A double multi-way valve injection drive device

Abstract

The present invention relates to the technical field of drive devices, and provides a dual multi-way valve injection drive device including a device body, wherein the device body includes a motor transmission unit, and the motor transmission unit is connected to a motor; the motor transmission unit is also connected to a dual valve linkage unit; the dual valve linkage unit is also respectively connected to a first multi-way valve and a second multi-way valve. The motor of the technical solution drives the motor transmission unit to rotate, and a motor can synchronously drive the injection mode of the first multi-way valve and the second multi-way valve, thereby realizing the start and stop of a motor, so the injection driving mode balances the injection time without deviation.

Description

Technical Field

[0001] The invention relates to the technical field of drive devices, and in particular to a double multi-way valve injection drive device. Background Art

[0002] Gas chromatography is widely used in the detection of volatile and semi-volatile compounds. In the prior art, a gas chromatograph, a sample pretreatment device and an automatic sample injector need to be used together. In order to improve the detection efficiency, dual-channel injection is often used, that is, the sample pretreatment device and the automatic sample injector use dual channels to inject samples into the gas chromatograph at the same time.

[0003] For sample pretreatment equipment in the prior art, dual-path injection generally uses two motors to drive two multi-way valves for injection. This method is relatively cumbersome to control, and it is difficult to ensure that the two motors start and stop synchronously, so this injection driving method has injection time deviation.

[0004] How to effectively solve the above technical problems is a problem that those skilled in the art need to solve. Summary of the invention

[0005] In order to solve the above technical problem or at least partially solve the above technical problem, the present invention provides a dual multi-way valve injection drive device.

[0006] The double multi-way valve injection driving device comprises a device body, the device body comprises a motor transmission unit, and the motor transmission unit is connected with a motor.

[0007] The motor transmission unit is also connected to a double-valve linkage unit.

[0008] The double-valve linkage unit is also connected to a first multi-way valve and a second multi-way valve respectively.

[0009] Optionally, the motor transmission unit includes a first transmission rod, and a second transmission rod is connected to the first transmission rod away from the motor side.

[0010] The second transmission rod is also connected to a third transmission rod.

[0011] A notch is provided at a connection point between the first transmission rod and the second transmission rod away from the third transmission rod side.

[0012] The end of the first transmission rod away from the second transmission rod is provided with a motor storage groove for connecting the motor.

[0013] Optionally, a bolt hole through which a bolt for fixing the motor passes is provided on the first transmission rod near the motor storage slot.

[0014] The bolt hole is arranged parallel to the second transmission rod.

[0015] Optionally, the first transmission rod and the second transmission rod are vertically connected.

[0016] The second transmission rod and the third transmission rod are vertically connected.

[0017] Optionally, the dual-valve linkage unit includes a first linkage rod connected to the motor transmission unit, and a transmission groove is provided on the first linkage rod.

[0018] The first connecting rod is also connected to a second connecting rod and a third connecting rod respectively.

[0019] Optionally, the transmission groove is connected to the third transmission rod in the motor transmission unit.

[0020] A diameter of the third link rod on a side close to the first link rod is larger than a diameter of the third link rod on a side far from the first link rod.

[0021] Optionally, the first connecting rod and the second connecting rod are vertically connected.

[0022] The first connecting rod and the third connecting rod are vertically connected.

[0023] The second connecting rod and the third connecting rod are 180 degrees apart.

[0024] Optionally, the first multi-way valve includes a valve seat, a valve cover is connected to the valve seat on the side away from the double-valve linkage unit, and a valve core is connected to the valve seat in the valve cover.

[0025] A connecting piece for connecting with the double valve linkage unit is arranged on the valve seat close to the double valve linkage unit side, a valve stem passing through the valve seat and the valve core is arranged on the connecting piece away from the double valve linkage unit side, and a bearing is connected to the end of the valve stem away from the connecting piece side.

[0026] The surface of the bearing away from the valve stem side is connected with an elastic device, and the end of the elastic device away from the bearing side is connected with a fixing plate.

[0027] The second multi-way valve has the same structure as the first multi-way valve.

[0028] Optionally, a limiting portion is provided on the surface of the valve cover close to the bearing side.

[0029] The limiting portion includes a first limiting edge, the first limiting edge is vertically connected to a second limiting edge, and an end of the second limiting edge away from the first limiting edge is vertically connected to a third limiting edge extending toward the fixing plate.

[0030] Optionally, a through hole is provided on the fixing plate.

[0031] The connecting member on the first multi-way valve is connected to the third connecting rod, and the connecting member on the second multi-way valve is connected to the second connecting rod.

[0032] The motor of the present invention drives the motor transmission unit to rotate. When the motor rotates clockwise, the motor transmission unit drives the double-valve linkage unit to rotate clockwise, and the double-valve linkage unit drives the first multi-way valve and the second multi-way valve to rotate clockwise synchronously; when the motor rotates counterclockwise, the motor transmission unit drives the double-valve linkage unit to rotate counterclockwise, and the double-valve linkage unit drives the first multi-way valve and the second multi-way valve to rotate counterclockwise synchronously. The technical solution of the present invention realizes a sampling method in which one motor is started and stopped, and only one motor is used to synchronously drive the first multi-way valve and the second multi-way valve. Therefore, the driving method of the sampling balances the sampling time without deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic cross-sectional structural diagram of the device body provided by the present invention;

[0034] Figure 2 It is a cross-sectional structural schematic diagram of the motor transmission unit provided by the present invention;

[0035] Figure 3 It is a cross-sectional structural schematic diagram of the double-valve linkage unit provided by the present invention;

[0036] Figure 4 It is a schematic cross-sectional structural diagram of the first multi-way valve provided by the present invention.

[0037] Reference numerals:

[0038] 1. Motor transmission unit; 11. Bolt hole; 12. Motor storage slot; 13. First transmission rod; 14. Second transmission rod; 15. Third transmission rod; 16. Notch;

[0039] 2. Double valve linkage unit; 21. First linkage rod; 22. Transmission groove; 23. Third linkage rod; 24. Second linkage rod;

[0040] 3. First multi-way valve; 31. Valve seat; 32. Connector; 33. Valve stem; 34. Valve cover; 341. First limiting edge; 342. Second limiting edge; 343. Third limiting edge; 35. Valve core; 36. Bearing; 37. Elastic device; 38. Through hole; 39. Fixing plate;

[0041] 4. Second multi-way valve;

[0042] 5. Motor. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and examples. It is to be understood that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The following examples are only used to explain the present invention, rather than to limit the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention. If not otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0044] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Terms such as "connection" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] An embodiment provided by the present invention is as follows Figure 1 As shown, a dual multi-way valve injection drive device includes a device body, the device body includes a motor transmission unit 1, and the motor transmission unit 1 is connected to a motor 5.

[0046] The motor transmission unit 1 is also connected to a double-valve linkage unit 2 .

[0047] The double-valve linkage unit 2 is also connected to a first multi-way valve 3 and a second multi-way valve 4 respectively.

[0048] In this embodiment, the motor 5 drives the motor transmission unit 1 to rotate. When the motor 5 rotates clockwise, the motor transmission unit 1 will drive the double valve linkage unit 2 to rotate clockwise, and the double valve linkage unit 2 drives the first multi-way valve 3 and the second multi-way valve 4 to rotate synchronously clockwise; when the motor 5 rotates counterclockwise, the motor transmission unit 1 will drive the double valve linkage unit 2 to rotate counterclockwise, and the double valve linkage unit 2 drives the first multi-way valve 3 and the second multi-way valve 4 to rotate synchronously counterclockwise. Among them, the motor 5 can be a motor that can realize regular cross-clockwise rotation and counterclockwise rotation in the prior art, so the motor 5 is not described in detail in this embodiment. The technical solution of the present invention realizes the start and stop of one motor 5, and only one motor 5 is used to synchronously drive the injection mode of the first multi-way valve 3 and the second multi-way valve 4, so the injection driving mode of the injection balances the injection time without deviation.

[0049] Another embodiment provided by the present invention, in combination with Figure 1 and Figure 2 The motor transmission unit 1 includes a first transmission rod 13 , and a second transmission rod 14 is connected to the first transmission rod 13 on the side away from the motor 5 .

[0050] The second transmission rod 14 is also connected to a third transmission rod 15 .

[0051] A notch 16 is provided at a connection between the first transmission rod 13 and the second transmission rod 14 away from the third transmission rod 15 .

[0052] The end of the first transmission rod 13 away from the second transmission rod 14 is provided with a motor storage groove 12 for connecting the motor 5 .

[0053] In this embodiment, the notch 16 can help the motor transmission unit 1 maintain balance during rotation, and prevent the motor transmission unit 1 from tilting during long-term rotation.

[0054] Another embodiment provided by the present invention is as follows Figure 2 As shown, a bolt hole 11 for passing a bolt for fixing the motor 5 is provided on the first transmission rod 13 near the motor storage slot 12 .

[0055] The bolt hole 11 is arranged parallel to the second transmission rod 14 .

[0056] In this embodiment, after the bolts are inserted into the bolt holes 11 , the motor 5 can be further stably connected to the motor storage slot 12 .

[0057] Another embodiment provided by the present invention is as follows Figure 2 As shown, the first transmission rod 13 and the second transmission rod 14 are vertically connected.

[0058] The second transmission rod 14 and the third transmission rod 15 are vertically connected.

[0059] In this embodiment, the connection method between the first transmission rod 13, the second transmission rod 14 and the third transmission rod 15 can, on the one hand, reserve a position for the motor storage slot 12 on the first transmission rod 13, the second transmission rod 14 and the third transmission rod 15 to a greater extent, and on the other hand, can assist in achieving the balance of the motor transmission unit 1 during rotation.

[0060] Another embodiment provided by the present invention, in combination with Figure 1 and Figure 3 The double-valve linkage unit 2 includes a first linkage rod 21 connected to the motor transmission unit 1 , and a transmission groove 22 is provided on the first linkage rod 21 .

[0061] The first connecting rod 21 is also connected to the second connecting rod 24 and the third connecting rod 23 respectively.

[0062] In this embodiment, the transmission groove 22 is relatively long, and the width of the transmission groove 22 is the same as the diameter of the third connecting rod 23 .

[0063] Another embodiment provided by the present invention is as follows Figure 3 As shown, the transmission slot 22 is connected to the third transmission rod 23 in the motor transmission unit 1 .

[0064] The diameter of the third link rod 23 on the side close to the first link rod 21 is larger than the diameter of the third link rod 23 on the side far from the first link rod 21 .

[0065] In this embodiment, the transmission groove 22 is relatively long, so that the position of the third transmission rod 23 in the transmission groove 22 can be adjusted, and the connection method between the third transmission rod 23 and the transmission groove 22 can be the connection method in the prior art. The diameter of the third linkage rod 23 close to the first linkage rod 21 is larger than the diameter of the third linkage rod 23 far from the first linkage rod 21, thereby increasing the firmness of the third linkage rod 23.

[0066] Another embodiment provided by the present invention is as follows Figure 3 As shown, the first connecting rod 21 and the second connecting rod 24 are vertically connected.

[0067] The first linking rod 21 and the third linking rod 23 are vertically connected.

[0068] The second link rod 24 and the third link rod 23 are spaced 180 degrees apart.

[0069] In this embodiment, the connection method between the first connecting rod 21, the second connecting rod 24 and the third connecting rod 23 can realize that when the first connecting rod 21 rotates clockwise or counterclockwise in the horizontal direction, the second connecting rod 24 or the third connecting rod 23 can be driven to rotate synchronously.

[0070] Another embodiment provided by the present invention, in combination with Figure 1 and Figure 4 The first multi-way valve 3 includes a valve seat 31 , a valve cover 34 is connected to the valve seat 31 away from the double-valve linkage unit 2 , and a valve core 35 is connected to the valve seat 31 in the valve cover 34 .

[0071] A connecting piece 32 for connecting to the double-valve linkage unit 2 is provided on the valve seat 31 close to the double-valve linkage unit 2, and a valve stem 33 passing through the valve seat 31 and the valve core 35 is provided on the connecting piece 32 away from the double-valve linkage unit 2, and a bearing 36 is connected to the end of the valve stem 33 away from the connecting piece 32.

[0072] An elastic device 37 is connected to the surface of the bearing 36 on the side away from the valve stem 33 , and a fixing plate 39 is connected to the end of the elastic device 37 on the side away from the bearing 36 .

[0073] The second multi-way valve 4 has the same structure as the first multi-way valve 3 .

[0074] In this embodiment, the valve core 35, the bearing 36, the elastic device 37 and the fixing plate 39 are all arranged in the valve cover 34. The elastic device 37 is a spring or a device that can realize elastic contraction in the prior art.

[0075] Another embodiment provided by the present invention is as follows Figure 4 As shown, a limit portion is provided on the surface of the valve cover 34 close to the bearing 36 .

[0076] The limiting portion includes a first limiting edge 341 , the first limiting edge 341 is vertically connected to a second limiting edge 342 , and the end of the second limiting edge 342 away from the first limiting edge 341 is vertically connected to a third limiting edge 343 extending toward the fixing plate 39 .

[0077] In this embodiment, the second limiting edge 342 of the limiting portion can limit the maximum position of the bearing 36 in the bearing cover away from the valve core 35 .

[0078] Another embodiment provided by the present invention is as follows Figure 4 As shown, a through hole 38 is provided on the fixing plate 39 .

[0079] The connecting piece 32 on the first multi-way valve 3 is connected to the third linkage rod 23 , and the connecting piece 32 on the second multi-way valve 4 is connected to the second linkage rod 24 .

[0080] In this embodiment, the shape of the through hole 38 can be selected according to the actual working conditions.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and the modifications or replacements made without departing from the spirit of the present invention are all within the scope of protection claimed by the present invention.

Claims

1. A dual multi-way valve injection drive device, comprising a device body, characterized in that: The device body comprises a motor transmission unit, and the motor transmission unit is connected to a motor; The motor transmission unit is also connected to a double-valve linkage unit; The double-valve linkage unit is also connected to a first multi-way valve and a second multi-way valve respectively; The motor transmission unit comprises a first transmission rod, and a second transmission rod is connected to the first transmission rod at a side away from the motor; The second transmission rod is also connected to a third transmission rod; A notch is provided at a connection between the first transmission rod and the second transmission rod away from the third transmission rod side; The end of the first transmission rod away from the second transmission rod is provided with a motor storage slot for connecting the motor; The first transmission rod and the second transmission rod are vertically connected; The second transmission rod and the third transmission rod are vertically connected; The dual-valve linkage unit comprises a first linkage rod connected to the motor transmission unit, and a transmission groove is provided on the first linkage rod; The first connecting rod is also connected to a second connecting rod and a third connecting rod respectively; The third transmission rod in the motor transmission unit is connected in the transmission groove.

2. The dual multi-way valve injection drive device according to claim 1, characterized in that: The first transmission rod close to the motor storage slot is provided with a bolt hole through which a bolt for fixing the motor passes; The bolt hole is arranged parallel to the second transmission rod.

3. The dual multi-way valve injection drive device according to claim 1, characterized in that: A diameter of the third link rod on a side close to the first link rod is larger than a diameter of the third link rod on a side far from the first link rod.

4. The dual multi-way valve injection drive device according to claim 1, characterized in that: The first connecting rod and the second connecting rod are vertically connected; The first connecting rod and the third connecting rod are vertically connected; The second connecting rod and the third connecting rod are 180 degrees apart.

5. The dual multi-way valve injection drive device according to claim 1, characterized in that: The first multi-way valve comprises a valve seat, a valve cover is connected to the valve seat at a side away from the double-valve linkage unit, and a valve core is connected to the valve seat in the valve cover; A connecting piece for connecting with the double valve linkage unit is arranged on the valve seat close to the double valve linkage unit, a valve stem passing through the valve seat and the valve core is arranged on the connecting piece far from the double valve linkage unit, and a bearing is connected to the end of the valve stem far from the connecting piece; The surface of the bearing away from the valve stem side is connected with an elastic device, and the end of the elastic device away from the bearing side is connected with a fixing plate; The second multi-way valve has the same structure as the first multi-way valve.

6. The dual multi-way valve injection drive device according to claim 5, characterized in that: A limiting portion is provided on the surface of the valve cover close to the bearing side; The limiting portion includes a first limiting edge, the first limiting edge is vertically connected to a second limiting edge, and an end of the second limiting edge away from the first limiting edge is vertically connected to a third limiting edge extending toward the fixing plate.

7. The dual multi-way valve injection drive device according to claim 5, characterized in that: The fixing plate is provided with a through hole; The connecting member on the first multi-way valve is connected to the third connecting rod, and the connecting member on the second multi-way valve is connected to the second connecting rod.

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