, 430, a first sealing ring, 440, a second sealing ring, 500, a valve island, 501, a stop valve mounting groove, 510, a first pressure pipeline, 520, a second pressure pipeline, 600, a stop valve core, 610 and a valve core through hole.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, and procedures have not been described in detail so as not to obscure the present invention. The figures are not necessarily drawn to scale.

The pressure calibration device provided by the specific embodiment is a portable device, and has the technical advantages of relatively small volume, relatively light weight and strong portability compared with the prior art, particularly similar products in the market, so that the pressure calibration device is suitable for pressure calibration operation under the field working condition; the pressure verification device is a device which is used for pressure verification operation and generates and provides calibration pressure in the process of the pressure verification operation, generally, if the pressure verification device is only used for providing the calibration pressure, the pressure verification device can be a pressure controller, and if the pressure verification device is not only used for providing the calibration pressure, but also has a standard pressure measurement function, the pressure verification device can be a pressure calibrator.

Detailed description of the preferred embodiment

As shown in fig. 1, 2 and 3, a high pressure stop valve for a pressure check device includes a stop valve needle 100 and a stop valve sleeve 200, the stop valve needle 100 and the stop valve sleeve 200 are fixedly arranged at a position of a pipeline to be controlled, the stop valve sleeve 200 is sleeved on the stop valve needle 100, the stop valve needle 100 can axially move relative to the stop valve sleeve 200, when the stop valve needle 100 axially moves to the stop position (as shown in fig. 1), a controlled pipeline is stopped but not communicated, and when the stop valve needle 100 axially moves to the communication position (as shown in fig. 2), the controlled pipeline is communicated.

The high-pressure stop valve is used for controlling the stop valve needle 100, and is also provided with a driving motor 300, wherein the driving motor 300 is provided with an output shaft 310.

The shut-off valve needle 100 is provided with a driving connection part 110, and the driving connection part 110 is fittingly connected with an output shaft 310 of the driving motor 300, so that after the driving motor 300 is started, the output shaft 310 rotates, and the shut-off valve needle 100 is further driven to rotate.

The stopping valve sleeve 200 and the stopping valve needle 100 are in threaded connection at a first position 410, the stopping valve sleeve 200 and the stopping valve needle 100 are in sealing connection at a second position 420, the first position 410 is located between the driving connection part 110 and the second position 420, the second position 420 is located between the first position 410 and the controlled pipeline, and the first position 410 (i.e. the threaded connection position of the stopping valve sleeve 200 and the stopping valve needle 100) and the controlled pipeline are separated in an airtight/liquid-tight manner through the relative position arrangement of the first position 410 and the second position 420.

In the installed state, the high-pressure stop valve and the pressure control pipeline (including the pressure control pipeline) are arranged in a matching way, specifically, the pressure control pipeline comprises a valve island 500, a first pressure pipeline 510 and a second pressure pipeline 520, the valve island 500 is provided with a stop valve installation groove 501, the inner contour of the stop valve installation groove 501 is at least partially matched with the outer contour of the stop valve sleeve 200, so that the shut-off valve housing 200 can be disposed just inside the shut-off valve installation groove 501, the first pressure line 510 and the second pressure line 520 are communicated to the shut-off valve installation groove 501 from different positions respectively, and the communication position of the two pressure lines (210, 220) and the arrangement position of the shut-off valve housing 200 do not coincide, the shut-off valve housing 200 and the shut-off valve installation groove 501 are sealingly connected at least between partial positions, and the communication position of the first pressure line 510 and the shut-off valve installation groove 501 is directed toward the shut-off valve needle 100.

In the operating state, the angular velocity or angular displacement of the driving motor 300 at the rated power is controllable, for example, the stepping motor is controlled by the stepping driver to operate according to a specific step angle, the servo motor is controlled by the rotor to rotate by a controlled angle within the encoder precision range, other motors have similar functions, which are not listed, the rotation speed (angular velocity) of the driving motor 300 is set to ω, the stop valve needle 100 and the output shaft 310 are connected in a matching manner, the number of turns of the stop valve needle 100 and the output shaft 310 is the same, and is set to p ω, wherein p represents a reduction ratio, when the driving motor 300 is not provided with a device for adjusting the torque and rotation speed ratio such as a speed reducer, p is 1, the displacement length of the stop valve needle 100 at the stop position and the communication position can be measured/set to L according to the manufacturing parameters, the pitch at the aforementioned first location 410 can be measured/set to l according to manufacturing parameters, resulting in the following equation 1:

p ω t · L ═ L formula 1

According to formula 1, the value of t or ω t is calculated, and then the driving motor 300 can be controlled by corresponding to the electrical signals such as control current/voltage/frequency.

If the shut-off valve needle 100 is located at the shut-off position (as shown in fig. 1), the shut-off portion of the shut-off valve needle 100 just blocks the communication position between the first pressure line 510 and the shut-off valve installation groove 501, so that the first pressure line 510 and the second pressure line 520 are shut off and not communicated with each other, and at this time, the control driving motor 300 rotates in the reverse direction for ω t turns, the shut-off valve needle 100 moves just from the shut-off position to the communication position (as shown in fig. 2), and the first pressure line 510 communicates with the shut-off valve installation groove 501, so that the first pressure line 510 communicates with the second pressure line 520, and at this time, the control driving motor 300 rotates in the forward direction for ω t turns, and the shut-off valve needle 100 moves just from the communication position to the shut-off position.

It should be noted that the foregoing control method for the driving motor 300 can be derived by those skilled in the art based on the foregoing technical solutions of structure and connection relationship, without any creative effort, and other possible control methods in the prior art are not listed in this specific embodiment.

Since the high pressure stop valve is not continuously switched between the two states of stop/communication, but is continuously stabilized in the stop state for a period of time and is continuously stabilized in the communication state for another period of time, the driving motor 300 for controlling the stop valve needle 100 generally operates in a state of being stationary for a period of time, being started and rotating forward/backward for a period of time, being stationary for another period of time, and so on.

The research on the above process shows that a large starting power exists during the process from the static state to the start of the operation of the driving motor 300, and the driving motor 300 controlled by a constant voltage is taken as an example, as shown in fig. 4, wherein the horizontal axis represents the driving motor300 with the vertical axis representing the input current to the drive motor 300, it has been found that the drive motor 300 does not begin to operate immediately after being energized, but rather there is a short period of time (i.e., 0-t in the figure) similar to overcoming the inertia of a stationary state ₁ Interval) during which the input current is gradually increased to I ₁ (also known as the startup current), from t ₁ At the beginning of the time, the driving motor 300 starts to rotate (forward or reverse), and the input current starts to decrease until it is substantially stabilized at I ₂ (also referred to as load operating current), the startup current is significantly greater than the load operating current.

Further research has found that in the case of constant voltage control, the input current or input power is correlated with the load condition of the driving motor 300, the larger the load, the larger the starting current and load operating current required by the driving motor 300, and the smaller the load, the smaller the starting current and load operating current required by the driving motor 300, and theoretically, in the case of no load (i.e., the driving motor 300 has no load), the starting current and load operating current can be minimized.

On the basis of the foregoing technical solution, if the adaptive connection between the driving connection portion 110 and the output shaft 310 is a coupled fixed connection, at the beginning of starting, the output shaft 310 needs to drive the stop valve needle 100 to rotate, so that the driving motor 300 needs a large starting current to drive the driving motor 300 to drive the stop valve needle 100 to rotate, and thus the large starting current brings a great pressure to a power supply line of the entire pressure calibration device (although the current only needs to last for a short time), even exceeds the maximum allowable current of the entire pressure calibration device, thereby causing circuit damage; in order to solve this problem, it is necessary to reduce the load of the driving motor 300, and more particularly, to reduce the torque required to drive the rotation of the check valve needle 100; as can be seen from the foregoing, the resistance to rotation of the stop valve needle 100 mainly comes from two sources, one is the resistance generated at the first position 410, which is related to the thread coupling condition of the stop valve needle 100 and the stop valve sleeve 200 at the first position 410, the better the thread coupling condition is, the larger the resistance is, and the other is the resistance generated at the second position 420, which is related to the sealing effect of the stop valve needle 100 and the stop valve sleeve 200 at the second position 420, the better the sealing effect is, the larger the resistance is; from the foregoing analysis, in order to solve the problem of large starting current in the case of coupling (fixing) connection between the driving connection portion 110 and the output shaft 310, the improvement requires conditional accepting or rejecting the structure matching condition of the first position 410 and/or the sealing matching condition of the second position 420, and the lower starting current can be obtained by appropriately reducing the structure matching effect of the first position 410 and/or the sealing matching effect of the second position 420.

The present exemplary embodiment, which represents a modified concept different from the foregoing, does not start from reducing the torque required for rotating the drive shut-off valve needle 100, but starts from an adaptive connection of the drive connection 110 and the output shaft 310, specifically, the adaptive connection of the drive connection 110 and the output shaft 310 is decoupled, or the drive connection 110 and the output shaft 310 are decoupled adaptive.

The decoupled adaptive connection structure means that the adaptive connection structure of the driving connection part 110 and the output shaft 310 is not tightly matched (i.e. a so-called coupling structure), but has a proper matching gap, and the matching gap exists on the relative rotation path of the output shaft 310/the driving connection part 110, so that, on one hand, the output shaft 310/the driving connection part 110 is not contacted (is not contacted with the force certainly under the condition of no contact) on the relative rotation path unless the output shaft 310 rotates for a certain angle to overcome the matching gap, and on the other hand, the matching gap is overcome after the output shaft 310 rotates for a certain angle, and after the matching gap is eliminated, the influence is not generated in the continuous rotation process in the same direction; such a design, combined with the normal operating conditions of the drive motor 300 and the check valve needle 100 in the solution, can produce unexpected technical effects.

Specifically, the fit clearance between the output shaft 310 and the drive connection portion 110 in the forward rotation path in the initial state is set to C ₁ The fit clearance between the output shaft 310 and the drive connection 110 on the reverse rotation path is C ₂ (C ₁ And C ₂ Size does not affect implementation of the scheme).

In one of the initialization situations, if the stop valve needle 100 is located between the stop position and the communication position in the initial state, the initialized control driving motor 300 rotates in the forward direction, and the driving motor 300 starts to start, at this time, since the output shaft 310 and the driving connection part 110 have a fit clearance on the forward rotation path, the driving motor 300 is in the idle state, and the start current thereof is small (much smaller than the start current in the case of a load), until the driving motor 300 starts to rotate, the output shaft 310 rotates by a certain angle, and the fit clearance C exists ₁ At this time, the output shaft 310 and the driving connection part 110 are completely adaptive to the force when rotating in the forward direction, and then the stop valve needle 100 can be driven to the stop position according to a general control scheme, when the stop valve needle 100 reaches the stop position, the driving motor 300 stops rotating, the corresponding output shaft 310 and the driving connection part 110 also stop rotating, at this time, the output shaft 310 and the driving connection part 110 have no fit clearance on the forward rotation path, and the fit clearance on the reverse rotation path is C ₁ +C ₂ 。

In the second initialization situation, if the stop valve needle 100 is located between the stop position and the communicating position in the initial state, the initialized control driving motor 300 rotates in the reverse direction, and the driving motor 300 starts to start, at this time, since the output shaft 310 and the driving connection part 110 have a fit clearance on the reverse rotation path, the driving motor 300 is in the idle state, and the start current thereof is small (much smaller than the start current in the case of load), until the driving motor 300 starts to rotate, the output shaft 310 rotates by a certain angle, and the fit clearance C exists ₂ At this time, the output shaft 310 and the driving connection part 110 are completely adaptive to and stressed when rotating in the reverse direction, and subsequently, the stop valve needle 100 can be driven to the communication position according to a general control scheme, when the stop valve needle 100 reaches the communication position, the driving motor 300 stops rotating, the corresponding output shaft 310 and the driving connection part 110 also stop rotating, at this time, the output shaft 310 and the driving connection part 110 have no fit clearance on the reverse rotation path, and the fit clearance on the forward rotation path is C ₁ +C ₂ 。

In the third initialization state, if the stop valve needle 100 is located at the stop position in the initial state, the initialized control driving motor 300 rotates in the reverse direction, and the subsequent process may refer to the second initialization state, and finally, the stop valve needle 100 is located at the communicating position, the driving motor 300 is stationary (stops rotating), the output shaft 310 and the driving connection portion 110 have no fit clearance on the reverse rotation path, and the fit clearance on the forward rotation path is C ₁ +C ₂ 。

Fourth of the initialization conditions, if the shut-off valve needle 100 is located at the communication position in the initial state, the initialized control driving motor 300 rotates in the forward direction, and the subsequent process may refer to one of the initialization conditions, and finally, the shut-off valve needle 100 is located at the shut-off position, the driving motor 300 is stationary (stops rotating), the output shaft 310 and the driving connection portion 110 have no fit clearance on the forward rotation path, and the fit clearance on the reverse rotation path is C ₁ +C ₂ 。

After initialization, the high pressure shut-off valve may be in one of two states: firstly, the high-pressure stop valve is in a stop state, and the output shaft 310 and the driving connection part 110 have a fit clearance on a reverse rotation path, at this time, it can be determined that the control appeal for the next high-pressure stop valve is inevitably to be switched to a connected state, and the high-pressure stop valve is controlled to be switched to the connected state, and the driving motor 300 needs to be controlled to rotate reversely, so that before the fit clearance is overcome, the driving motor 300 is in an idle state, and a large starting current cannot be generated; secondly, the high-pressure stop valve is in a communicating state, and the output shaft 310 and the driving connection portion 110 have a fit clearance on a forward rotation path, at this time, it can be determined that the control appeal for the high-pressure stop valve next time is inevitably to switch to a cut-off state, and the driving motor 300 needs to be controlled to rotate forward to control the high-pressure stop valve to switch to the cut-off state, so that before the fit clearance is overcome, the driving motor 300 is in an idle state, and a large starting current cannot be generated.

On the basis of the design concept and scheme, the decoupled adaptive connection structure can have various more detailed variation possible structures.

In one of the possible variations, at least a portion of each of the driving connection portion 110 and the output shaft 310 is disposed adjacent to each other, and the adjacent portions of the driving connection portion 110 and the output shaft 310 are only close to each other before the driving motor 300 rotates, and when the output shaft 310 rotates, the driving connection portion 110 is forced to be driven by the output shaft 310 because at least a portion of the driving connection portion 110 is located within a rotation range of the output shaft 310, and then the driving connection portion and the output shaft rotate together to form an obvious adaptive connection relationship.

Illustratively, as shown in fig. 5, the arrow direction in the figure indicates the axial direction of the driving connection part 110 and the output shaft 310, the output shaft 310 rotates along the axial center when operating, the driving connection part 110 is provided with a slave driving plate 111 at the end opposite to the output shaft 310, correspondingly, the output shaft 310 is provided with a master driving plate 311 at the end opposite to the driving connection part 110, when the driving motor 300 and the check valve needle 100 are both provided in the pressure verification device, the master driving plate 311 and the slave driving plate 111 are adjacently arranged, the distance between the master driving plate 311 and the slave driving plate 111 is short enough, so that the slave driving plate 111 is positioned within the rotation range of the master driving plate 311 after the master driving plate 311 starts to rotate, so that the slave driving plate 111 can be continuously driven by the master driving plate 311 in a single rotation (the single rotation means continuous and rotating in one direction), and both rotate together.

In the second variation, the driving connection portion 110 and the output shaft 310 are at least partially disposed adjacent to each other, and the adjacent portions of the two have a certain mutual matching structure, and the matching is non-tightly coupled (i.e., there is an obvious matching gap), and compared with the first variation, the second variation has a relatively obvious but loose matching relationship, and when the output shaft 310 rotates, the matching relationship changes into a force-receiving matching relationship after overcoming the matching gap, and then the two rotate together.

Illustratively, as shown in fig. 6, in order to better show the matching relationship between the master drive plate group 312 and the slave drive plate group 112, the drive connection portion 110 and the output shaft 310 are not shown in the drawing, the drive connection portion 110 is provided with the slave drive plate group 112 in an "i" shape at the end opposite to the output shaft 310, correspondingly, the output shaft 310 is provided with the master drive plate group 312 in an "i" shape at the end opposite to the drive connection portion 110, when the drive motor 300 and the stop valve needle 100 are both disposed in the pressure verification device, the master drive plate group 312 and the slave drive plate group 112 are inserted in a matching manner with each other with a significant gap therebetween, when the drive motor 300 is started, no force is applied between the master drive plate group 312 and the slave drive plate group 112, when the drive motor 300 starts to rotate, the master drive plate group 312 also starts to rotate, after overcoming the matching gap, the master drive plate group 312 and the slave drive plate group 112 are in forced contact, the slave set of drive plates 112 continuously rotate as the master set of drive plates 312 rotate during a single rotation.

As another example, as shown in fig. 7, the driving connection portion 110 is provided with a first driving connection hole 113 at an end portion thereof opposite to the output shaft 310, a first driving plate 114 is provided in the first driving connection hole 113, the first driving plate 114 extends in a radial direction of the first driving connection hole 113, correspondingly, the output shaft 310 is provided with a first driving block 313 at an end portion thereof opposite to the driving connection portion 110, the first driving block 313 is disposed to be offset from an axial center of the output shaft 310, so that when the output shaft 310 rotates, the first driving block 313 performs a circular motion along the axial center of the output shaft 310, when the driving motor 300 and the stop valve needle 100 are both disposed in the pressure verification device, the first driving block 313 is inserted into the first driving connection hole 113, when the driving motor 300 is started, the first driving block 313 and the first driving plate 114/first driving connection hole 113 are not force-connected, and when the driving motor 300 starts to rotate, the first driving block 313 makes a circular motion along the axial center of the output shaft 310, and because the first driving plate 114 extends along the radial direction of the first driving connection hole 113, the first driving plate 114 is located in the circular motion path of the first driving block 313, when the first driving block 313 rotates at most one circle (because the first driving block 313 and the first driving plate 114 both have a volume, a complete circle is not actually needed), the first driving block 313 and the first driving plate 114 are in stressed contact, and in a single rotation process, the first driving block 313 drives the first driving plate 114 to rotate, so that the stop valve needle 100 rotates therewith.

As another example, one of the driving connection part 110 and the output shaft 310 has a driving connection hole, and the other of the driving connection part 110 and the output shaft 310 has a driving connection hole, a circumferential profile of the driving connection hole is greater than a circumferential profile of the driving connection end, the driving connection end is inserted into the driving connection hole, and a minimum radial length of the driving connection hole is smaller than a maximum radial length of the driving connection end; it is further preferred that the drive connection bore and the drive connection end have circumferential profiles of the same or similar shape.

For example, as shown in fig. 8, the second driving connecting hole 115 is formed on the driving connecting portion 110, the opening direction of the second driving connecting hole 115 is aligned with the output shaft 310, the circumferential contour of the second driving connecting hole 115 is a larger ellipse, and correspondingly, the output shaft 310 is provided with the second driving connecting end 315, the second driving connecting end 315 is a smaller ellipse, as shown in the figure, the major axis of the circumferential contour of the second driving connecting hole 115 is larger than the major axis of the circumferential contour of the second driving connecting end 315, the minor axis of the circumferential contour of the second driving connecting hole 115 is larger than the minor axis of the circumferential contour of the second driving connecting end 315, so that the second driving connecting end 315 can be inserted into the second driving connecting hole 115 and can move in the second driving connecting hole 115 without force, the major axis of the circumferential contour of the second driving connecting end 315 is larger than the minor axis of the circumferential contour of the second driving connecting hole 115, therefore, when the output shaft 310 starts to rotate, the second driving connection end 315 rotates idle at a certain angle relative to the first driving connection hole 113, and then the second driving connection end 315 and the second driving connection hole 115 are forced to contact and rotate together.

For another example, as shown in fig. 9, the driving connection portion 110 is provided with a third driving connection end 116, the circumferential contour of the third driving connection end 116 is a smaller rectangle, and correspondingly, the output shaft 310 is provided with a third driving connection hole 316, the opening direction of the third driving connection hole 316 is opposite to the driving connection portion 110, the circumferential contour of the third driving connection hole 316 is a larger diamond, as shown in the figure, the circumferential outer contour of the third driving connection end 116 is smaller than the circumferential inner contour of the third driving connection hole 316, so that the third driving connection end 116 can be inserted into the third driving connection hole 316 and can move in the third driving connection hole 316 without force, the length of the long side of the circumferential contour of the third driving connection end 116 is greater than the length of the short diagonal line of the circumferential contour of the third driving connection hole 316, so that when the output shaft 310 starts to rotate, the third driving connection hole 316 rotates at a certain angle relative to the third driving connection end 116, third drive connection aperture 316 is then forced into contact with third drive connection end 116 and rotates together.

It should be noted that there are many schemes for implementing the decoupling adaptive connection, which are not listed in this embodiment, in short, an adaptive connection structure having a fit gap exists between the driving connection portion 110 and the output shaft 310, and the fit gap can be converted by the rotation of the output shaft 310 at a certain angle, so as to achieve the technical effect that the driving connection portion 110 rotates along with the output shaft 310.

It should be noted that, in some cases, the driving connection portion 110 and the output shaft 310 do not directly achieve the decoupling matching connection relationship, but the intermediate structure, for example, the driving connection portion 110 and the intermediate structure are directly stressed and connected, and the intermediate structure and the output shaft 310 achieve the decoupling matching connection relationship, and this indirect case should also belong to the decoupling matching connection relationship described in this embodiment, or it can be regarded as a part of the extension of the driving connection portion 110 or the output shaft 310 according to the direct stress condition of the intermediate structure.

Other improvements further include that the cut-off part of the shut-off valve needle 100 is conical, and the structural form of the conical shape is described in detail, the cut-off part of the shut-off valve needle 100 has a smaller outer diameter at a part close to or tending to the shut-off position, and the cut-off part of the shut-off valve needle 100 has a larger outer diameter at a part close to or tending to the communication position.

In this embodiment, a pressure calibration apparatus using the high pressure stop valve in each of the above examples is further provided, where the pressure calibration apparatus includes a pressure control line and a controller, where the high pressure stop valve is at least partially disposed in the pressure control line, and the controller is respectively connected to a pressure control mechanism in the pressure control line and a driving motor in the high pressure stop valve, so that the controller controls the calibration pressure according to a preset control method.

Specifically, as shown in fig. 10, the pressure control line includes a first pressure line 510, a second pressure line 520, and a shut-off valve installation groove 501, the shut-off valve installation groove 501 is communicated with the first pressure line 510 and the second pressure line 520, respectively, the first pressure line 510 and the second pressure line 520 extend in directions perpendicular to each other, and the shut-off valve needle 100 and the shut-off valve sleeve 200 in the high pressure shut-off valve are cooperatively arranged at the position of the shut-off valve installation groove 501.

The purpose of the aforesaid design lies in, can arrange high pressure stop valve and relevant pressure line in the corner of pressure calibration equipment or pressure control pipeline structure, effectively utilized corner space, can make the structure of whole pressure calibration equipment more compact, corresponding less volume, promote the portability.

In a further modification, as shown in fig. 10, in order to facilitate the pipe arrangement at the corner position, a special pipe arrangement structure may be designed, for example, a valve island 500 structure is designed, as shown in the figure, a first pressure pipe 510 and a second pressure pipe 520 extending perpendicular to each other are provided in the valve island 500, and a stop valve installation groove 501 is provided at a position where the two pressure pipes (510,520) communicate, and the stop valve sleeve 200 and the stop valve installation groove 501 are connected in a sealing manner.

The purpose of the aforesaid design is to make the high pressure stop valve wholly modularized on the one hand, and at manufacturing assembly pressure calibration equipment, only need be connected to the pipeline respectively first pressure pipeline 510 and second pressure pipeline 520 kneck on valve island 500 can accomplish the pipeline and arrange, and on the other hand, the design of valve island 500 part can be so that, when facing the part that uses the same high pressure stop valve in the middle of the different pressure control pipeline, need not repeated die sinking to the pipeline structure, saves the design cost.

In a further modification, as shown in fig. 10, in order to make the high-pressure cutoff valve better utilized, a first pressure line 510 is used for communicating a higher pressure source, a second pressure line 520 is used for communicating a lower pressure source, and a cutoff portion of the cutoff valve needle 100 is directly opposite to the first pressure line 510.

The above design aims to reduce the influence of the pressure difference between the two sides (high pressure side and low pressure side) of the high pressure stop valve on the high pressure stop valve itself by utilizing the rigidity of the structure of the stop valve needle 100 itself to the maximum extent (when the stop portion of the stop valve needle 100 is tapered, the embodiment is more obvious), and achieve the technical effect of protecting the stop valve needle 100.

In a further modification, as shown in fig. 10, in order to make the high pressure cut-off valve better utilized, a cut-off valve core 600 is disposed in the cut-off valve installation groove 501, a core through hole 610 is disposed on the cut-off valve core 600, one end of the core through hole 610 is communicated with the first pressure pipeline 510, and a needle of the cut-off valve needle 100 is opposite to the other end of the core through hole 610.

The purpose of the foregoing design is that direct contact between the shutoff valve needle 100 and the valve island 500 can be avoided by the shutoff valve cartridge 600, on the one hand, the shutoff valve needle 100 can be effectively protected, and on the other hand, damage is relatively likely to occur due to the position of the shutoff valve cartridge 600, and the mechanism of this example separates the shutoff valve cartridge 600 from the valve island 500, and can be relatively easily detached from and replaced by the high-pressure shutoff valve, so that replacement of the shutoff valve cartridge 600 as a vulnerable component is possible, and maintenance difficulty and maintenance cost for the valve island 500 and the high-pressure shutoff valve as a whole are reduced.

Detailed description of the invention

As shown in fig. 11, the high pressure cutoff valve for the pressure verification apparatus includes a cutoff valve needle 100, a cutoff valve sleeve 200, a driving motor 300, a valve island 500, and a cutoff valve core 600.

A first pressure pipeline 510 and a second pressure pipeline 520 which are perpendicular to each other are arranged in the valve island 500, a stop valve installation groove 501 is arranged at one end of the valve island 500, and the stop valve installation groove 501 is respectively communicated with the first pressure pipeline 510 and the second pressure pipeline 520 at different positions.

The shut off spool 600 is disposed in the shut off valve installation groove 501, and the shut off spool 600 includes a spool through hole 610 therethrough, and more particularly, the shut off spool 600 is disposed near a position where the first pressure line 510 and the shut off valve installation groove 501 communicate, one end of the spool through hole 610 is directed to the first pressure line 510, and the shut off spool 600 is sealingly connected to the spool 500 near the spool through hole 610, so that the working medium in other positions of the shut off valve installation groove 501 cannot enter the first pressure line 510 through the shut off spool 600 and the working medium in the first pressure line 510 cannot enter other positions of the shut off valve installation groove 501 through the shut off spool 600 unless passing through the spool through hole 610.

The cut-off valve housing 200 is fittingly installed in the cut-off valve installation groove 501, and a first sealing ring 430 is provided between the cut-off valve housing 200 and the cut-off valve installation groove 501, so that the cut-off valve housing 200 and the cut-off valve installation groove 501 are sealingly connected to each other, and the working medium in the cut-off valve installation groove 501 cannot flow out of the cut-off valve installation groove 501 through the connection position between the cut-off valve housing 200 and the cut-off valve installation groove 501.

The cut-off valve needle 100 is fittingly inserted into the cut-off valve sleeve 200, the cut-off portion of the cut-off valve needle 100 is tapered and faces the cartridge through hole 610, and at least a portion of the cut-off valve needle 100 has an outer diameter larger than that of the cartridge through hole 610, so that when the cut-off valve needle 100 is inserted into the cartridge through hole 610 to a sufficient depth, the cut-off valve needle 100 and the cartridge through hole 610 are hermetically connected; at the first position 410, the stop valve needle 100 and the stop valve sleeve 200 are in threaded connection, and the relative rotational movement of the stop valve needle 100 and the stop valve sleeve 200 can be converted into relative axial movement through a threaded connection structure; the second packing 440 is provided between the check valve needle 100 and the check valve housing 200, so that the check valve needle 100 and the check valve housing 200 are hermetically connected, specifically, the second packing 440 is located between the first position 410 and the check valve core 600, the working medium in the check valve mounting groove 501 cannot reach the first position 410 through the second packing 440 due to the arrangement of the second packing 440, and impurities generated at the first position 410 due to abrasion and the like cannot be mixed into the working medium in the check valve mounting groove 501 through the second packing 440.

The shut-off valve needle 100 is provided with a drive connection 110 at an end facing away from the shut-off valve cartridge 600, and correspondingly, the drive motor 300 is arranged at the shut-off valve needle 100 on the side facing away from the shut-off valve cartridge 600, the output shaft 310 of the drive motor 300 is in non-coupling fit connection with the drive connection 110, and a fit gap exists between the non-coupling fit connection structure of the output shaft 310 and the drive connection 110.

In the operating state, as shown in the drawing, when the shutoff valve needle 100 and the shutoff valve body 600 are sealingly connected, the working medium is communicated from the second pressure line 520 into the shutoff valve installation groove 501, and at this time, since the shutoff valve body 600 and the valve land 500 are in close contact and the end of the valve body passage hole 610 exposed in the shutoff valve installation groove 501 is sealed by the shutoff valve needle 100, the working medium cannot enter the first pressure line 510 from the second pressure line 520, and similarly, the working medium in the first pressure line 510 cannot enter the second pressure line 520, and the shutoff between the first pressure line 510 and the second pressure line 520 is realized.

At this time, if communication between the first pressure pipeline 510 and the second pressure pipeline 520 is required, and the driving motor 300 is powered on, because the output shaft 310 and the driving connection portion 110 are in non-coupling adaptive connection, no force is applied between the output shaft 310 and the driving connection portion 110, the driving motor 300 is in an idle state, the driving motor 300 can start to rotate by a low starting current (for convenience of description, the rotation direction at this time is set to be reverse direction), after the output shaft 310 rotates in reverse direction by a certain angle, the fit clearance between the output shaft 310 and the driving connection portion 110 in the reverse direction relative rotation is converted (in reference to the case of the first embodiment, at this time, the fit clearance between the reverse direction relative rotation is converted into the fit clearance between the forward direction relative rotation), the driving motor 300 is continuously controlled according to a preset control program, and the driving motor 300 continuously rotates in reverse direction, the output shaft 310 continuously and continuously rotates in the opposite direction to drive the driving connection portion 110 and the stop valve needle 100 to rotate in the opposite direction, the stop valve needle 100 rotates in the opposite direction relative to the stop valve sleeve 200, due to the threaded connection between the stop valve needle 100 and the stop valve sleeve 200, the relative rotation between the stop valve needle 100 and the stop valve sleeve 200 is simultaneously converted into an axial relative movement, specifically, the relative rotation in this direction causes the stop valve needle 100 to move in the direction of the communication position (i.e., the direction a in the drawing) relative to the stop valve sleeve 200, the driving motor 300 is continuously controlled according to a preset control program until the stop valve needle 100 moves axially to the communication position, the driving motor 300 stops rotating, the power is turned off, and correspondingly, the output shaft 310 and the stop valve needle 100 also stop rotating.

Then, if it is necessary to cut off (i.e. not connect) the first pressure line 510 and the second pressure line 520, the driving motor 300 is powered on again, because the fit clearance between the forward relative rotations generated in the process exists, the output shaft 310 and the driving connection portion 110 are still in the non-coupled fit connection, the output shaft 310 and the driving connection portion 110 are not stressed, the driving motor 300 is in the no-load state, the driving motor 300 can start to rotate in the forward direction by a low start current, after the output shaft 310 rotates in the forward direction by a certain angle, the fit clearance between the forward relative rotations of the output shaft 310 and the driving connection portion 110 is converted (refer to the case of the first embodiment, at this time, the fit clearance between the forward relative rotations is converted into the fit clearance between the reverse relative rotations), the driving motor 300 is continuously controlled according to the preset control program, the driving motor 300 continuously rotates in the forward direction, the output shaft 310 continuously and continuously rotates in the forward direction to drive the driving connection portion 110 and the stop valve needle 100 to rotate in the forward direction, the stop valve needle 100 rotates in the forward direction relative to the stop valve housing 200, and due to the threaded connection between the stop valve needle 100 and the stop valve housing 200, the relative rotation between the stop valve needle 100 and the stop valve housing 200 is simultaneously converted into an axial relative movement, specifically, the relative rotation in this direction can make the stop valve needle 100 move in the direction of the stop position (i.e., the direction opposite to the direction a in the figure) relative to the stop valve housing 200, and the driving motor 300 is continuously controlled according to the preset control program until the stop valve needle 100 axially moves to the stop position (i.e., the position in figure 11), the driving motor 300 stops rotating, and the output shaft 310 and the stop valve needle 100 correspondingly stop rotating when power is turned off.

The high-pressure stop valve of the technical scheme of the specific embodiment has small volume and high working pressure, and is suitable for small-sized high-pressure automatic hydraulic equipment (such as the pressure calibration device of the specific embodiment).

As shown in fig. 12 (the connection lines in the figure represent the gas circuit connection or the liquid circuit connection allowing the working medium to pass through), the pressure verification device includes a first pressure control channel 710, a second pressure control channel 720 and a pressure output channel 730, the pressure output channel 730 is provided with a plurality of pressure output interfaces 731, the pressure output interfaces 731 are used for communicating with the pressure device 800 to be verified so as to provide verification pressure for the pressure device 800 to be verified, a pressure input end of the first pressure control channel 710 communicates with a first pressure generating device 711, a pressure output end of the first pressure control channel 710 communicates with the pressure output channel 730 through a first stop valve 712, a pressure input end of the second pressure control channel 720 communicates with a second pressure generating device 721, a pressure output end of the second pressure control channel 720 communicates with the pressure output channel 730 through a second stop valve 722, and a controller respectively communicates with the first stop valve 712, the second stop valve 730, the pressure output end of the second pressure control channel 720 communicates with the pressure output channel 730, The second shut-off valve 722 and the pressure control mechanisms in the first pressure control passage 710/the second pressure control passage 720 are connected to perform control; the first cutoff valve 712 and the second cutoff valve 722 are high-pressure cutoff valves of the foregoing examples.

In an operating state, when the check pressure to be provided is within a first pressure range, the controller controls the first stop valve 712 to be in a communication state, controls the second stop valve 722 to be in a stop state, and outputs the pressure from the first pressure control channel 710 to the pressure output channel 730, and when the check pressure to be provided is within a second pressure range, the controller controls the first stop valve 712 to be switched to the stop state, controls the second stop valve 722 to be in the communication state, and outputs the pressure from the second pressure control channel 720 to the pressure output channel 730.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. For example, in practical applications, the above module functions may be divided into different functional structures different from the embodiments of the present invention according to different needs, or several functional modules in the embodiments of the present invention may be combined and decomposed into different functional structures. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, unless explicitly stated or otherwise clear to a person skilled in the art from the relevant description that the word "comprising" does not exclude other elements or steps, the singular does not exclude the plural, the expressions "first XX", "second XX", and the like do not indicate a limited number or a selected order, and a plurality of elements or means recited in the system claims may also be implemented by one element or means in software or hardware.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A high-pressure stop valve is used for a pressure calibration device and comprises a stop valve needle and a stop valve sleeve, wherein the stop valve sleeve is arranged on the stop valve needle, a controlled pipeline is stopped when the stop valve needle axially moves to a stop position, and the controlled pipeline is communicated when the stop valve needle axially moves to a communication position;

the stop valve needle is provided with a driving connecting part, and the driving connecting part is in adaptive connection with an output shaft of the driving motor;

the stop valve sleeve is in threaded connection with the stop valve needle at a first position, the stop valve sleeve is in sealing connection with the stop valve needle at a second position, and the second position is located between the first position and the controlled pipeline.

2. The high pressure shut-off valve of claim 1, wherein the drive connection and the output shaft are non-coupled in mating connection.

3. The high pressure shut-off valve of claim 2, wherein the drive connection and the output shaft have a mating clearance in the path of relative rotation when the drive motor is at rest.

4. The high pressure shut-off valve of claim 3, wherein one of the drive connection portion and the output shaft has a drive connection hole, the other of the drive connection portion and the output shaft has a drive connection end, the drive connection hole has a circumferential profile greater than a circumferential profile of the drive connection end, and a minimum radial length of the drive connection hole is less than a maximum radial length of the drive connection end, the drive connection end being inserted in the drive connection hole.

5. The high pressure shut-off valve of claim 4, wherein the drive connection bore and the drive connection end have the same or similar circumferential profile in shape.

6. The high pressure shut-off valve according to any one of claims 1 to 5, wherein the shut-off portion of the shut-off valve needle is tapered.

7. A pressure checking apparatus comprising a pressure control line and a controller for controlling the pressure in the pressure control line, characterized in that a high pressure shut-off valve according to any one of claims 1-6 is at least partly arranged in the pressure control line, the controller being connected to the drive motor.

8. The pressure verification apparatus of claim 7, wherein the pressure control line comprises a first line, a second line, and a line communication therebetween, the line communication being communicated with the first line and the second line, respectively, the first line and the second line extending in directions perpendicular to each other, the high pressure shut-off valve being at least partially disposed at the line communication.

9. The pressure verification apparatus of claim 8, wherein the first line is adapted to communicate with a higher pressure source, the second line is adapted to communicate with a lower pressure source, and the stop portion of the stop valve needle is directly opposite the first line.

10. The pressure verifying apparatus according to any one of claims 8 to 9, wherein the pipeline communicating portion is detachably provided with a cut-off valve cartridge, the cut-off valve cartridge includes a cartridge through hole located at a middle portion thereof, one end of the cartridge through hole communicates with the first pipeline, and the other end of the cartridge through hole faces a cut-off portion of the cut-off valve needle.

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